拱坝体型的动力自控制设计

Shape design of arch dams with dynamic self-control

以结构形式为控制变量 ,结构安全性和经济性等方面的要求为目标集 ,结构在动力时程中的最大能量响应为性能指标 ,建立了弹性动力结构的形式自控制模型 ,并提出了模型数值求解的离散 优化方法。然后建立了拱坝体型动力自控制设计的优化模型 ,并以溪洛渡拱坝为例 ,分别就允许集限制为抛物线、双曲线、椭圆、一般二次曲线、三心圆和对数螺旋线等六种坝型进行了数值求解 ,得到了各自的最佳控制体型。

A form self control model of elastic dynamic structure was set up,in which the structural form was the control variable,the safety and economy was the objective sets and the maximum energy response during dynamic process was the performance index.A discrete optimization method was presented for the numerical solution.An optimization model for the shape design of arch dams with dynamic self control was established.The numerical solution of the Xiluodu arch dam was computed,in which the optimal control shapes were calculated with different available sets of parabola, hyperbola,ellipse,general conic,circles of 3 centers and logarithm spire,respectively.Comparison showed the one with general conic was the best.