非线性载荷对船中弯矩响应影响  

Influence of load nonlinearity on bent moment response of amidship

作　　者：朱克强[1] 蔡瑛[1] 于春令[1] 张玉松[1] 马小方[1] 郑道昌[1] 徐庭留[1] 秦道武[1] 

机构地区：[1]宁波大学海运学院,浙江宁波315211

出　　处：《海洋工程》2011年第4期130-134,共5页The Ocean Engineering

基　　金：长江学者和创新团队发展计划资助项目(IRT0734);国家自然科学基金资助项目(10872098;10572063)

摘　　要：给出舰船结构水弹性分析的通用公式,分析典型高速船的水弹性响应,将总响应分为线性和非线性,前者用线性势流理论计算,后者用船体—流体系统脉冲响应函数的卷积积分和水动力非线性修正得到。计算表明线性解答过高地估计了共振点刚体运动,从而导致弯矩预报不准确,而非线性模拟的中拱/垂弯矩均与实验吻合较好。Hydroelasticity analysis formula of ship structure is presented.Hydroelasticity response of a representative high speed ship is analysed.Overall response is devided into linear and nonlinear ones.The former is calculated with linear potential fluid theory and the latter is obtained by hull-fluid system impulse response function wrap integral and hydrodynamic nonlinear modification.Calculation shows that linear solution overestimates rigid body movement near resonance point,thereby bringing on unallowable bent moment prediction,and that nonlinear simulation hogging/sagging bent moment is in good agreement with the experiment.

关 键 词：船舶 非线性 水弹性响应 势流理论 

分 类 号：U675.92[交通运输工程—船舶及航道工程] O312[交通运输工程—船舶与海洋工程]