非线性横摇阻尼的试验确定——数据处理方法  

Experimental Determination of Nonlinear Roll Damping: A Technique for Data Processing

作　　者：李远林[1] 伍晓榕[1] 

机构地区：[1]华南理工大学交通学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2002年第2期79-82,共4页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目 ( 10 0 72 0 2 1)

摘　　要：通过对规则波中和不规则波中横摇衰减试验以确定非线性横摇阻尼的数据分析 ,研究了对大幅横摇随机讯号采用随机减量法确定非线性阻尼方法的理论依据 .同时讨论了在处理试验数据时所面临的一些问题 .指出 ,随机减量法的测量精度极大地依赖于门槛值和分段的段数 ,对相对较短的试验记录 ,采用增加负门槛值使分段段数约可增大一倍 。The theoretical basis to estimate nonlinear roll damping with the random decrement method is investigated by analyzing the test data of a model ship rolling in regular and irregular waves, and problems arising from the data processing are discussed. It is found that the measuring precision of the random decrement method greatly depends on the value of the threshold and segment number. For a relative short data record, the number of segments can be doubled by adding minus value of the threshold. The analyzed results can be improved.

关 键 词：非线性横摇阻尼 随机减量法 船舶运动 横摇衰减试验 数据处理 数值滤波 

分 类 号：U661.32[交通运输工程—船舶及航道工程]