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采用子结构点导纳方法分析铺壳耦合结构振动特性时,需要将衔接线划分为一系列的点进行求解,较为烦琐。针对这一问题,该文提出了改进的子结构线导纳方法。首先建立了铺板和圆柱壳的耦合振动模型;然后采用模态展开法分别求解铺板和圆柱壳的机械线导纳,得到振动传递方程中的线导纳矩阵;最后求解耦合振动方程分析铺板与圆柱壳的振动功率流特性。将结果分别与ANSYS和AutoSEA的计算结果进行对比分析表明:该文提出的改进方法能够在宽频带内有效地计算板壳耦合结构的振动功率流特性,且求解过程简单,适于线衔接复杂结构的振动特性分析。
When using sub-structure point admittance method to analyze the vibration characteristics of the pavement coupling structure, it is necessary to divide the connecting line into a series of points to solve, which is more cumbersome. In response to this problem, this paper proposes an improved substructure linear admittance method. Firstly, the coupled vibration model of the decking and the cylindrical shell is established. Then, the mechanical admittance of the decking and the cylindrical shell is solved by using the modal expansion method to obtain the linear admittance matrix in the vibration transfer equation. Finally, the coupling vibration equation is analyzed for the decking and the cylindrical Vibration power flow characteristics of the shell. Comparing the results with the results of ANSYS and AutoSEA, respectively, the results show that the improved method proposed in this paper can effectively calculate the vibration power flow characteristics of the plate-shell coupling structure in a wide frequency band and the solution process is simple. Vibration characteristics analysis.