论文部分内容阅读
土-结相互作用的时域有限元分析中,力和位移时间卷积关系的局部化处理是建立精确无限域模拟方法的关键。应用物理模型化方法局部化时间卷积,提出一种新的高阶弹簧-阻尼-质量模型,推导了模型的时域、频域方程和相应的标准方程,建立了两类方程参数的转换关系。基于线性系统稳定性理论提出模型系统运动稳定的充分必要条件,并基于罚函数法和遗传-单纯形法建立了考虑模型稳定性的参数识别方法。基于该文参数识别方法的高阶弹簧-阻尼-质量模型系统、简洁,能够在动力有限元程序或商用软件中简单、容易的实现,形成动力稳定的土-结相互作用系统,可以采用显式时间积分求解。弹性地基表面半无限杆问题的分析以及与几种现有方法的比较研究表明该文模型及参数识别方法的有效性。
In the time-domain finite element analysis of soil-knot interaction, the localization of the convolution relationship between force and displacement time is the key to establish the accurate infinite-region simulation method. In this paper, a new high-order spring-damping-mass model is proposed by using physical modeling method to localize the time convolution. The time-frequency and frequency-domain equations and corresponding standard equations of the model are deduced, and the relations between the two types of equations are established . Based on the theory of linear system stability, the necessary and sufficient conditions for the stability of the model system are proposed. A parameter identification method considering the stability of the model is established based on the penalty function method and the genetic-simplex method. The high-order spring-damped-mass model system based on the method of parameter identification is simple and easy to implement in dynamic finite element program or commercial software to form a dynamic stable soil-node interaction system. Explicit Time integral solution. The analysis of semi-infinite bar on the surface of elastic foundation and comparison with several existing methods show the effectiveness of the proposed model and parameter identification method.