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实时子结构混合试验中的数值积分方法对比分析

, PP. 60-67

Keywords: 子结构混合试验,中心差分法,算子分解法,Chang方法,显式Newmark方法,CR方法,时滞

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Abstract:

将CR方法运用到振动台子结构混合试验中,并结合作动器的时滞和外插时滞补偿方法进行了研究。文中将改造的中心差分法、改造的算子分解法、改造的Chang方法、改造的显式Newmark方法均与CR方法进行了对比分析。结果表明,改造的算子分解法的稳定性最差,当不考虑阻尼影响时改造的显式Newmark方法的稳定界限为2,改造的中心差分法与原方法的稳定性无变化,时滞对改造的中心差分法和改造的算子分解法的影响最大,且外插补偿的效果均比其它三种方法差;改造的Chang方法和改造的显式Newmark方法及CR方法经时滞补偿后得到的位移基本与全结构分析得到的位移吻合。建议在振动台子结构混合试验中采用CR方法进行试验,并采用外插补偿的办法解决时滞问题。

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