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针对水工结构工程计算中经常出现的接触问题,和以往解决此类问题算法的局限性,提出了采用组合网格算法。算法采用两套网格求解,在整个求解区域采用较粗网格,不考虑接触的影响,而在接触区域附近采用较细的网格,考虑接触的影响。整体粗网格求解和局部细网格球求解反复迭代,求得最终结果,与常规有限元方法所求得的解相符合,为求解大型实际复杂问题提供了一个思路和方法。
Aiming at the frequent contact problems in engineering calculation of hydraulic structure and the limitations of previous algorithms to solve such problems, a combined grid algorithm is proposed. The algorithm uses two sets of grids to solve the problem. Coarse grids are used in the entire solution area, and the influence of contact is not considered. In the vicinity of the contact area, a finer grid is used to consider the influence of contact. The whole coarse grid solution and the local fine grid ball iteratively solve the final result, which is in accordance with the solution obtained by the conventional finite element method. This provides an idea and method for solving the large practical complex problem.