船舶气囊下水船体梁的结构计算方法  

Ship's hull gilder's structure calculation in the launching by the gasbags

作　　者：刘宏亮[1] 夏利娟[1] 余龙[1] 

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200240

出　　处：《舰船科学技术》2013年第4期20-24,共5页Ship Science and Technology

基　　金：国家自然科学基金资助项目(50909060);国家自然科学基金资助项目(51009090);海洋工程国家重点实验室青年创新基金资助

摘　　要：根据船舶气囊下水的特点建立船体梁的结构计算模型;分析气囊的受力特性,结合能量守恒推导出适用于不同直径气囊工作高度H的求解方程,在此基础上求解气囊等效成弹性支座的非线性弹性系数k;将k表示为位移的非线性函数代入等效节点力矩阵,结合刚度矩阵、位移矩阵求解平衡方程,推导出船体梁弯曲应力的求解表达式。最后通过理论值与实验测量值的对比,验证了本文模型求解的可行性。本文的研究成果对气囊下水过程中船体结构的应力评估具有较强的实用价值。According to the characteristic of the launching by gasbag establish the ship＇s hull structure calculation model. Analyzing the mechanical character of the gasbag, combining to the energy conservation deduce the gasbag＇s working height＇s calculation formula which is suit for any gasbag, then calculate the gasbag＇s equivalent non-linear elastic coefficient k based on the H. Associating with the non- linear formula of k,the balance formula which consist with the stiffness matrix, displacement matrix and the force matrix can be solved,so,the hull＇s bend stress can be calculated. Comparing the theoretical solve with the measured value to verify the solution of the FEM structure calculation model,looking forward to providing certain reference to the launching＇s structure calculation.

关 键 词：气囊下水 能量法 气囊工作高度 非线性弹性系数 

分 类 号：U661.4[交通运输工程—船舶及航道工程]