结构优化设计的KFD方法及其在电除尘器本体结构优化中的应用

电除尘器本体结构优化设计是一个规模大,设计变量数多而具有相当难度的几何可调和拓扑可调优化设计问题。对这样一个大型复杂的结构优化问题,本文在文1]的工作基础上,充分利用结构的力学特性,应用有效设计变量的概念,建立了不用求偏导数且不必解线性规划的可行方向法—KFD方法。该方法具有收敛速度快、占用内存少的优点,比通常ε有效约束可行方向法提高速度数十倍。实际应用的结果表明文中的方法是很有效的。

The KFD Method for the Optimum Design of Structure and the Application in the Optimal Design of Whole Structure of Electrostic Precipitator

The optimal design of whole structure of electrostic precipitator is a adjustable optimal problem of geometry and topology, which has larger scale and many design variables. On the basis of the work in 1], a theorem is established by taking full advantage of the structural property and using the concept of effective design variable for the large-sized and complex optimum design problem of structure. With the established theorem a feasible direction method named KFD can be obtained by not computing the partial derivatives of constrains and solving a linear programming. The method has the advantages of less space taken and fast convergence rate compared with the usual feasible direction method of e effective constrain. The results of a practical example show that the proposed method is quite efficient.