摘要
合理选择确定Rayleigh阻尼矩阵比例阻尼系数的振型频率对于准确计算场地地震响应有重要影响。提出以土层表面的位移反应峰值误差与加速度反应峰值误差的加权平方和为控制目标,基于完全二次项平方根振型组合方法建立控制目标与Rayleigh阻尼系数的函数关系,以控制目标最小为原则形成求解Rayleigh阻尼系数的方法。随机选择28条具有代表性的地震波,通过对某典型深厚土层模型进行地震反应分析,并与其他研究成果进行对比,验证所建议方法的精度及适用性。
The appropriate selection of frequencies for determining Rayleigh damping parameters is significant for the accurate analysis of soil layers with deep deposit.The square weighted sum of errors of peak displacement response and peak acceleration response is proposed to be control objective and its functional relation with Rayleigh damping parameters is established based on complete quadratic combination method.Then a method for determining Rayleigh damping parameters is formed by minimizing the control objective.Dynamic response of a typical soil model with deep deposit,exciting by 28 typical seismic waves,is analyzed to verify the calculation accuracy and applicability of the proposed method.
出处
《振动工程学报》
EI
CSCD
北大核心
2017年第4期638-645,共8页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(51608462
51408609)
福建省教育厅项目(JAT160349)
厦门理工学院高层次人才项目(YKJ15011R)
关键词
地震响应分析
Rayleigh阻尼
阻尼系数
双目标控制
深覆盖土层
dynamic response analysis
Rayleigh damping
damping parameters
dual-objective control
soil layers with deep deposit
