风载对某传输塔影响的研究

Study of Wind Effects on a Transmission Tower

首先通过MARC软件建立传输塔模型,并对其进行模态分析,求出结构的基本自振周期;然后,利用MARC软件求出传输塔在只承受自重和电缆载荷情况下的应力和位移,并找出危险点;最后,将传输塔分层,根据风载荷的计算机理和有限元理论,用MARC软件对传输塔在各级风载荷作用下的情况进行静力分析。根据应力、变形情况观察危险点,并将在各级风载作用下的结果与无风载荷时进行比较,得出结论。

Firstly, a model of the tower is established with the software of MARC and analyzed by dynamic model analyzing, and the natural frequencys of the tower are obtained. Secondly, MARC software was used to obtain stress and displacement of transmission tower under the load of only dead weight and cables, and to find the identify risk point. Finally, transmission tower was layered, according to the wind load theory and finite element theory, and the MARC software was made use of obtaining the static analysis of transmission tower at all levels of wind load. The risk point was observed through the stress and deformation. Every point at all levels under the wind with no wind load are compared.