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采用弹性悬挂装置制作了三向风雨天平,并利用其进行了模拟降雨冲击力试验。实测了不同降雨强度、不同雨滴下落高度对结构的冲击力,研究了降雨对结构的平均冲击力和脉动冲击力与雨强、雨滴降落高度的关系。研究表明:降雨对结构产生平均冲击力和脉动冲击力。平均冲击力与雨强成正比,随雨滴降落的高度增加先增大,后减小。在强降雨时,脉动冲击力均方根值与降雨强度成线性关系,其主频率与结构固有频率一致。因此,研究在不同降雨强度下的力学性能具有重要意义。
The three-way wind and rain balance was made by using the elastic suspension device, and the simulated rainfall impact test was carried out. The impact of different rainfall intensity and different drop height on the structure was measured. The relationship between the average impact force of rainfall on structure and the pulsating impact force and the rainfall intensity and the landing height of raindrops was studied. The research shows that rainfall has an average impact and a pulsating impact on the structure. The average impact force is proportional to the rainfall intensity, and increases with the increase of raindrops first and then decreases. In strong rainfall, the rms value of pulsating impact force is linear with the rainfall intensity, and its main frequency is consistent with the natural frequency of the structure. Therefore, it is of great importance to study the mechanical properties under different rainfall intensities.