surface Load中trvec1、trvec3及trvecn的区别

hunanyangdong

我看了下帮助，似乎trvec1代表在face1方向加力，trvec代表face3，但是通方向的这两种力对结果有些什么影响呢？应用时怎么选（我只想在坡表面加力）？
下面是帮助中的一段说明，另外附上我用trvec1和trvec3做的结果，差别不太大，甚至和trvec2的差别也不大
Examples: follower and non-follower tractions
The following two examples illustrate the difference between applying follower and non-follower tractions in a geometrically nonlinear analysis. Both examples refer to a single 4-node plane strain element (element 1). In Step 1 of the first example a follower traction load is applied to face 1 of element 1, and a non-follower traction load is applied to face 2 of element 1. The element is rotated rigidly 90° counterclockwise in Step 1 and then another 90° in Step 2. As illustrated in Figure 28.4.3–1, the follower traction rotates with face 1, while the non-follower traction on face 2 always acts in the global x-direction. Figure 28.4.3–1 Follower and non-follower traction loads in a geometrically nonlinear analysis, load applied in Step 1: (a) beginning of Step 1; (b) end of Step 1, beginning of Step 2; (c) end of Step 2.



*STEP, NLGEOM Step 1 - Rotate square 90 degrees...*DLOAD, FOLLOWER=YES 1, TRVEC1, 1., 0., -1., 0.*DLOAD, FOLLOWER=NO 1, TRVEC2, 1., 1., 0., 0.*END STEP*STEP, NLGEOM Step 2 - Rotate square another 90 degrees...*END STEP

hunanyangdong

不知道一个具体的单元中哪个面是face1

hunanyangdong

假设水平力，加到face1上是压力，而加到face2上就可能是剪应力了

rizen

同问呀，望高手指点

jacobi

单元的face 或 edge等编号信息在单元说明里面有的，
而且在后处理中可以看到的。

hunanyangdong

谢谢版主回复，能不能详细点，我没找到

hunanyangdong

谢谢楼上兄弟的提示，我找到了