| 复杂预应力对立管参激振动特性的影响分析 |
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| 引用本文： | 王威,陈炉云.复杂预应力对立管参激振动特性的影响分析[J].船舶力学,2018,22(2):214-223. |
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| 作者姓名： | 王威 陈炉云 |
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| 作者单位： | 中国舰船研究设计中心,武汉,430064;上海交通大学 海洋工程国家重点实验室,上海,200240 |
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| 基金项目： | 海洋工程国家重点实验室基金资助项目(1507) |
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| 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。
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| 关 键 词： | 立管 复杂预应力 参激振动 动力特性 |
Influence analysis of complex pre-stress on dynamic characteristics for riser under parametric excitations |
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| WANG Wei,CHEN Lu-yun.Influence analysis of complex pre-stress on dynamic characteristics for riser under parametric excitations[J].Journal of Ship Mechanics,2018,22(2):214-223. |
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| Authors: | WANG Wei CHEN Lu-yun |
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| Abstract: | 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 influ-ence with complex pre-stress force distribution on riser structure are derived, and a novel approach to an-alyze 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. |
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