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geskliu

铁虫 (初入文坛)

应助: 0 (幼儿园)
金币: 38
帖子: 9
在线: 1小时
虫号: 17654238
注册: 2019-09-23
专业: 机械动力学

[求助] ADAMS仿真运行问题

求助大家一个问题，我仿真一个小车在球体内表面运动，添加运动副，固定副，驱动，设置材料，添加重力，磁力之后可以仿真运行，但是会掉下去，所以加了面面接触，实体对实体，但是这样在运行一小段时间后就会报错，这是为什么呢？求指导。错误代码如下：

At time  3.746506404E+00 the integrator is unable to start/restart.  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.

错误: Simulation failure detected.
错误: Simulation failure detected.
错误: At time  3.250307717E+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.

错误: Simulation failure detected.
错误: Simulation failure detected.

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