水中环肋圆锥壳振动特性分析  

Vibration of submerged and ring stiffened conical shells

作　　者：陈美霞[1] 邓乃旗 张聪[1] 魏建辉[1] 

机构地区：[1]华中科技大学船舶与海洋工程学院,武汉430074

出　　处：《振动与冲击》2014年第14期25-32,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(51179071);华中科技大学自主创新研究基金资助项目(2012QN056)

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。Flugge 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 using a smeared approach.The fluid loading of water was taken into account through dividing the shell into narrow strips which were considered to be equivalent cylindrical shells.The characteristics of natural vibration and forced vibration of the shells were analyzed.The numerical and analytical results are in good agreement.The influences of fluid loading,ring stiffeners,semi-cone angle and 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.

关 键 词：环肋圆锥壳 流体负载 幂级数法 刚度平摊法 

分 类 号：U661.44[交通运输工程—船舶及航道工程]