219mze 发表于 2024-10-2 19:35:24

ANSYS Workbench结构分析网格划分的总体掌控和局部掌控解析


    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">导读</span></strong><span style="color: black;">：网格划分是有限元分析前处理的重要环节。<span style="color: black;">通常</span><span style="color: black;">来讲</span>，需要<span style="color: black;">首要</span>设置网格<span style="color: black;">掌控</span>选项，<span style="color: black;">而后</span>再进行网格划分。在ANSYS Mechanical界面中，网格划分的<span style="color: black;">掌控</span>选项可分为总体<span style="color: black;">掌控</span>和局部<span style="color: black;">掌控</span>两大类。总体<span style="color: black;">掌控</span>可<span style="color: black;">经过</span>Mesh分支来实现，局部<span style="color: black;">掌控</span><span style="color: black;">经过</span>Mesh分支上下文菜单或Mesh工具栏实现。本文将向读者<span style="color: black;">伴侣</span>介绍ANSYS Workbench结构分析中的常用网格划分选项及其<span style="color: black;">功效</span>原理。<span style="color: black;">更加多</span><span style="color: black;">关联</span>内容，<span style="color: black;">能够</span>关注尚晓江博士等编著的《ANSYS Workbench结构分析理论详解与高级应用》（中国水利水电出版社，2020年版）。</span></p>
    <h1 style="color: black; text-align: left; margin-bottom: 10px;"><span style="color: black;">1、</span>网格划分总体<span style="color: black;">掌控</span>选项</h1>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">网格划分总体<span style="color: black;">掌控</span>选项<span style="color: black;">经过</span>Mesh分支的Details选项进行设置，如下图所示。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/7255b157b28640c0abcbb1a3d16db070~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=HhEqSVp8Z6semdZx9TZeT8eXiHA%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">常用的总体<span style="color: black;">掌控</span><span style="color: black;">包含</span>Defaults、Sizing、Quality、Advanced等，Quality为网格质量<span style="color: black;">评估</span>信息，感兴趣的读者<span style="color: black;">能够</span>参考之前发布的<span style="color: black;">文案</span>：ANSYS Mechanical中的网格质量<span style="color: black;">评估</span><span style="color: black;">办法</span>与应用。Inflation选项多用于CFD边界层的网格<span style="color: black;">掌控</span>，在结构分析中较少使用。Statistics为网格统计信息，如节点总数、单元总数等。</span><strong style="color: blue;"><span style="color: black;">下面对Defaults、Sizing及Advanced等总体选项进行介绍。</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">1、Defaults总体<span style="color: black;">掌控</span>选项</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">如下图所示，Defaults是网格划分的缺省选项。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/437226a1cc024f7380090dcbf367eaba~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=oIVV%2B2yLEqypUhHN5KB%2BJhvjHuQ%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">其中Element Order用于<span style="color: black;">掌控</span>单元的阶数（老版本中为Element Midside Nodes选项），<span style="color: black;">能够</span><span style="color: black;">选取</span>Program Controlled、Linear或Quadratic。<span style="color: black;">针对</span>实体结构<span style="color: black;">一般</span>会自动<span style="color: black;">选取</span>二次的186和187单元。Element Size用于设置缺省的总体网格尺寸，直接定义一个数值<span style="color: black;">就可</span>。Mechanical旧版本中是<span style="color: black;">经过</span>Relevance选项设置总体网格相对尺寸的，新版本<span style="color: black;">已然</span><span style="color: black;">再也不</span>采用。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">2、Sizing总体<span style="color: black;">掌控</span>选项</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">Sizing<span style="color: black;">包括</span>网格划分总体尺寸<span style="color: black;">掌控</span>，<span style="color: black;">详细</span>选项与Use Adaptive Sizing设置<span style="color: black;">相关</span>。当Use Adaptive Sizing设置为Yes（缺省）时的尺寸选项如下图所示。