时变结构动力响应分析的粗粒度并行算法

Coarse granular parallel algorithm for dynamic responses of time variant structures

在线性时变以及非线性周期时变系统的响应计算问题中，由于在每个时间步上都需要更新系统矩阵、形成等效矩阵并对其进行三角分解，相对定常系统响应逐步积分，时变系统的计算量成倍增加。本文针对工程中的线性时变系统以及非线性周期系统，在分布式网络并行计算机群环境下设计并实现了一个粗粒度并行Ｎｅｗｍａｒｋ法，并将其应用于大型岸边起重机／运行小车系统以及直升机旋翼／机身耦合气弹响应问题，获得了较高的并行效率。

The computation of dynamic responses of large time variant structures is usually very time consuming, due to the fact that system matrices had to be re formulated and factorized in each integration time step. Based upon the relative maturity of the net computing concept, a coarse granular parallel Newmark algorithm for such structures was developed in the parallel virtual machine (PVM) environment and applyed in the dynamic response of the moving trolley/structure system of the large container crane and the aeroelasticity response of the coupled rotor/fuselage system. The results show it has high efficiencies.