水中环肋圆锥壳振动特性分析

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (14) : 25-32.

论文

水中环肋圆锥壳振动特性分析

陈美霞，邓乃旗，张聪，魏建辉

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Vibration of submerged and ring stiffened conical shells

CHEN Mei-xia，DENG Nai-qi，ZHANG Cong，WEI Jian-hui

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摘要

基于Flügge壳体理论，采用幂级数法研究不同边界条件下水中环肋圆锥壳振动特性。环肋采用刚度各向异性法，平摊等效为壳体重量的增加。通过将圆锥壳分段，且将每段圆锥壳等效为圆柱壳考虑水流体的负载影响。分析水中环肋圆锥壳的固有、受迫振动特性，并通过数值与解析结果对比，验证幂级数法的正确性。研究流体负载、环肋、半锥角及边界条件对其振动特性影响。结果表明，流体负载与环肋主要以附加质量及阻尼形式作用于锥壳。

Abstract

Flügge equations of motion and power series solution were used to study the vibrational characteristics of submerged and ring stiffened conical shells. The ring stiffeners were modeled by a smeared approach. Fluid loading of water was taken into account by dividing the shell into narrow strips which were considered to be locally cylindrical shell. The characteristics of natural vibration and forced vibration of the shells were analyzed. Numerical and analytical results are in good agreement. The influence of fluid loading and ring stiffeners and semi-cone angle and the boundary conditions on vibrational characteristics of shells were studied. The results show that the fluid loading and ring stiffeners affect as added mass and damping on conical shells.

导出引用

陈美霞;邓乃旗;张聪;魏建辉. 水中环肋圆锥壳振动特性分析[J]. 振动与冲击, 2014, 33(14): 25-32

CHEN Mei-xia;DENG Nai-qi;ZHANG Cong;WEI Jian-hui. Vibration of submerged and ring stiffened conical shells[J]. Journal of Vibration and Shock, 2014, 33(14): 25-32