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根据描述弯管自由振动的解析表达式 ,对夹角为 135°两端固支的螺旋管扇形结构进行自由振动分析 .通过给出振型函数和相应的边界条件 ,半解析地确定了螺旋管扇形结构的各阶频率和振型 .将所得结果与Chen的实验数据相比较 ,二者符合较一致 .
According to the analytic expression describing the free vibration of the elbow, the free vibration analysis of the serpentine fan with the included angle of 135 ° is carried out. By giving the shape function and the corresponding boundary conditions, The frequency and mode shapes of the fan-shaped structures are compared with the experimental data of Chen, which accord with the more consistent.