一、引言结构优化设计问题的求解,主要有以下几种方法:(1) 简单解法。当只有一个或两个设计变量时,可采用简单解法。一种是图解法,如第一讲图1-2所示;另一种是解析方法,常用的是拉氏乘子法。(2) 准则法。从工程观点出发,提出结构达到最优设计时应满足的一个准则,然后用力学方法求出满足 First, the introduction Structural optimization design solution, there are several ways: (1) simple solution. When there is only one or two design variables, a simple solution can be used. One is the graphical method, as shown in Figure 1-2, the first one; the other is the analytical method, commonly used is the Laski multiplier method. (2) Guidelines. From the engineering point of view, we propose a criterion that should be satisfied when the structure reaches its optimal design, and then find out by gravitation