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本工作吸取了七十年代以来国外各家研究工作的长处,对我们原先提出的直接滤频法作了改进,改进后的方法使其解自振特性的迭代次数平均减少40%,其计算效率已达到国外其他通用解法的水平。在上述基础上,拟订了具有自己特色的、有效的拱坝抗震分析方法,并编制了相应的计算程序,这些成果已通过实例的考核。本方法采用了比较合理的、根据水体不可压缩假设导出的附加质量矩阵,而且需要的计算机存贮量也较小,适合于在国产计算机上进行拱坝和其他空间挡水结构的抗震分析。
This work draws on the strengths of various foreign research work since the seventies, and improves the original filtering method. The improved method reduces the average number of iterations of its natural vibration characteristics by 40%, and its computational efficiency has reached The level of other common solutions abroad. On the basis of the above, the anti-seismic analysis method of arch dam with its own characteristics and effective has been drawn up and the corresponding calculation program has been compiled. These achievements have passed the assessment of examples. This method uses a more reasonable additional mass matrix derived from the incompressible assumptions of the water body and requires less computer memory for seismic analysis of arch dams and other space retaining structures on domestically produced computers.