基于时域显式法的非平稳随机地震响应灵敏度分析
发布时间：2018-11-18 15:01
【摘要】：分别采用精细积分格式和Newmark-β积分格式推导了非平稳随机地震响应灵敏度的时域显式表达式.并分别将其应用于平面框架与平面桁架问题的灵敏度分析,研究了积分时间步长对两种积分格式的计算精度和效率的影响.发现:当结构主频处于地震主频范围内时,在同等精度条件下,基于精细积分的时域表达式效率更高;而在结构主频偏离地震荷载主频范围时,基于Newmark-β积分格式的时域表达式效率更高.该研究成果可以为在考虑非平稳随机振动的结构优化问题中的数值积分算法选择提供有效的参考和借鉴.
[Abstract]:The time-domain explicit expressions of the sensitivity of non-stationary random seismic response are derived by using the precise integral scheme and the Newmark- 尾 integral scheme, respectively. It is applied to the sensitivity analysis of plane frame and plane truss respectively, and the effect of integral time step on the accuracy and efficiency of the two schemes is studied. It is found that when the main frequency of the structure is in the range of seismic main frequency, the time domain expression based on precise integration is more efficient under the same precision condition. When the main frequency of the structure deviates from the main frequency range of seismic load, the time domain expression based on Newmark- 尾 integral scheme is more efficient. The results can provide an effective reference for the selection of numerical integration algorithms for structural optimization problems with non-stationary random vibration.
【作者单位】： 华南理工大学土木与交通学院∥亚热带建筑科学国家重点实验室;
【基金】：国家自然科学基金资助项目(11372004) 华南理工大学中央高校基本科研业务费专项资金资助项目(2014ZZ0071)~~
【分类号】：TU311.3
本文编号：2340364
[Abstract]:The time-domain explicit expressions of the sensitivity of non-stationary random seismic response are derived by using the precise integral scheme and the Newmark- 尾 integral scheme, respectively. It is applied to the sensitivity analysis of plane frame and plane truss respectively, and the effect of integral time step on the accuracy and efficiency of the two schemes is studied. It is found that when the main frequency of the structure is in the range of seismic main frequency, the time domain expression based on precise integration is more efficient under the same precision condition. When the main frequency of the structure deviates from the main frequency range of seismic load, the time domain expression based on Newmark- 尾 integral scheme is more efficient. The results can provide an effective reference for the selection of numerical integration algorithms for structural optimization problems with non-stationary random vibration.
【作者单位】： 华南理工大学土木与交通学院∥亚热带建筑科学国家重点实验室;
【基金】：国家自然科学基金资助项目(11372004) 华南理工大学中央高校基本科研业务费专项资金资助项目(2014ZZ0071)~~
【分类号】：TU311.3
【相似文献】
相关期刊论文 前2条
1 翟婉明;大型结构动力分析的Newmark显式算法[J];重庆交通学院学报;1991年02期
2 ;[J];;年期
相关会议论文 前2条
1 苏成;徐瑞;;大型复杂结构非平稳随机振动时域显式法[A];全国结构振动与动力学学术研讨会论文集[C];2011年
2 倪明玖;;不可压流计算的Projection方法和SIMPLE方法间桥梁的搭建[A];庆祝中国力学学会成立50周年暨中国力学学会学术大会’2007论文摘要集（下）[C];2007年
相关硕士学位论文 前2条
1 余超;基于时域显式法的结构瞬时最优控制[D];华南理工大学;2015年
2 李栋泓;非平稳随机地震下桁架结构形状与拓扑优化[D];华南理工大学;2016年
，本文编号：2340364
本文链接：https://www.wllwen.com/jingjilunwen/jianzhujingjilunwen/2340364.html
