CAJ | 학술논문

有频率禁区的桁架结构优化设计是在结构保证静态强度的前提下，通过调整构件的截面或节点坐标来改变结构的动力特性，从而避开激振频率带宽。自适应协方差矩阵进化策略（CMA-ES）算法是一种寻优效率高、鲁棒性好的全局优化算法，对处理复杂的非线性多维度的优化问题有很好的适应性。在考虑工艺可行性的基础上，结合有限元分析软件，提出了基于CMA-ES算法的有频率禁区的桁架结构优化设计方法。算例研究表明，该方法是可行的，与传统优化方法、粒子群优化方法相比较，具有全局寻优性能好、效率高的优点。
유빈솔금구적항가결구우화설계시재결구보증정태강도적전제하，통과조정구건적절면혹절점좌표래개변결구적동력특성，종이피개격진빈솔대관。자괄응협방차구진진화책략（CMA-ES）산법시일충심우효솔고、로봉성호적전국우화산법，대처리복잡적비선성다유도적우화문제유흔호적괄응성。재고필공예가행성적기출상，결합유한원분석연건，제출료기우CMA-ES산법적유빈솔금구적항가결구우화설계방법。산례연구표명，해방법시가행적，여전통우화방법、입자군우화방법상비교，구유전국심우성능호、효솔고적우점。
For depart frequency bandwidth, the method is to adjust component sections or nodes’coordinates to change the dynamic characteristics on premise of static intensity being satisfied, so called optimization design of truss structure with frequency forbidden zone. Covariance Matrix Adaptation Evolution Strategy(CMA-ES), which is a global optimization algorithm with the advantages of high efficiency and robustness, has become a powerful tool for solving highly nonlinear multidimensional optimi-zation problems. Combining finite element method, an optimal method of truss structure with frequency forbidden zone based on CMA-ES algorithm is proposed. The results of examples show that the method is feasible and has the merits of excellent global optimization performance and efficiency compared with traditional and Particle Swarm Optimization(PSO)method.