环向加肋对充液圆柱壳振动特性的影响分析（英文）

Effect of Stiffening Parameters on Vibration Characteristics of Fluid-filled Cylindrical Shells with Ring-stiffener

文章研究了环向加肋对充液圆柱壳耦合振动的影响。基于Love壳体理论,考虑壳体内部完全充液,采用波动法建立充液环肋圆柱壳耦合振动的频率特征方程,得到了不同边界条件下的耦合频率值。通过与已有文献数据对比,验证了文中研究方法的有效性和正确性。最后通过算例,分析了环肋参数对充液圆柱壳结构耦合振动的影响。结果表明,肋骨尺寸、数目的增加,对充液圆柱壳振动频率的提升影响明显,而内、外加肋形式所产生的影响则相对有限;肋骨对频率的影响主要表现在周向波数较大时;肋骨高度变化对耦合振动频率的影响更明显。

This paper investigates the effect of stiffening parameters on vibration of fluid-filled cylin-drical shells with ring-stiffener. Based on the Love’s shell theory and wave propagation approach, the shell eigenvalue governing equation is derived with the consideration of fluid property. Then the cou-pled frequency of the cylindrical shell with different boundary conditions is obtained. The present anal-ysis is validated by comparing results with those in the literature. The influences of stiffening param-eters on the coupled frequencies of fluid-filled cylindrical shells are illustrated by examples. Stiff-ener has considerable effects on the vibration with the increase of stiffener height and number, and relatively weak impact with stiffener forms. The effect of stiffeners on the frequencies have mainly man-ifested in the case of large circumferential wave numbers. The stiffener height shows comparatively better stiffened effect on vibration performance.