Influence of Rib Strengthening on Structure Vibration and Sound Radiation of Cylindrical Shell
Influence of Rib Strengthening on Structure Vibration and Sound Radiation of Cylindrical Shell
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DOI：
10.4028/www.scientific.net/amm.226-228.359
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发表时间：
2012-11
期刊：
影响因子：
--
通讯作者：
Han Zheng;Qi Dou Zhou;Gang Ji
中科院分区：
文献类型：
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作者：
Han Zheng;Qi Dou Zhou;Gang Ji
采用有限元法和边界元法相结合的方法计算了水下圆柱壳的结构振动和声辐射。用FORTRAN程序计算附加质量和附加阻尼矩阵，用DMAP程序将附加质量和附加阻尼矩阵与结构质量和阻尼矩阵相加，解决了流固耦合问题。通过对不同加劲肋转动惯量的环肋圆柱壳的均方法向速度级和声辐射功率级的比较，得出随着转动惯量的增大，频率响应曲线的峰值频率增大，振动和声辐射峰值减小。加强筋条数对结构的峰值频率和转动惯量有相同的影响，但对峰值频率没有影响。
An approach combining FEM with BEM is adopted to calculate the structural vibration and sound radiation of an underwater cylindrical shell. By using FORTRAN codes to compute the added mass and added damping matrices, DMAP codes to add them to structural mass and damping matrices, the problem of fluid-structural interaction was solved. Through comparing the mean square normal velocity level and sound radiation power level of ring-stiffened cylindrical shell with different inertia moment of stiffeners, the results can be acquired: with the moment of inertia gets bigger, the peak frequency of the frequency-response curves increases while the peak value of vibration and sound radiation decreases. The number of strengthened stiffeners has the same effect on peak frequency as the moment of inertia, but has no effect on peak value.