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/667be51821734d8c856847dfaf5e99b4~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=fpXFfK4RM7UIkU%2FYUrIeOP6ctz0%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">当Use Adaptive Sizing设置为No时的尺寸选项如下图所示。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/17ef968d0bc346bc813cd1b0d90bdc17~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=hqbCE%2FBRag4LszdXxuiS6yZdlmQ%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">下面对Sizing总体<span style="color: black;">掌控</span>选项作简单的说明。</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">①Use Adaptive Sizing选项。</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">此选项用于<span style="color: black;">掌控</span>自适应尺寸选项，缺省为Yes。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">②Resolution选项。</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">当Use Adaptive Sizing选项设为Yes时<span style="color: black;">显现</span>，在0~7范围内<span style="color: black;">选取</span>，由0至7网格越来越密。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">③Growth Rate和Max Size选项。</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">当Use Adaptive Sizing选项设为No时<span style="color: black;">显现</span>。Growth Rate<span style="color: black;">暗示</span>相邻两层单元的边长增长率。Max Size为最大单元尺寸，可<span style="color: black;">运用</span>缺省值或用户指定的值。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">④Mesh Defeaturing和Defeature Size选项。</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">Mesh Defeaturing选项用于设置细节特征的消除，缺省为Yes且需要指定Defeature Size值。Defeature Size值为一个正数，用户<span style="color: black;">能够</span>指定<span style="color: black;">详细</span>的数值。几何小特征清除支持的网格划分<span style="color: black;">办法</span><span style="color: black;">包含</span>：3D实体划分的Patch Conforming Tetrahedron、Patch Independent Tetrahedron、MultiZone、Thin Sweep、Hex Dominant以及表面网格划分的Quad Dominant、All Triangles、MultiZone Quad/Tri等。<span style="color: black;">针对</span>Patch Independent Tetrahedron、MultiZone和MultiZone Quad/Tri划分<span style="color: black;">办法</span>，在<span style="color: black;">这儿</span>指定的Defeature Size将会填充到<span style="color: black;">办法</span>局部<span style="color: black;">掌控</span>选项中，<span style="color: black;">倘若</span>后续修改了局部<span style="color: black;">掌控</span>，则局部<span style="color: black;">掌控</span>将改写此处指定的总体Defeature Size。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">⑤Transition选项</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">当Use Adaptive Sizing选项设为Yes时<span style="color: black;">显现</span>，用于影响临近单元的尺寸过渡速率，可<span style="color: black;">选取</span>Slow或Fast，设为Slow将形成光滑过渡的网格，而设为Fast 则尺寸过渡较为<span style="color: black;">忽然</span>。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">⑥Span Angle Center</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">Span Angle Center选项仅当Use Adaptive Sizing选项设为Yes时<span style="color: black;">显现</span>，用于设置<span style="color: black;">运用</span>Adaptive Size Function时基于曲率的细化<span style="color: black;">目的</span>。<span style="color: black;">针对</span>曲线区域，网格将沿曲率再分直到单个单元跨过这个<span style="color: black;">方向</span>。Coarse选项一个单元最大跨过<span style="color: black;">方向</span>90度，Medium选项一个单元最大跨过<span style="color: black;">方向</span>75度，Fine选项一个单元跨过最大<span style="color: black;">方向</span>为36度。<span style="color: black;">这儿</span>单元跨越的<span style="color: black;">方向</span><span style="color: black;">指的是</span>法向<span style="color: black;">方向</span>的改变量，如下图所示的α。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p9-sign.toutiaoimg.com/pgc-image/cbb4019cde47441fac28e97fe5762eee~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=3Rv%2F70o45mMZTHDguyndaVQh6Mk%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">⑦Initial Size Seed</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">仅当Use Adaptive Sizing选项设为Yes时<span style="color: black;">显现</span>，此选项用于<span style="color: black;">掌控</span>各部件的初始网格尺寸播种，可<span style="color: black;">选取</span>Assembly或Part选项，其中缺省选项为Assembly。