船体弯扭耦合振动计算研究  

Research on Analysis of Bending-torsion-coupled Vibration of Ship Hulls

作　　者：黎胜[1] 赵德有[1] 郭昌捷[1] 

机构地区：[1]大连理工大学

出　　处：《中国造船》2000年第2期72-77,共6页Shipbuilding of China

摘　　要：基于 Timoshenko梁理论和 Benscoter理论 ,建立了分析船体结构弯扭耦合振动的薄壁梁有限元模型。该模型能考虑翘曲和剪切变形的影响 ,能精确描述船体薄壁梁的纯弯状态和非均匀扭转 ,适用于任何形状的船体横剖面。重点讨论了翘曲位移协调问题 ,提出了新的船体不同剖面形式梁段间的翘曲位移协调方法。本文还讨论了船体薄壁梁计算模型的简化问题。A finite element model of thin walled beam based on Timoshenko′s beam and Benscoter theories for analysis of the coupled torsional bending vibration of ship hulls is presented. The present model takes into accounts both shear and warping deformations, can exactly model the pure bending and the non uniform torsion of beams, and is valid for arbitrary cross sections of ship girders. Special emphasis is laid on compatibility condition of warping deformation of this model. A new method to assure compatibility of warping deformation between two adjacent beam elements with different cross sections of a ship hull is proposed. The method to simplify the thin walled beam model of ship hulls is also considered. Numerical examples demonstrate the accuracy of the proposed analysis methods.

关 键 词：船体梁 弯扭耦合振动 翘曲位移协调 有限元法 

分 类 号：U661.44[交通运输工程—船舶及航道工程]