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本文首先叙述用两种方法(倾角变位法和角变位移法)分析水电站厂房的自振特性。再用实验结果进行校核验定。结果表明:倾角变位法不如角变位移法。物理推理也可知其正确性,前法忽略了各杆件的轴向变形,即忽略了竖向振动特性。模型实验结果证实了这个论点。依此,本文提出了一种简便易行的分析方法用来确定水电站厂房的自振特性。
This paper first describes the use of two methods (tilt angle change method and angular displacement method) to analyze the natural vibration characteristics of a hydropower plant. Then use the experimental results for verification. The results show that the tilt angle displacement method is not as good as the angular displacement method. Physical reasoning is also known for its correctness. The former method ignores the axial deformation of each member, that is, ignores the vertical vibration characteristic. Model experimental results confirm this argument. Therefore, this paper presents a simple and easy analysis method to determine the natural vibration characteristics of a hydropower plant.