Assembly<span style="color: black;">暗示</span>基于<span style="color: black;">包括</span>所有部件的对角线范围；Part选项基于单一部件范围，<span style="color: black;">一般</span>可能会<span style="color: black;">引起</span>更精细的网格。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">⑧Capture Curvature选项</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">Capture Curvature选项为曲率<span style="color: black;">捉捕</span>选项，仅当Use Adaptive Sizing选项设为No时<span style="color: black;">显现</span>。当Capture Curvature选项设置为Yes时，可指定Curvature Min Size和Curvature Normal Angle参数。Curvature Min Size为曲率<span style="color: black;">周边</span>的最小尺寸，Curvature Normal Angle为单元法向的最大跨角，网格将细化有曲率的区域直至单个单元跨过此<span style="color: black;">方向</span>，其<span style="color: black;">道理</span>与Span Angle Center中的法向<span style="color: black;">方向</span>改变量相同。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">⑨Capture Proximity选项</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">当Use Adaptive Sizing选项设为No时<span style="color: black;">显现</span>。设置此选项为Yes时，可指定Proximity Min Size和Num Cells Across Gap参数。Proximity Min Size为间隙<span style="color: black;">周边</span>的最小单元尺寸，Num Cells Across Gap指定在狭窄的间隙中的单元数。Proximity Size Function Sources则决定面和边之间的哪个区域是proximity Size Function起<span style="color: black;">功效</span>的区域，可指定边（Edges）、面（Faces）或面和边（Faces and Edges）。指定为Edges时，仅边之间的狭窄面区域的网格被细化，而指定为Faces时，仅距离相近的表面之间的体积被细化。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">3、Advanced总体<span style="color: black;">掌控</span>选项</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">Advanced部分<span style="color: black;">供给</span>了<span style="color: black;">有些</span>网格的高级总体<span style="color: black;">掌控</span>选项，如下图所示。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/635e4803ab4b4935876fbb423a1bcff6~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=9Yvcm1BjRe3yfAgmMIkX89Rcte4%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">①Number of CPUs for Parallel Part Meshing</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">此选项用于设置并行部件分网<span style="color: black;">运用</span>的处理器个数。可<span style="color: black;">选取</span>0到256之间的数值。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">②Straight Sided Elements</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">Straight Sided Elements选项用于指定单元为直边，可<span style="color: black;">选取</span>Yes或No，此选项可影响二次单元（Element Order设为Quadratic时）中间节点的<span style="color: black;">安置</span>。如下图(a)所示，设置此选项为Yes，所形成的二次单元均<span style="color: black;">拥有</span>直边。如下图(b)所示，设置此选项为No，则形成的单元均<span style="color: black;">拥有</span>曲边。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/a1487a09d8f2419aafe3668760b729b6~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=nWLSY8GPrI9yUPkMK2n1xrgRWKk%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">③Rigid Body Behavior</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">此选项用于指定刚体的网格划分选项，<span style="color: black;">倘若</span>Geometry分支下<span style="color: black;">无</span>被设置为刚性的体，则此选项为不可编辑状态。<span style="color: black;">通常</span>结构分析中缺省为Dimensionally Reduced，仅形成表面接触网格。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">④Triangle Surface Mesher</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">此选项控制patch conforming划分<span style="color: black;">办法</span>将<span style="color: black;">运用</span>哪一种三角形面网格划分策略。可<span style="color: black;">选取</span>的选项<span style="color: black;">包含</span>Program Controlled以及Advancing Front。