【摘要】 针对目前数值格式求解效率的不足,基于广义Newmark-β法,建立了求解坝体和库水流固耦合动力相互作用问题的2种新的数值求解格式:交错迭代法和直接积分整体求解法.导出了有限元求解公式,讨论了2种数值离散格式的特点,并结合实际工程计算比较了2种求解方法的计算效率.结果表明:2种方法均能有效地求解坝体-库水动力相互作用问题;在相同计算条件下,迭代法的计算规模要小,但花费的总机时长;整体求解法的计算效率更具优势.更多还原

【Abstract】 To remedy the solution efficiency limitations of traditional numerical schemes,two new numerical schemes for dynamic analysis of dam-reservoir interaction were established based on the generalized Newmark-β method: the stagger iterative algorithm and the integrated solution method based on the direct integral.The finite element formulations were obtained and the characteristics of the two schemes were discussed.The computation efficiency was also examined through a practical project.The results show that both schemes can be used for dynamic analysis of dam-reservoir interaction problems.Compared with the integrated solution method based on the direct integral,the stagger iterative algorithm has a smaller computational scale,but it needs a longer computation time.The integrated solution method based on the direct integral has better computation efficiency.更多还原