摘要
研究深海顶张力立管(TTR)的固有振动特性。通过考虑两种不同的分析模型,研究沿水深变化的轴力以及张紧环运动对于立管固有振动频率和振型的影响。考虑立管顶端动边界条件及立管轴力随水深变化,提出了计算深水顶张力立管固有振动频率的方法,给出考虑浮体升沉及张紧环运动时顶张力立管的固有振动特性。结果表明,考虑变轴力和张紧环的影响是计算立管固有频率需要考虑的;立管浮体的运动,导致立管频率显著变化,从而改变立管的共振特性。
The natural vibration characteristics of the top-tensioned riser are investigated in this paper.The riser′s natural vibration frequencies and modes are studied considering the effects of axial force varying with water-depth and tension-ring′s motion with two diffrent riser models.The method of calculating the riser′s natural frequency is proposed considering the top-moving boundary condition and the axial force varying with water-depth.The natural vibration characteristics of TTR are obtained considering platform heave and tension-ring′s motion.
出处
《海洋工程》
CSCD
北大核心
2012年第2期8-13,共6页
The Ocean Engineering
基金
国家自然科学基金项目(51079097)
关键词
顶张力立管
振动频率
张紧环
张紧器
top-tensioned-riser
vibration frequency
tension-ring
tensioner
