柔性体模型问题

x-tay

我在ANSYS里建了个柔性体模型，生成MNF文件导入到ADAMS中，加了约束后不能计算，我是一个屋盖模型，在十二个柱脚处加了十二个固定约束，看错误提醒的意思是不是约束太多了的问题，但是我按实际情况必须加这么多约束，请问该怎么处理啊，MNF文件太大，传不上来，这是ANSYS命令流，直接在ANSYS中运行就能生成MNF文件，麻烦哪位高手能帮忙看下么，多谢了啊~



ERROR:   At time  0.000000000E+00 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.

ERROR:   Simulation failure detected.
ERROR:   Simulation failure detected.
ERROR:   Simulation failure detected.
ERROR:   Simulation failure detected.

reticence

我记得ANSYS里面的梁单元导入到ADAMS中后会丢失扭转自由度，不知道这个会不会导致你的问题

x-tay

reticence 发表于 2013-8-22 15:05
我记得ANSYS里面的梁单元导入到ADAMS中后会丢失扭转自由度，不知道这个会不会导致你的问题 ...

我有一个小的模型，和之前那个是1：20比例的，完全按比例缩放的，截面稍微改了一下，一个是仿照实际的，一个是试验模型，这个就能正常地运算，我觉得是不是尺寸容差的问题，但是我把容差调大也没以算好……

myh051305

是不是模型中有 无质量 物体？