摘要
研究桁架桥梁结构在地震作用下以较少的作动器达到最优控震效果,提出了采用遗传算法对桁架桥梁结构抗震作动器进行优化布置的最优控震策略.通过建立桁架桥梁结构有限元模型,利用遗传算法对结构进行了优化,得到了相对最优的作动器数量和相应位置.利用传统二次型最优控制算法计算出抗震作动器的最优控制力.通过实例模拟了多种地震输入情况下桁架桥梁的动态响应.仿真结果表明:应用遗传算法对钢桁架桥梁结构中作动器进行优化配置后,结构的控震效果优于作动器随机布置方式.钢桁架桥梁结构控震效果随遗传代数增加而显著增强.
In order to achieve the optimal control effect with less actuators under earthquake action, the optimal control strategy of optimal layout of actuators on the truss bridge structure with the genetic algorithm is proposed. By establishing the finite element model of the truss bridge structure, the structure is optimized by genetic algorithm, and the relative optimal number of actuators and the corresponding positions are obtained. The optimal control force of the earthquake resistant actuator is calculated using the linear quadratic optimal control algorithm. The dynamic response of the truss bridge is simulated by an example. The simulation results show. After using genetic algorithm to optimize actuators on the structure of steel truss bridge, the vibration control effect of the structure is better than that of the random arrangement. The effect of vibration control of steel truss bridge is significantly enhanced with the increase of genetic algebra.
出处
《西安工业大学学报》
CAS
2015年第10期807-813,共7页
Journal of Xi’an Technological University
基金
国家自然科学基金(51178388)
陕西省工业攻关项目(2013K07-07)
陕西省教育厅专项科研计划项目(2013JK0612)
西部地区人才培养特别项目(201208615016)
西安工业大学校长基金重点项目(XAGDXJJ0919)
西安工业大学青年英才项目
关键词
桁架桥梁
二次型最优控制
作动器
遗传算法
truss bridge structure
linear quadratic optimal control
actuator
genetic algorithm
