abaqus同一節(jié)點(diǎn)可以同時(shí)施加加速度和固定約束嗎？ 20
剛自學(xué)abaqus，要對模型進(jìn)行顯式動(dòng)力學(xué)分析，想施加一個(gè)正弦加速度載荷，但是分析總是出錯(cuò)
想問一下大家是不是加速度載荷和固定約束沖突了，因?yàn)榧铀俣容d荷我是加在整個(gè)模型上的，不知道怎樣解決
***ERROR: THIS DEGREE OF FREEDOM HAS BOTH DISPLACEMENT AND ACCELERATION
SPECIFIED. THIS IS NOT ALLOWED. NODE 118 INSTANCE GROUP53 DOF 3
***NOTE: DUE TO AN INPUT ERROR THE ANALYSIS PRE-PROCESSOR HAS BEEN UNABLE TO
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***ERROR: TWO BOUNDARY CONDITIONS WITH CONFLICTING DISPLACEMENTS HAVE BEEN
IDENTIFIED FOR NODE 118 INSTANCE GROUP53 DOF 3. THIS SITUATION MAY
ALSO OCCUR WHEN BOUNDARY CONDITIONS HAVE BEEN DEFINED FOR A NODE SET
CONTAINING THIS NODE AND LATER RE-DEFINED USING THE NODE LABEL
INSTEAD. IF THIS IS THE CASE, PLEASE MAKE THE DEFINITIONS CONSISTENT
BY USING EITHER THE NODE SET OR NODE LABEL.
以實(shí)體單元為例，主變數(shù)是節(jié)點(diǎn)上的位移，所以決定位移搭配形狀函數(shù)可以得到該單元的位移場分佈，位移場對時(shí)間二次導(dǎo)數(shù)即是加速度，因此位移就間接決定加速度，如果兩者都給定就會(huì)衝突報(bào)錯(cuò)誤。就這個(gè)概念，位移跟加速度不能同時(shí)設(shè)定，必須二擇一。