<span style="color: black;">通常</span><span style="color: black;">来讲</span>，advancing front 算法可<span style="color: black;">供给</span>更平滑的尺寸变化和更好的skewness以及orthogonal quality指标。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">⑤Topology Checking</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">此选项<span style="color: black;">掌控</span>在patch independent划分<span style="color: black;">办法</span>后续<span style="color: black;">是不是</span>执行拓扑<span style="color: black;">检测</span>。缺省<span style="color: black;">选取</span>No，patch independent<span style="color: black;">办法</span>试图<span style="color: black;">捉捕</span>到受<span style="color: black;">守护</span>的拓扑并进行印记，但当网格尺寸过粗或<span style="color: black;">因为</span>受到限制<span style="color: black;">不可</span><span style="color: black;">捉捕</span>特征时，跳过拓扑<span style="color: black;">检测</span>。<span style="color: black;">选取</span>Yes时，网格划分后运行拓扑<span style="color: black;">检测</span>以确保网格与受<span style="color: black;">守护</span>拓扑的正确<span style="color: black;">相关</span>，<span style="color: black;">倘若</span>网格<span style="color: black;">不可</span>与拓扑特征正确<span style="color: black;">相关</span>就会报错。支持拓扑<span style="color: black;">检测</span>的网格划分<span style="color: black;">办法</span><span style="color: black;">包含</span>3D的Patch Independent Tetra、MultiZone以及2D的MultiZone Quad/Tri、Quadrilateral Dominant、Triangles。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">⑥Pinch</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">此选项用于在网格中忽略小的几何特征，以便在这些特征<span style="color: black;">周边</span>生成质量更好的单元。指定了Pinch<span style="color: black;">掌控</span>后，满足准则的小特征将被“挤”掉。Pinch Tolerance选项用于指定pinch操作的容差（<span style="color: black;">少于</span>此容差的小特征将被清除）。</span></p>
    <h1 style="color: black; text-align: left; margin-bottom: 10px;"><span style="color: black;">2、</span>网格划分的局部<span style="color: black;">掌控</span>选项</h1>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">网格局部<span style="color: black;">掌控</span><span style="color: black;">重点</span><span style="color: black;">包含</span>网格划分<span style="color: black;">办法</span><span style="color: black;">掌控</span>以及局部尺寸<span style="color: black;">掌控</span>，<span style="color: black;">亦</span><span style="color: black;">包括</span><span style="color: black;">有些</span>其他的局部<span style="color: black;">掌控</span>，这些<span style="color: black;">掌控</span><span style="color: black;">能够</span><span style="color: black;">经过</span>Mesh分支的鼠标右键菜单Insert来添加，如下图所示。本文将着重介绍其中在结构分析中较为常用的局部<span style="color: black;">掌控</span>选项。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/48b2e65a96734a3abea75a61e46c67fc~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=1UMqMejcZwRWgi8UIx7QImZAbXA%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">1、网格划分<span style="color: black;">办法</span><span style="color: black;">掌控</span>选项</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">网格划分<span style="color: black;">办法</span>（Method）是最常用的局部<span style="color: black;">掌控</span>选项，在Mesh分支的右键菜单中<span style="color: black;">选取</span>Insert&gt;Method，可在Mesh分支下添加网格划分<span style="color: black;">办法</span><span style="color: black;">掌控</span>分支，此分支的缺省名<span style="color: black;">叫作</span>为“Automatic Method”，即：自动网格划分，<span style="color: black;">此时</span>Mechanical缺省采用Automatic<span style="color: black;">办法</span>划分网格，此<span style="color: black;">办法</span>试图对可扫略划分的体进行扫略（Sweep）划分，而对<span style="color: black;">不可</span>扫略的体采用四面体划分（Patch Conforming<span style="color: black;">办法</span>）。在Automatic Method网格划分<span style="color: black;">办法</span>的Details中，<span style="color: black;">首要</span><span style="color: black;">选取</span>几何对象并在Geometry选项中单击Apply，在Method选项的下拉列表中<span style="color: black;">选取</span>网格划分<span style="color: black;">办法</span>，如下图所示。