随机振动分析错误提示
我在用ansys做随机振动分析时，在提交求解的时候有这个提示是怎么回事呀？“one or more diagonal terms of the modal covariance matrix （i.e.,when mode i=mode j）is negative.The 1 sigma results may be incorrect as a results of the PSD curve being improperly represented”有没有哪位知道，给指点一下
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