求助！整车装配时出现错误，请大家帮忙看看啊！

haichen1983

我自己建了个后悬架模板，其他模板都用car自带的
整车装配时的错误提示：The inertia tensor is ill formed. Both the CM/IM
orientation and IP will be incorrect.
并且这条提示出现了几十次，到底是咋回事啊？
请大家帮帮忙，先谢谢了！

hecuihuafu

To avoid nonphysical conditions, you must carefully select the desired mass and inertia values. Sometimes, Adams/Car cannot match the desired aggregate mass properties you input because the properties result in negative mass or in negative principal inertias for the part you select to modify.
For example, assume the aggregate mass of the model is 2000 kg, and the mass of the part is 400 kg. If you input a desired aggregate mass of 1500kg, then to match the desired mass the modified part must have a mass of (400+(1500-2000))=-100 kg, which is nonphysical. Two conditions lead to error:
&#8226;  If the calculated mass for the part < 0, Adams/Car cancels the adjustment.  

&#8226;  If the principal inertias < 0, Adams/Car adjusts the mass and the location of the center of gravity (CG) of the part (so that the overall location of the CG of the model is the one you entered), but does not modify the moments of inertia.

zeng237022

请问楼主这个问题解决了吗？我现在建立了一个物流车模型，装配时也遇到了同样的问题，如果你解决了，可不可以给我讲解一下，十分感谢