随机波浪下ROV缆索动力响应无因次分析

发布时间：2017-12-31 01:28

本文关键词：随机波浪下ROV缆索动力响应无因次分析　出处：《舰船科学技术》2016年15期 　论文类型：期刊论文

【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。
[Abstract]:The vertical one-dimensional dynamic model of ROV operating system is established to study the dynamic response under random wave excitation. The equation is treated dimensionless by vibration theory. The differential equation of the relation between damping ratio and frequency ratio and response is obtained. The two-parameter PM spectrum is used as wave function, and the dimensionless wave spectrum is dimensionless. The Runge-Kutta method is used to solve the stochastic wave and motion equations. The relationship between the maximum tension of the cable and the parameters is obtained, and the relaxation of the cable is analyzed and compared with the response of harmonic excitation. The results show that the maximum tension of the cable appears multiple peaks in frequency domain under random excitation. A large tension is maintained in a wide range of frequencies, but the peak tension is smaller than that of harmonic excitation.
【作者单位】：上海交通大学海洋工程国家重点实验室;
【基金】：国家自然科学基金资助项目(51279107)
【分类号】：U674.941
【正文快照】： 随着海洋资源开发和海洋科学的不断发展,深海无人遥控潜水器(ROV)的应用越来越广泛,在深海作业过程中由于缆索断裂导致ROV丢失的现象时有发生。母船随海面波浪做升沉运动,在一定的海况条件下,导致缆索张紧松弛状态交替出现,从而产生瞬时张力过大的情况,因而分析导致缆索张力过

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