用 adams car中的ride 四柱台做平顺性遇到的问题？
Begin Simulation****** Performing Dynamic Simulation using Gstiff I3 Integrator ******
The system is modelled with INDEX-3 DAEs.
The integrator is GSTIFF, CORRECTOR = modified
Integration error = 1.000000E-02
Simulation Step Function Cumulative Integration CPU
Time Size EvaluationsSteps Taken Order time
______________________ ______________________ _________ ________
0.00000E+001.49701E-03 0 0 1 2.15
9.88024E-014.84787E-04 6013 1910 3 33.99
1.97605E+004.89070E-04 11441 3641 3 1:02
2.96407E+002.68246E-04 17324 5425 2 1:33
3.95210E+007.27786E-04 22637 7106 3 2:01
4.94012E+005.19767E-04 28028 8818 2 2:29
5.92814E+004.67054E-04 33375 10511 2 3:01
STFINT:MIN_STEP_SIZEHMIN=2.994011976E-08; Reached At Time=6.865499969E+00.
The integrator could not advance the simulation.
An attempt to further decrease the integration step-size failed.
Suggested course of action:
1. Decrease the value of HMIN.
2. Relax the accuracy requirements (ERROR) on the integrator.
3. Increase the number of iterations allowed for convergence.
4. Revisit the way the mechanical system has been modeled.
Last good step-size: 3.449219092E-08.
---- START: ERROR ----
At time6.865499969E+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,
仿真总是进行到5秒多久终止了，然后出现下面的错误提示，哪位朋友遇到过这个问题？怎么解决呢？
还有就是自己做 陈军主编的那本 adams 技术与工程分析实例上面第285页的例子时也会遇到这样的问题，这是怎么回事呢？ 我也遇到这个问题了，只是尝试着调求解器。 本帖最后由 逆鳞1989 于 2015-4-28 09:03 编辑
检查约束和变量设置，检查轮胎是否合理 这个问题 可能会是路面问题 或者是车辆参数的问题 调整求解器可能不行 楼主解决了吗？我在仿真时也遇到了这个问题
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