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回顾了动力重分析的各种方法,研究了适合于海洋平台的动力重分析方法,并重点介绍了矩阵摄动法和特征向量降阶法,其特点是对于结构参数小变化能简单有效地给出变化后结构的频率变化且保证一定精度。这对于海洋平台长年受到风浪等动载荷作用及海水腐蚀后其动力特性变化的分析研究具有实际工程意义与应用价值.所编制的动力重分析程序块,可与海洋平台通用动力分析程序相连,使动力分析程序更加完善.用这一程序对单桩模型及四腿平台进行了考核,说明可供工程应用。
Various methods of dynamic reanalysis are reviewed, and the dynamic reanalysis method suitable for offshore platforms is studied. The matrix perturbation method and the eigenvector reduction method are also introduced. The method is characterized by small and variable structural parameters can be simply and effectively After changing the structure of the frequency changes and to ensure a certain accuracy. This has practical engineering significance and application value for the long-term analysis and research on the dynamic characteristics of offshore platforms subjected to dynamic load such as wind and waves and seawater erosion.The dynamical reanalysis program blocks prepared can be connected with the general dynamic analysis program of offshore platform, Make the dynamic analysis program more perfect.Use this procedure to test the single-pile model and four-legged platform, which shows that it can be used in engineering.