双层柱壳的流固耦合模态计算与试验研究

采用结构有限元和内域流体有限元的流固耦合计算方法,对球壳及其内域流体进行有限元离散计算,并将计算所得的模态振动频率与理论结果进行了比较.采用同样的方法,进一步对加筋双层圆柱壳进行了流固耦合的复特征值分析,并求解了其固有频率和振型.试验分别对双层柱壳充水和不充水情况下模态和模态频率进行了测量,结果证实了数值计算方法的正确性.

Computation and measurement of double shell vibration mode with fluid load

An approach to combining structure finite element with interior fluid element methods was proposed to calculate the natural frequency of the sphere shell with interior fluid loading effects.The numerical results were shown to be in good agreement with the theoretical solution.The eigenvalues and shape modes of double cylinder shell,with and without fluid load,were obtained by using the same finite element approach.The numerical results were compared with the experiment data,which proved the validity of the ...