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[求助]
ADAMS仿真运行问题
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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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