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以输电塔气弹模型为试验对象,基于非接触式精密位移测量系统,在风洞中测量了不同风向、风速下输电塔的位移响应。采用荷载响应相关法,建立了基于输电塔气弹模型位移响应的等效静风荷载试验分析方法。结果表明:输电塔在两轴向的风振响应均以一阶模态为主,且顺风向的脉动响应要大于横风向;计算得到的输电塔顺风向等效荷载要远大于横风向,且顺风向等效荷载中平均量占优,背景次之,共振不显著;对比分析显示,该文所建立的输电塔等效静风荷载试验分析方法合理、有效。
Based on the non-contact precision displacement measurement system, the tower’s aeroelastic model is used as the test object to measure the displacement response of the transmission tower under different wind directions and wind speeds in a wind tunnel. Based on the load response correlation method, an equivalent static wind load test and analysis method based on the displacement response of the aeroelastic model of transmission tower was established. The results show that the first-order modes of the wind-induced vibration responses of transmission towers in both axial directions are dominant and the response of the downwind windward is greater than that of the transverse wind direction. The calculated forward wind equivalent load of the transmission tower is much larger than that of the transverse wind direction The mean value of the downwind equivalent load is dominant, followed by the background, and the resonance is not significant. The comparative analysis shows that the equivalent static wind load test analysis method established in this paper is reasonable and effective.