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中文摘要：
提出一个适合于工程系统的二层优化设计方法,该方法把原始问题分解为两层优化问题,顶层为协调系统优化,底层为若干个子系统优化.为了实现该方法的并行分布式计算,在局域网内建立了一个基于PVM的计算环境.一个3 126杆的空间桁架的优化设计实例验证了该算法的收敛性,并分析在并行分布环境下的加速比和并行效率.
英文摘要：
A two-level optimization method for designing engineering systems was advanced, where the original problem was decomposed into a two-level optimization one： ordination system optimization for top level and several subsystem optimization for bottom level. In order to implement parallel distributed computation with this method, a PVM-based computation environment was set up in local network. The convergence was justified by optimization examples of a 3 126-bar three-dimensional truss, and speedup ratio as well as parallel computing efficiency of the method were analyzed also in the parallel distributed environment.
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