1.最简单的我想应该是完全固结，用/RBODY. 2.还可以 用 /PROP/SPR_BEAM来 模拟 焊点。可以 通过定义 拉，剪，弯，扭的参数定义焊点的 各个力学性能。 2. 用/INTER/TYPE2，这里有Spotflag=25 是专门定义焊点的参数，用Spotflag=20，21，22还可以定义焊点的失效 = 0: set to 5; set to 4 if /CAA is activated = 1: formulation is optimized for spotwelds or rivets = 2: same formulation as standard formulation. Required when using hierarchy levels. Not compatible with nodal time step /DTDA/CST. = 4: rotational DOF are not transmitted (if shells are used) = 5: standard formulation = 20, 21, 22: formulation with failure. Not compatible with nodal time step /DTDA/CST. The stress is computed for each slave node according to the "equivalent" surface around the node. The equivalent surface is defined accordingly = 20: surface computed using shell and brick faces attached to the node. = 21: surface computed using only the shell attached to the node. = 22: surface computed using only the brick faces attached to the node. = 25: penalty formulation = 30: formulation with cubic curvature of master segment. Not compatible with nodal time step /DTDA/CST 3. 用/MAT/LAW59+/FAIL/CONNECT来模拟焊点，他的优点是多于可以用实体单元来模拟每一个焊点，这样能更好的模拟实际受力，焊点的尺寸很小，但是用law59来模拟焊点会避免因为焊点尺寸小而带来的计算步长过小。 工具书 上 Example 48 - Solid Spotweld有 介绍 如何 用 /MAT/LAW59+/FAIL/CONNECT来 模拟 焊点 。