youit 发表于 2013-5-12 10:59:55

adams/view中悬置工况计算仿真出现异常情况

adams/view中悬置工况计算仿真悬置插值出现异常情况:
1)ax=11g的工况(其他方向加速度均为0),通过插值函数求的结果异常,如图1:
-AKISPL(DX(MARKER_13,MARKER_14,MARKER_14),0,SPLINE_3, 0)中:
DX(MARKER_13,MARKER_14,MARKER_14)的值为-9.29,
根据spline_3的定义,-AKISPL(DX(MARKER_13,MARKER_14,MARKER_14),0,SPLINE_3, 0)的结果应该为正,但仿真的结果却为负:-1.782e-4。
并且前悬置与后悬置的x向作用力相反,如图2 。与实际应该不相符。

2)当ax=1g的工况(其他方向加速度均为0),该异常出现在前左悬置。如图3:
前左悬置的位移达到-11.1,根据spline_1插值出来的结果,理论应该是到达10e4,但仿真结果却只有 528.1。

3)模型文件见附件。请大家指点一下。谢谢。

http://forum.simwe.com/data/attachment/album/201305/12/103710fgkbpd7l6k9pdbw6.jpg
图1
http://forum.simwe.com/data/attachment/album/201305/12/103632o1hk5yhw4k26g16z.jpg
图2
http://forum.simwe.com/data/attachment/album/201305/12/103533xdpoadxdi3po4px4.jpg










youit 发表于 2013-5-13 20:48:57

已解决。 定义的spline边界范围不过,仿真出现警告:out of range。
原以为,自动延伸边界也可以。
但在模型中,就是因为这个原因导致异常。

但还是解释不了。
为什么会出现异常。

luodaguo023 发表于 2016-10-26 23:34:47

下载后打不开,提示数据破损;我也遇见同样问题,请楼主帮我看看是什么问题啊
WARNING:An Out-of-range X value has been used in the spline calculation.
Extrapolation is required for modeladd_1.SPLINE_1.
The X value (4.089117) should be between -15.000000 and 3.500000
WARNING:An Out-of-range X value has been used in the spline calculation.
Extrapolation is required for modeladd_1.SPLINE_1.
The X value (-15.781682) should be between -15.000000 and 3.500000
WARNING:An Out-of-range X value has been used in the spline calculation.
Extrapolation is required for modeladd_1.SPLINE_1.
The X value (-18.208447) should be between -15.000000 and 3.500000
WARNING:An Out-of-range X value has been used in the spline calculation.
Extrapolation is required for modeladd_1.SPLINE_1.
The X value (586.465024) should be between -15.000000 and 3.500000
WARNING:An Out-of-range X value has been used in the spline calculation.
Extrapolation is required for modeladd_1.SPLINE_1.
The X value (40.704941) should be between -15.000000 and 3.500000
WARNING:Additional Out-of-range warnings suppressed for modeladd_1.SPLINE_1.

luodaguo023 发表于 2016-10-27 12:29:26

楼主,帮我看看呀

林子晓寒 发表于 2016-10-28 20:06:38

感觉自己学的太浅显啦
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