adams碰撞仿真出错【求助】

sardin

装配模型在adams中和地面碰撞时出错了

ERROR:      Time T=3.237348860E-01.
   Adams can not solve the equations of motion because the mechanism has
   "locked up".  At least one constraint can no longer be satisfied.
   Adams is unable to satisfy the constraint for:  FxdJnt/74 Zi.Xj.
ERROR:   Simulation failure detected.
ERROR:   Simulation failure detected.


自己改了好多次了，还是出现上面类似的"lock up"问题，希望大家帮帮忙啊

louhb

你把FxdJnt/74 Zi.Xj.删掉。

sardin

回复：louhb
多谢啊，因为jiont都更改名称了，找不到哪个是joint74

sardin

请问各位同仁，出现下面的错误该怎么修改？是不是模型的问题？
ERROR:   At time  5.888780282E-03 the integrator is unable to proceed.  Possible Causes:
(1) The accuracy required for the numerical solution can not be attained.
Relax (increase) the value of the acceptable integration ERROR.
(2) Incompatible redundant constraints, a lock up, or a bifurcation
situation.  The latter two indicate a mechanism design problem.
(3) The system includes a zero (or relatively small) mass on a part with
an unconstrained translational degree of freedom.
Make sure you have mass on all parts with translational degrees of freedom.
(4) The system includes a zero (or relatively small) inertia on a part
with an unconstrained rotational degree of freedom.
Make sure you have inertias on all parts with rotational degrees of freedom.
(5) An Adams element has a function expression that equals exactly itself.
For example,
     SFORCE/id1,I=id2,J=id3,ROT,FUNC=SFORCE(id1,jflag,comp,rm),and
     DIFF/id4,IMPLICIT,IC=0,FUNC=DIF1(id4).
Similarly,
     VARIABLE/id5, FUNC=VARVAL(id5)*TIME
equals itself at 1 second. Avoid setting an Adams element equal to itself.


之前经过这步：There are no redundant constraint equations.Model verified successfully
上面的第五个错误是什么意思？

sardin

有时候仿真可以顺利进行，有时候仿真仍然会出错，奇怪，，
ERROR:      Time T=4.081502481E-02.
   Adams can not solve the equations of motion because the mechanism has
   "locked up".  At least one constraint can no longer be satisfied.
   Adams is unable to satisfy the constraint for:  FxdJnt/32 Xi.Yj.
ERROR:   Simulation failure detected.
ERROR:   Simulation failure detected.


自己改了好多次了，还是出现上面的问题，希望大家帮帮忙啊