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桁架结构尺寸和形状、拓扑的渐进优化方法 被引量:8
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作者 刘涛 邓子辰 《西北工业大学学报》 EI CAS CSCD 北大核心 2004年第6期739-743,共5页
提出了一种求解桁架结构尺寸 ,形状和拓扑组合优化的渐进优化方法。将优化问题分解为拓扑优化和尺寸、形状优化两个子问题分层求解。通过连续化的拓扑变量和近似方法构造了拓扑变量灵敏度系数计算式 ,由拓扑变量灵敏度系数识别和删除杆... 提出了一种求解桁架结构尺寸 ,形状和拓扑组合优化的渐进优化方法。将优化问题分解为拓扑优化和尺寸、形状优化两个子问题分层求解。通过连续化的拓扑变量和近似方法构造了拓扑变量灵敏度系数计算式 ,由拓扑变量灵敏度系数识别和删除杆件单元。结构尺寸、形状优化采用准则法和渐进移点法的组合方法。分层优化时 ,在桁架中加上所有可能的杆件 ,先进行尺寸、形状优化 ,再进行拓扑优化 ,随后二者交替进行迭代 ,迭代过程的结构重量最小值即为最优解。算例表明了文中方法的有效性 。 展开更多
关键词 拓扑优化 尺寸、形状优化 桁架结构
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INTEGRATION SHAPE AND SIZING OPTIMIZATION OF COMPOSITE WING STRUCTURE BASED ON RESPONSE SURFACE METHOD 被引量:7
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作者 王伟 杨伟 常楠 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2008年第2期94-100,共7页
An effective optimization method for the shape/sizing design of composite wing structures is presented with satisfying weight-cutting results. After decoupling, a kind of two-layer cycled optimization strategy suitabl... An effective optimization method for the shape/sizing design of composite wing structures is presented with satisfying weight-cutting results. After decoupling, a kind of two-layer cycled optimization strategy suitable for these integrated shape/sizing optimization is obtained. The uniform design method is used to provide sample points, and approximation models for shape design variables. And the results of sizing optimization are construct- ed with the quadratic response surface method (QRSM). The complex method based on QRSM is used to opti- mize the shape design variables and the criteria method is adopted to optimize the sizing design variables. Compared with the conventional method, the proposed algorithm is more effective and feasible for solving complex composite optimization problems and has good efficiency in weight cutting. 展开更多
关键词 composite structures shape optimization WINGS sizing optimization response surface method
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