The penalty function method first change the optimization problem with constraints to no constraint problem then solve the no constrains optimization problems using hooke - jeeves direct search method . the above method only use the dynamic analysis result together with penalty function method to solve the multibody desigen optimization problems , and separate the process of dynamic analysis and design optimization , so it is more common 由于该方法是将约束优化问题转化为无约束优化问题,针对无约束优化问题,本文采用通用的hooke - jeeves直接探索优化方法,有效的实现了多体系统动力学分析与优化设计的分离,从而具有通用性。
Both the simplex method and the dfp method are referred to compare the efficiency of the direct search methods with that of the gradient methods . the differential method of stochastic fem is used to calculate the gradient of the objective function hi dfp method . firstly , deterministic fem for seepage is introduced systematically and stochastic fem for seepage is presented 为了对比直接法和梯度法的计算效率,本文采用两种优化方法对渗透系数的确定性反演问题进行了探讨:单纯形法和变尺度法,在分析算例的基础上,笔者就这两种优化方法的效率和稳定性等方面的问题提出自己的观点。