<span style="color: black;">倘若</span><span style="color: black;">选取</span>了其他网格划分<span style="color: black;">办法</span>，Method分支的名<span style="color: black;">叫作</span>随之改变。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/b42917cd7bb243f4a77e40fc9b7b35ca~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=cFRArxdW4WRl%2FNEGhDbBeqHRdBA%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">Mechanical中<span style="color: black;">供给</span>了五种适合于结构分析的网格划分<span style="color: black;">办法</span>，每一种划分<span style="color: black;">办法</span>（Method）及其技术简介列于表1中。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/a1877119c362439f86914ea8b0b75491~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=5yJYEESwfi18np64g%2Fh03CXQhg4%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">以上</span><span style="color: black;">各样</span>划分<span style="color: black;">办法</span>的<span style="color: black;">详细</span>选项均比较直观，<span style="color: black;">这儿</span><span style="color: black;">再也不</span>逐一讲解，仅针对Sweep划分<span style="color: black;">办法</span>作简单的说明。Sweep<span style="color: black;">办法</span>的Src/Trg Selection选项用于<span style="color: black;">选取</span>源面以及<span style="color: black;">目的</span>面，可<span style="color: black;">经过</span>下拉列表<span style="color: black;">选取</span>，如下图所示，有5种可供<span style="color: black;">选取</span>的选项，其中的Automatic Thin（自动薄壁扫略）和Manual Thin（手工薄壁扫略）用于对薄壁实体进行扫掠划分。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/ab97f414bb0240cb9c621a8694794ca9~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=CTfIwZEt75xxRw2DE48wvIpPhsE%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">选取</span>薄壁扫掠划分选项时，需指定Element Option附加选项，如下图所示，这个附加选项用于<span style="color: black;">选取</span>生成体单元（SOLID）还是实体壳单元（SOLID SHELL）。实体壳单元<span style="color: black;">能够</span>用于模拟变厚度壳体，是一种很实用的单元。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/fcbebae78eed480bba45f879f4d227b5~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=15JnxEvCG3GLfGydMWC4xnIkItg%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">2、局部尺寸<span style="color: black;">掌控</span>选项</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">局部的尺寸<span style="color: black;">掌控</span>选项<span style="color: black;">包含</span>针对几何对象的尺寸<span style="color: black;">掌控</span>、接触区域的网格尺寸<span style="color: black;">掌控</span>以及局部加密<span style="color: black;">掌控</span>。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">①几何对象尺寸</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">在Mesh分支的鼠标右键菜单中<span style="color: black;">选取</span>Insert&gt;Sizing，在Mesh分支下添加Sizing分支。Sizing分支用于对几何对象的网格划分尺寸进行<span style="color: black;">掌控</span>。在Sizing分支的Details中<span style="color: black;">选取</span><span style="color: black;">区别</span>的几何对象类型，Sizing分支会<span style="color: black;">按照</span>所<span style="color: black;">选取</span>的对象类型自动改变名<span style="color: black;">叫作</span>，例如：Vertex Sizing、Edge Sizing、Face Sizing、Body Sizing。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">对<span style="color: black;">各样</span>Sizing<span style="color: black;">掌控</span>，<span style="color: black;">按照</span>其Type选项的<span style="color: black;">区别</span>，有两种<span style="color: black;">区别</span>的设置方式。如下图所示，<span style="color: black;">选取</span>Type为Element Size时，可直接指定单元尺寸Element Size。Behavior选项<span style="color: black;">选取</span>Hard将比Soft采用更加严格的尺寸<span style="color: black;">掌控</span>。