随机波浪下ROV缆索动力响应无因次分析  

Non-dimensional dynamic response of ROV system under excitation of random wave

作　　者：黄柱林[1] 姚宝恒[1] 曾铮[1] 

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200240

出　　处：《舰船科学技术》2016年第8期43-46,共4页Ship Science and Technology

基　　金：国家自然科学基金资助项目(51279107)

摘　　要：建立ROV作业系统垂向一维动力学模型,研究随机波浪激励下的动态响应。利用振动理论对方程无因次处理,得到阻尼比和频率比与响应关系的微分方程。采用双参数的PM波谱作为波浪函数,并对其无因次化。运用龙格库塔法对随机波浪和运动方程进行求解,得到缆索最大张力与各参数的关系,并分析缆索出现松弛的情况,并与谐波激励的响应作对比。结果表明,随机激励下,缆索的最大张力在频域出现多个峰值,在频率很大的范围内保持较大的张力,但峰值张力小于谐波激励的峰值。Develop a single-degree-of-freedom model for the cable-body system to analyze the dynamic response. By making the differential equation non-dimensional, the relation between excitation and drag coefficient with the response is analyzed. Non-dimensional PM Spectnnn with dual parameter is used as the excitation. The differential equation is solved by using Runge-Kutta iterative algorithm to get relation between the largest tension and parameters above. These results are compared with the response under harmonic excitation. Results show that the largest tension has multiple peak values, and maintains at a high level for a wide range, while the peak tension of cable is smaller than the response under harmonic excitation.

关 键 词：缆索 动力响应 无因次 随机波浪 

分 类 号：U661.4[交通运输工程—船舶及航道工程]