Zewu Wang
Associate Professor Supervisor of Master's Candidates
Gender:Male
Alma Mater:Huazhong University of Science and Technology
Degree:Doctoral Degree
School/Department:School of Chemical Machinery & Safety
Discipline:Chemical Process Equipment. Safety Science and Engineering
Business Address:H317,Building of Chemical Machinery
Contact Information:wangzewu@dlut.edu.cn
E-Mail:wangzewu@dlut.edu.cn
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Indexed by:期刊论文
Date of Publication:2019-04-15
Journal:化工机械
Volume:46
Issue:2
Page Number:173-177
ISSN No.:0254-6094
Key Words:油气管道;非线性振动;基频;外部激励;油气介质
Abstract:为了揭示外部激励、油气介质对管道非线性自由振动基频的影响规律,首先基于Euler-Bemoulli非线性几何方程和Hamilton原理,建立油气管道非线性动力学控制方程,然后通过伽辽金法和同伦撮动法,求得油气管道频幅关系、位移-时间曲线的一阶近似解和基频理论解.计算结果表明:推导的理论解与相关文献和实验数据相吻合.管道基频与外激励初始振幅正相关,与介质流速和密度负相关.过高的流体流速或密度易引起管道基频急剧降低.当有适当的扰力出现时,管道系统易发生较大受迫振动乃至共振失效.
