[轉載][ABAQUS問題一] import from Standard to e

2017-06-15 by:CAE仿真在線來源:互聯網

在SIMWE論壇上經常有人問到*import的相關內容,Robert_Su對此也做了詳細的說明,具體可登錄http://forum.simwe.com論壇上參看。

上述內容也提到standard模塊中有重力作用下,import到explicit模塊時需要繼續施加重力作用。ABAQUS Analysis幫助中第9.2.2頁的load部分也提到:Loads, including those applied for connector actuation, defined in the original analysis are not imported. Loads may, therefore, need to be redefined in the import analysis. There are no restrictions on the loads that can be applied when results are imported from one analysis to the other. In cases when the loads need to be maintained at the same values as in the original analysis, you can prescribe a constant (step function) amplitude variation for the analysis step (see“Prescribing nondefault amplitude variations” in “Procedures: overview,” Section 6.1.1) to apply the loads instantaneously at the start of the step and hold them for the duration of the step. Alternatively, you can refer to an amplitude curve in the load definition (see“Amplitude curves,” Section 30.1.2).

但對重力作用下是否會出現震蕩,及震蕩后該如何調整,沒有一個明確的說法。這里自己做了兩個算例,僅說明重力是會出現震蕩,至于如何控制,還有待進一步的嘗試。

(1)一個實體塊的自重作用下(材料均為彈性)

說明:簡單的實體從standard輸入到explicit狀態,僅模擬重力狀態;
圖1左邊為隱式計算后得到的豎向變形;右邊為顯式最初狀態(import),云圖兩者一致;
圖2左邊為顯式最初狀態(import);右邊為顯式1s后的豎向變形,云圖兩者一致;