摘要
前文分别介绍了二阶非线性水弹性分析中流体非线性的理论与部分典型算例结果。本文则在流体线性假定的前提下,介绍结构非线性的考虑方法。以大变形浮动平板在多向规则波中的运动与变形响应为例,介绍了板垂向位移与流体相互耦合的频域分析方法。讨论了板内薄膜力对结构变形与受力的影响。数值算例表明,薄膜力对变形、弯矩和应力都有一定程度的非线性贡献,在某些情况下是不可忽略的。
The theory and typical numerical results of a second order nonlinear hydroelastic analyses of floating bodies were presented in a series of papers[1-3] in which only nonlinearity in fluids was considered. Under the assumption of linear fluid, the hydroelastic analysis methods of nonlinear structure were introduced in this paper. With the examples of the motion and displacement responses of a floating plate undergoing large vertical deflections in multidirectional waves, the analysis method of the couple action between the vertical displacement and the fluid were presented in the frequency domain. The influence of the membrane forces to the vertical displacements, bending moments and the stress were discussed. The numerical results indicate that the membrane forces have influence on the vertical displacement, bending moments and stresses, and can not be neglected in some cases.
出处
《船舶力学》
EI
2003年第5期81-90,共10页
Journal of Ship Mechanics
基金
国家自然科学基金(50039010)
中国博士后基金
关键词
海洋浮体
结构非线性
水弹性
力学分析
频域分析方法
大挠度
Bending moments
Deflection (structures)
Membranes
Nonlinear systems
Plates (structural components)
