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由半解析方法研究地铁隧道 地层系统的动力参数优化反演和动力响应分析问题。隧道结构由平面等参单元离散 ,地层由层单元离散 ,采用半解析位移函数导出了相应离散系统的动力方程和频域中的最小二乘优化反演方程 ,由此 ,在给出参数反演的同时 ,给出了系统的动力响应分析。这种基于参数反演而进行的动力分析可以给出与实际相符的合理结果 ,对地铁系统的设计有一定的实用价值
Semi-analytical Method for Studying Optimized Inversion and Dynamic Response Analysis of Subway Tunnel Stratum System. The tunnel structure is discretized by plane isoparametric elements, and the strata are separated by layer elements. The semi-analytical displacement function is used to derive the dynamic equation of the discrete system and the least-squares optimization inversion equation in the frequency domain. Thus, At the same time, the dynamic response analysis of the system is given. This dynamic analysis based on parameter inversion can give reasonable results in line with the actual results and has certain practical value for the design of metro system