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/e184e637848e4b38834f75b3f65d7c2f~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=nXhiWUmXrz2KmJB4CKnprMn2djA%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">如下图所示，<span style="color: black;">选取</span>Type为Sphere of Influence（影响球），<span style="color: black;">经过</span>定义影响球的球心（指定坐标系，其原点<span style="color: black;">做为</span>球心）及其半径，再指定影响球内的Element Size，<span style="color: black;">此时</span>尺寸<span style="color: black;">掌控</span>仅<span style="color: black;">功效</span>于影响球的半径范围内。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/f605e72ff9424208bcacb99894baf9cc~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=7NapS4%2BDH57Rhr51z5W1Ed6R3j8%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">利用影响球<span style="color: black;">能够</span>仅在关注的区域内细分单元，而<span style="color: black;">不消</span>在全域上细分，如下图所示。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/9abc46b62e6e4ed8bb29e463cc2d2c47~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=o5M9c5u6rrRHM7XPbW5AGLGc4xU%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">②接触区域网格尺寸ContactSizing</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">在Mesh分支的鼠标右键菜单中<span style="color: black;">选取</span>Insert&gt; Contact Sizing，或拖拉一个Contact Region分支到Mesh分支上，都将在Mesh分支下形成一个Contact Sizing分支，此分支用于在接触区域两侧表面形成相对一致尺寸的单元。ContactSizing<span style="color: black;">能够</span><span style="color: black;">经过</span>ElementSize方式或Relevance方式<span style="color: black;">掌控</span>接触区域的网格尺寸。<span style="color: black;">选取</span>Element Size方式时需要指定一个<span style="color: black;">详细</span>的单元尺寸数值，而<span style="color: black;">选取</span>Relevance方式时则<span style="color: black;">经过</span>指定Relevance值设置一个接触区域的相对单元尺寸, Relevance数值在-100到100之间变化，越接近-100网格越粗，反之越接近100则网格越细。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">③Refinement</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">在Mesh分支的右键菜单中<span style="color: black;">选取</span>Insert&gt;Refinement，在Mesh分支添加Refinement分支，<span style="color: black;">能够</span>用于网格加密设置。Refinement 的Details如下图所示，Scope部分的Geometry选项用于<span style="color: black;">选取</span>需要加密的局部几何对象，Definition部分的Refinement选项用于指定最大加密次数，可<span style="color: black;">选取</span>1到3之间。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/d45136ee010d4623ba82f72f0c05c056~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=suofokKf89jnFXSWwO9bYEe1aDs%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">3、其他的局部<span style="color: black;">掌控</span>选项</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">经过</span>Mesh分支的鼠标右键菜单，还<span style="color: black;">能够</span>添加其他的局部<span style="color: black;">掌控</span>选项，下面对这些<span style="color: black;">掌控</span>选项作简单的介绍。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">①Face Meshing Control</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">选取</span>Mesh分支的右键菜单Insert&gt;FaceMeshing，<span style="color: black;">能够</span>在Mesh分支下加入Face Meshing分支，此分支用于生成面上的映射网格，改善表面网格的质量。Face Meshing支持的网格划分<span style="color: black;">办法</span><span style="color: black;">包含</span>3D的Sweep、Patch ConformingTetrahedron、Hex Dominant、MultiZone以及2D的QuadrilateralDominant、Triangles和MultiZone Quad/Tri。下图为表面映射网格和自由网格的对比，显然，添加了FaceMeshing Control的网格质量更好。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/6d00f54190a6473ba8da7e2fa945c6eb~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=U2wtklKnrJBwzt0HlLFGD4I9Uc0%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">②Match Control</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">MatchControl选项用于匹配两个或多个面上的网格，支持<span style="color: black;">运用</span>MatchControl的网格划分<span style="color: black;">办法</span><span style="color: black;">包含</span>3D的Sweep、PatchConforming、MultiZone以及2D的QuadDominant和AllTriangles。