When modeling structural mechanics in COMSOL, there are often geometric entities that are not significantly affected during a structural analysis. This occurs when rigid bodies exist as part of an elastic structure, since the flexible bodies will account for almost all the deformation. The Rigid Connector feature in COMSOL provides an alternative to modeling these rigid bodies, saving computational time and memory. In this video, we study the stress in a bracket connected to a pin, where a load is applied. The pin is simulated as a rigid connector.The model shown in the video is an extension of the introductory bracket model, outlined in the Structural Mechanics: Static Linear Analysis video tutorial, which includes background information, and discusses the bracket_basic.mph model shown here.
使用 COMSOL 进行结构力学建模时,在结构分析中常常有一些几何实体不会受到显著影响;例如,如果弹性结构包含刚体部件,就会发生这种情况,这是因为几乎所有变形都是在柔性体中产生的。COMSOL 中的“刚性连接件”特征为模拟这类刚体提供了一种选择方案,这种方法有利于节省计算时间和内存。在本视频中,我们研究了与销连接的支架中的应力,其中,销受到外加载荷作用,在模型中作为刚性连接件进行模拟。
本视频中演示的模型对“结构力学:静态线性分析”视频教程展示的基础支架模型进行了扩展,后者介绍了相关背景信息,并讨论了本例中显示的 bracket_basic.mph 模型。