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基于精细时程积分的输电塔风振响应下的拓扑优化

Keywords: 特高压输电塔,拓扑优化,精细时程积分法,风振响应,自适应遗传算法

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Abstract:

为了解决输电塔的动力优化问题,提出了基于精细时程积分法的动力拓扑优化方法.以某特高压输电塔为实例,建立了输电塔在模拟风作用下的运动方程,并采用精细时程积分法求得风振响应.以求得的动力响应约束为条件,运用遗传算法对输电塔进行了拓扑优化,即对输电塔的截面尺寸、根开和塔身拓扑构型进行优化,并考虑截面、根开和构型耦合因素,运用Matlab编程实现了输电塔杆件布置最优,结构优化后用钢量减少了7.81%.该方法既保证了输电塔结构的安全性,又降低了输电塔的用钢量.

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