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为了提高数值计算的效率,针对结构动力时程分析中由时间步长引起的误差,建立了时间步长与相对误差之间的关系式,实现了满足目标误差限的时间步长自动调整,丰富了时间自适应理论研究.针对无法获取解析解的情况,相对于自适应前,采用时间自适应新方法后计算效率到底能提高多少的问题,提出了解决方法,并用具有解析解的算例进行了验证,结果显示时间自适应新方法在保证计算精度的同时,节省了60.15%的计算时间,非常有效地提高了计算效率,证实了该方法可以对自适应前后计算效率的提高进行准确有效的比较.
In order to improve the efficiency of numerical calculation, the relationship between time step and relative error is established for the error caused by time step in the structural dynamic time history analysis, and the time step to meet the target error limit is automatically adjusted and enriched Aiming at the problem that the analytic solution can not be obtained, this paper proposes a solution to the problem of how much the efficiency can be improved after the adaptive time-adaptive method is adopted, and uses the example with analytic solution The results show that the time adaptive method saves 60.15% of computation time while ensuring the accuracy of computation, and improves the computational efficiency very effectively. It proves that this method can accurately and effectively improve the computational efficiency before and after the adaptation Compare