pu进行连杆模型出现错误

idreaming

pu在进行连杆模型检查的时候能顺利通过，但是一计算的时候就出现错误，错误提示为在148步的时候关闭。具体的如下： For body Conrod1 the target accuracy could not be reached.3 Accuracy of joint forces:   1.01918E-03 / 1.00000E-03 (reached/target)
3 Highest deviations occur at Node/DOF: 43610/2, 43510/2, 43509/3
3 For body Cr-Pin1 the target accuracy could not be reached.
3 Balance of forces:          1.43496E-02 / 1.90808E-03 (reached/target)
1 Interrupted or ended loop unsuccessful after 900 iterations
1 (-) New time step size
3 Information (Code 8420002)

Calculating Jacobian number 29 of bodies.

3 Information (Code 8420013)

New joint jacobians were calculated at least for one joint in step 148.
Number of total joint jacobian updates is 23.
Current Model loop number is 1.

3 For body Conrod1 the target accuracy could not be reached.
3 Accuracy of joint forces:   1.01913E-03 / 1.00000E-03 (reached/target)
3 Highest deviations occur at Node/DOF: 43610/2, 43510/2, 43509/3
3 For body Cr-Pin1 the target accuracy could not be reached.
3 Balance of forces:          1.42898E-02 / 1.90809E-03 (reached/target)
1 Interrupted or ended loop unsuccessful after 900 iterations
2 Warning (Code 9930004)

Non-constant step size was requested. Tried to undershoot minimum step size
more than once due to troubles in model loop.
Step size could not be adapted successfully.

   User action: (1) Use smaller minimum step size
                (2) Restart simulation up to last successful step
                    and analyze behavior with IMPRESS 3D
                (3) Contact technical support

2 Warning (Code 8420006)

Model loop was not successful.
The according step size adaption was not successful either.
The simulation is shut down in step 148.


这个是怎么回事呢？我要去修改哪里？可是我的连杆和曲轴销都检查了数遍了，跟帮助文档上面一样。

jrmjyh

顶一下                             

xyz2010308

楼主有没有解决这个问题啊

idreaming

xyz2010308 发表于 2014-8-3 09:54
楼主有没有解决这个问题啊

这个我重新把网格精度提高了就可以算了！

fengshandejia66

请问楼主网格精度提高，是把有限元网格尺寸画的更小吗？我计算中也出现这个问题

idreaming

fengshandejia66 发表于 2016-3-1 21:06
请问楼主网格精度提高，是把有限元网格尺寸画的更小吗？我计算中也出现这个问题
...

记得当时是在连杆大小头的上轴向方向的几层网格间距精度不够，后面调整成一样的就可以计算了。

DrLan

周向60等分