摘要
针对立管结构中存在着复杂预应力分布的现象,提出了立管在只考虑顶端平台升沉激励引起的纯参激振动问题。基于结构预应力理论,建立了含复杂预应力的立管结构运动控制微分方程,提出了一种可适用于含复杂预应力分布的立管参激振动特性分析方法。以此为基础,应用数值计算对比了复杂预应力对立管结构的自然频率、振型等振动特性的影响。计算结果表明,复杂预应力的存在对立管结构的动力特性有着重要的影响。
The problem of pure parametric vibration of marine riser structure with complex pre-stress force distribution is proposed. According to the structure pre-stress theory, the differential equations of the influence with complex pre-stress force distribution on riser structure are derived, and a novel approach to analyze the dynamic characteristics of riser structure with complex stress distribution is proposed. In addition,numerical results are carried out to compare the influence of pre-stress on structure natural frequency and structure modal. The result shows that the distribution of complex pre-stress force has a significant influence on the riser structural dynamic characteristics.
出处
《船舶力学》
EI
CSCD
北大核心
2018年第2期214-223,共10页
Journal of Ship Mechanics
基金
海洋工程国家重点实验室基金资助项目(1507)
关键词
院立管
复杂预应力
参激振动
动力特性
marine riser
complex pre-stress
parametric vibration
dynamic characteristics