<span style="color: black;">运用</span>MatchControl时，<span style="color: black;">选取</span>Mesh分支，在其右键菜单中<span style="color: black;">选取</span>Insert&gt;Match Control，在Mesh分支下添加一个MatchControl分支，<span style="color: black;">而后</span>在其Details中进行<span style="color: black;">关联</span>选项设置。<span style="color: black;">按照</span>Details中Transformation选项的<span style="color: black;">区别</span>，有cyclic和arbitrary两种类型的匹配<span style="color: black;">掌控</span>选项。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">（1）cyclic类型的选项设置</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">针对</span>ScopingMethod为GeometrySelection需指定High和Low的几何对象，<span style="color: black;">针对</span>ScopingMethod为NamedSelection需指定HighBoundary和LowBoundary。Transformation选项<span style="color: black;">选取</span>为Cyclic，在Axisof Rotation<span style="color: black;">选取</span>一个坐标系，其z轴与几何旋转轴一致。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">（2）arbitrary类型的选项设置</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">针对</span>ScopingMethod为GeometrySelection需指定High和Low的几何对象，<span style="color: black;">针对</span>ScopingMethod为NamedSelection需指定HighBoundary和LowBoundary。Transformation选项<span style="color: black;">选取</span>为Arbitrary，High Coordinate System和Low Coordinate System分别<span style="color: black;">选取</span>对应于High和Low边界的局部坐标系。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">③Pinch Control</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">除总体<span style="color: black;">掌控</span>中的自动pinch<span style="color: black;">掌控</span>外，还可<span style="color: black;">经过</span>Mesh分支的鼠标右键菜单中Insert&gt;Pinch添加Pinch分支，进行局部pinch<span style="color: black;">掌控</span>，其Details如下图所示。在Pinch分支的Details需要定义Master Geometry（<span style="color: black;">保存</span>的几何）和Slave Geometry（被简化的特征），被<span style="color: black;">选取</span>的Master Geometry和Slave Geometry分别<span style="color: black;">表示</span>为红色和蓝色，<span style="color: black;">倘若</span>需要可改变Tolerance（缺省值为总体的Pinch Tolerance）。</span></p>
    <div style="color: black; text-align: left; margin-bottom: 10px;"><img src="https://p3-sign.toutiaoimg.com/pgc-image/626aaad469bb4f31b326d41e96116652~noop.image?_iz=58558&amp;from=article.pc_detail&amp;lk3s=953192f4&amp;x-expires=1728032847&amp;x-signature=DNSeHu9UOY4Pi4PxWeJQli52oBQ%3D" style="width: 50%; margin-bottom: 20px;"></div>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;">综上所述，以上就ANSYS Workbench结构分析网格划分的总体和局部<span style="color: black;">掌控</span>选项进行<span style="color: black;">认识</span>析。<span style="color: black;">更加多</span>Workbench 高级结构分析理论与应用技术细节，<span style="color: black;">举荐</span>小伙伴们参考尚晓江博士等编著的《ANSYS Workbench结构分析理论详解与高级应用》（中国水利水电出版社，2020年版）。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">（完）</span></strong></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">作者简介</span></strong><span style="color: black;">：</span><strong style="color: blue;"><span style="color: black;">尚晓江</span></strong><span style="color: black;">，仿真秀金牌讲师，工学博士，力学和有限元分析理论功底扎实，<span style="color: black;">长时间</span>从事ANSYS软件应用与技术咨询工作，累计为国内用户开展培训或讲座逾3000人次，编著有《ANSYS结构有限元高级分析<span style="color: black;">办法</span>与范例应用（第三版）》、<span style="color: black;">科研</span>生教材《工程结构优化设计<span style="color: black;">办法</span>与应用》、《ANSYS Workbench结构分析理论详解与高级应用》等。</span></p>
    <p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">声明：原创作品，首发仿真秀App，</span></strong><span style="color: black;">部分<span style="color: black;">照片</span>和内容源自网络，如有<span style="color: black;">欠妥</span>请联系<span style="color: black;">咱们</span>，欢迎分享，禁止私自转载，转载请联系<span style="color: black;">咱们</span>。</span></p>




4zhvml8 发表于 2024-10-31 17:42:42

感谢楼主的分享！我学到了很多。
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