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冰致直立结构自激振动理论与实验研究

发表时间:2009-03-15  浏览量:1698  下载量:712
全部作者: 郭峰玮,岳前进
作者单位: 大连理工大学工程力学系
摘 要: 对冰致直立结构振动问题的两种理论模型——强迫振动和自激振动进行了讨论。通过数据分析,证明了渤海辽东湾平台上观测到的冰致直立结构稳态振动以及频率锁定现象应该属于自激振动。经过进一步分析,给出冰致自激振动的机理解释,并建立冰致自激振动方程的框架,利用监测数据建立方程实例,对方程进行了相平面分析。为进一步验证和完善理论模型,设计建造室内实验系统,取得了很好的实验效果。
关 键 词: 工程力学;自激振动;冰致振动;物理机制;动力方程;模型实验
Title: Theoretical model and experiment on ice induced self excited vibration of vertical structures
Author: GUO Fengwei, YUE Qianjin
Organization: Department of Engineering Mechanics, Dalian University of Technology
Abstract: The two theoretical models on ice induced vibration of vertical structures: forced vibration and self excited vibration are discussed. By data analysis, the steady state vibration and frequency lock-in in phenomenon observed in Bohai Bay is proved to be self excited vibration. By further analysis, the mechanism of ice induced self excited vibration is presented, and frame of the dynamic equation is established. An example of the equation is given according to field data, phase plane analysis of the example is conducted. For verification of the theoretical model, some model tests were performed and satisfactory test result was obtained.
Key words: engineering mechanics; self excited vibration; ice induced vibration; physical mechanism; dynamic equation; model test
发表期数: 2009年3月第5期
引用格式: 郭峰玮,岳前进. 冰致直立结构自激振动理论与实验研究[J]. 中国科技论文在线精品论文,2009,2(5):450-455.
 
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