大跨越输电铁塔随机风场的数值模拟  

Simulation of Stochastic Wind Field on Long-span Transmission Tower

作　　者：王炎[1] 

机构地区：[1]湖北第二师范学院建筑与材料工程系,武汉430205

出　　处：《国外建材科技》2007年第4期111-113,132,共4页Science and Technology of Overseas Building Materials

摘　　要：风荷载是输电铁塔的主要动力荷载之一,设计中必须考虑风荷载的动力效应。文中提供了大跨输电铁塔随机风场数值模拟的谐波合成法,考虑了不同位置上的空间相关性和相位角,同时在模拟中采用了FFT技术,从而简化了计算过程,提高了运算效率。最后,使用该方法模拟生成了一大跨度输电铁塔随机风场的样本,并对该风场样本进行了谱和相关性校验,模拟值与目标值吻合良好,证明了该方法的有效性和可靠性。Wind load is one of the major dynamic loads on transmission tower. It should be considered in the design. This paper provides the harmony superposition method to simulate the stochastic wind field of a long-span transmission tower. The space dependency and the phase angle are considered on different positions. And the FFT technique is adopted, so the simulation can be easy and efficiently performed. At last, According to this method, a stochastic wind field on the long-span transmission tower is simulated. In a spectrum comparison, it is found that the correlation functions of the simulated wind field agree well with the target correlation functions. So it is proved the method presented in this paper is valid and reliable.

关 键 词：大跨越输电铁塔 随机风场 模拟 谐波叠加法 

分 类 号：TU312.1[建筑科学—结构工程]