【作者】 张扬； 沈家荫；

【Author】 Zhang Yang Shen Jiayin (He Hai University)

【机构】 河海大学；

【摘要】 本文借助边界元法对大型复杂结构进行了形状优化设计,采用的优化方法是改进的复形法。由于应力约束是非线性隐式约束,顶点的应力约束条件检验很困难,故在优化过程中考虑将应力作近似线性展开。据此,对某个混凝土重力坝坝型进行了二维形状优化设计,优化结果表明可节省混凝土量20%多。更多还原

【Abstract】 In this paper,the optimization of the shape of structures is discussed,by means of boundary element method(BEM) combining with improved complex method.Because the stress constraints are nonlinear and implicit,it is not easy to check the top point to see if the stress constraints are satisfied.This difficulty can be overcome by the consideration of the stress linear expansion.The twodimensional optimization of some one gravity dam has been done and the optimal result shows that 20 percent of the concrete volume can be saved.更多还原