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rongpinan2銀蟲 (初入文壇)
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[求助]
模態(tài)分析不收斂問題 已有2人參與
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建立了一個壓電圓柱殼模型,邊界添加彈簧combin14單元后,固有頻率計算沒有值,但是不加邊界彈簧計算就沒有問題,需要怎么修改呢? err顯示 *** WARNING *** CP = 456.266 TIME= 16:11:22 Coefficient ratio exceeds 1.0e8 - Check results. *** WARNING *** CP = 529.172 TIME= 16:11:59 Repeated Lanczos shift and factorize steps did not yield additional eigenvalues in the requested frequency range. Either the eigenvalues are widely separated or, there are only 0 eigenvalues in the frequency range specified (FREQB and FREQE in MODOPT command). *** WARNING *** CP = 529.172 TIME= 16:11:59 There may be missing modes in the list of frequencies reported. The Sturm sequence check is not consistent with the number of reported modes. Restart the Lanczos run with a new initial shift point (or Begin Frequency) using the MODOPT command. The current initial shift point is FREQB= 0. *** WARNING *** CP = 529.172 TIME= 16:11:59 There are no modes in the specified range. |
新蟲 (小有名氣)
專家顧問 (職業(yè)作家)
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專家經(jīng)驗: +809 |
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看你的五天: 1 彈簧單元的剛度不合適,造成總剛度矩陣中的最大、最小主元比值太大 (第一個警告信息); 2 給定的頻率范圍不合適,在該范圍中找不到模態(tài)頻率 - 后面幾個警告信息?梢孕薷念l率范圍或不設(shè)置頻率范圍,改為設(shè)置要抽取的模態(tài)個數(shù),一般情況總是會有頻率結(jié)果的。 |
銀蟲 (初入文壇)
專家顧問 (職業(yè)作家)
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專家經(jīng)驗: +809 |
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