《011_垫片单元在Ansys Workbench12.1中的应用.》.pdfVIP

垫片单元在 Ansys Workbench12.1 中的应用 [袁晚春，金杭海] [艾默生环境优化技术（苏州）研发有限公司, 215021] [ 摘 要 ] 本文基于 Ansys Workbench12.1 版本，对垫片单元的模拟进行了讨论和研究。首先通过简单 模型，针对不同的网格，单元类型，接触算法等因素的影响进行了比较。研究表明：使用非对 称接触，Normal Lagrange 算法，和低阶垫片单元，并保证网格的一致性，可以得到比较准确， 合理的结果。然后对一个工程实例进行分析，对该模型同时使用不同接触刚度的 Augmented Lagrange 和 Normal Lagrange 算法进行比较，结果发现只有使用比较高的接触刚度的时候， Augmented Lagrange 才能得到和 Normal Lagrange 比较接近的结果，此时的穿透也比较小， 但是高接触刚度时的收敛性较差，而且网格的要求很高，容易产生奇异点。同时，还使用了应 力纸（Fuji Paper）对该模型进行了真实接触压力的测量，结果表明和有限元计算非常接近。 基于有限元计算，提出了模型修改方案，得到比较高的垫片压力。 [ 关键词 ] 垫片，接触，非线性 Gasket Analysis in Ansys Workbench 12.1 [Wanchun Yuan, Sail Jin] [Emerson Climate Technologies (Suzhou) Research Development Co., Ltd, 215021] [ Abstract ] Base on Ansys Workbench12.1, this paper gives a study and discussion on the gasket analysis. At first, this study compares the affecting of using different mesh size, element type, and contact algorithm. It is found that, in order to get accurate and reasonable results, we’d better using asymmetric contact behavior, Normal Largrange algorithm, lower order gasket elements (INTER 195), and coincident mesh. Then, an engineering case is included in this study. It uses both Augmented Lagrange and Normal Lagrange (with different contact stiffness) algorithm. It is found that only using higher contact stiffness, Augmented Lagrange algorithm can get the close results to the Normal Lagrange algorithm, and get small penetration. However, it cannot get convergence easily and sometimes is depended on high quality of mesh, otherwise there will be singular points, and not make sense. Meanwhile, the FEA results are compared with Fuji paper testing results, which s