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深入仔细分析决定理性准则法优化效果与优化效率的关键问题——准则是否准确和迭代计算是否收敛.首次提出:在结构优化中,重量作为设计资源除有改善结构性能的一面之外,还会有作为载荷导致结构性能劣化的矛盾的另一面.虚功准则方程组忽略载荷导数,无法考虑重量矛盾作用的另一面,这种忽略不能视为合理近似.因为对于航空航天器、高精度天线和高速运行的机械、车辆等以自重和惯性载荷为主的一大类工程结构,这种忽略导致虚功法得到的解离最优解相差甚远.导重准则法是严密推导的理性准则法,克服了虚功法准则不准的缺陷,优化效果大幅度提高.数据详尽的十杆桁架优化考题算例验证了以上论点.
Depth and careful analysis of the key issues that determine the optimal effect of rational guideline method and optimize the efficiency - whether the criterion is accurate or not and whether the iterative calculation converges.Firstly, in the structure optimization, weight as a design resource in addition to improve the structural performance side, Has the other side as the contradiction that the load leads to the deterioration of the structural performance.Virtual workstandard equations neglect the load derivative and can not consider the other side of the weight contradiction.The neglect can not be regarded as a reasonable approximation.Because for aerospace vehicles, high-precision antenna and High-speed operation of machinery, vehicles and other heavy-weight and inertial load-based structure of a large class of engineering, this negligence led to the dissociation method obtained by the virtual solution is far from the optimal solution.Guide guideline method is closely derived rational guidelines , To overcome the deficiency of the law of virtual power law is not allowed, the optimization effect is greatly improved.Exhaustive data of ten truss optimization test cases validate the above argument.