7 Replies Latest reply on Oct 14, 2014 1:48 AM by Jared Conway

    圆角与收敛问题

    C. X

      大家好,

            我现在使用simulation分析物体受力情况,有时会遇到一个问题,在应力较大处,模型是存在圆角的,但随着网格的细化,该圆角处的应力始终增大,未达到收敛,请问如何解决。

        • Re: 圆角与收敛问题
          James Riddell

          上传你的模型。是设计足够简单检查了手工计算?您使用的是什么类型的元素?什么是最小特征尺寸和你至少有一半是什么?

          • Re: 圆角与收敛问题
            Jared Conway

            OP >Hello everyone ,

                  I now use the simulation analysis of the forces of objects , sometimes encounter a problem in the stress at large , the model is the presence of rounded , but with mesh refinement , the stress of the fillet is always increasing , not achieve convergence , how to solve .

             

            James > Upload your model. Is designed to be simple enough to check the manual calculation ? You use what type of element ? What is the minimum feature size , and you have at least half of what is ?

             

            OP >So, I can not analyze only half of the model , because it is not symmetrical ; and fillet portions can not be simplified , rounded part of the stress is really require detailed analysis.

             

            James > All models use a very coarse grid and high stress area where you can see the definition of a local fine mesh . You may need to surface portion , the geometry of which does not exist locally , in order to select a fine mesh .

             

            >>Jared >> CX, when you say convergence, are we talking about convergence of stress or displacement. remember that there are singularities that can create divergent stress but displacement should converge. this is where you should focus your efforts at first. then you can look at evaluating the stress. here is a reference: SolidWorks Simulation: Achieving Convergence of Results