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CLC number: O327; TB633; U663.2

On-line Access: 2016-04-05

Received: 2015-06-27

Revision Accepted: 2015-10-19

Crosschecked: 2016-03-10

Cited: 2

Clicked: 1761

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Dong Tang

http://orcid.org/0000-0003-4586-5609

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Journal of Zhejiang University SCIENCE A 2016 Vol.17 No.4 P.295-316

http://doi.org/10.1631/jzus.A1500191


Exact free vibration analysis of open circular cylindrical shells by the method of reverberation-ray matrix


Author(s):  Xiong-liang Yao, Dong Tang, Fu-zhen Pang, Shuo Li

Affiliation(s):  College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China

Corresponding email(s):   tangdong@hrbeu.edu.cn, pangfuzhen@hrbeu.edu.cn

Key Words:  Open circular cylindrical shell, Method of reverberation-ray matrix, Free vibration analysis, Donnell-Mushtari-Vlasov thin shell theory, Analytical wave form solution


Xiong-liang Yao, Dong Tang, Fu-zhen Pang, Shuo Li. Exact free vibration analysis of open circular cylindrical shells by the method of reverberation-ray matrix[J]. Journal of Zhejiang University Science A, 2016, 17(4): 295-316.

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Abstract: 
This paper is concerned with the free vibration analysis of open circular cylindrical shells with either the two straight edges or the two curved edges simply supported and the remaining two edges supported by arbitrary classical boundary conditions. Based on the donnell-Mushtari-Vlasov thin shell theory, an analytical solution of the traveling wave form along the simply supported edges and the modal wave form along the remaining two edges is obtained. With such a unidirectional traveling wave form solution, the method of the reverberation-ray matrix is introduced to derive the equation of natural frequencies of the shell with different classical boundary conditions. The exact solutions for natural frequencies of the open circular cylindrical shell are obtained with the employment of a golden section search algorithm. The calculation results are compared with those obtained by the finite element method and the methods in the available literature. The influence of length, thickness, radius, included angle, and the boundary conditions of the open circular cylindrical shell on the natural frequencies is investigated. The exact calculation results can be used as benchmark values for researchers to check their numerical methods and for engineers to design structures with thin shell components.

This is a pretty nice work on free vibration analysis of OCCSs using the method of reverberation-ray matrix (MRRM). All the formulations are derived correctly, which are further validated through numerical comparison.

开口圆柱壳的回传射线矩阵法精确自由振动分析

目的:开口圆柱壳作为板壳组合结构的组成部分被广泛应用于工程实践中。本文探讨开口圆柱壳结构参数(长度、半径、厚度和夹角等)和边界条件对其振动特性的影响,这对工程结构的减振设计具有重要意义。通过推导开口圆柱壳的解析解及其求解过程,建立加筋开口圆柱壳和板-壳耦合模型振动分析的理论基础。
创新点:1. 推导行波与驻波结合形式的解析解;2. 建立回传射线矩阵法分析开口圆柱壳结构振动的流程;3. 分析得到大模态数下开口圆柱壳固有频率随壳厚线性变化;直边简支时,曲边边界条件对固有频率影响不大。
方法:1. 基于Donnell-Mushtari-Vlasov (DMV)薄壳理论,推导两对边简支的开口圆柱壳行波与驻波结合形式的解析解;2. 基于回传射线矩阵法原理,推导出开口圆柱壳的固有频率方程;3. 采用黄金分割法求解开口圆柱壳的固有频率方程,得到精确的固有频率;4. 分析开口圆柱壳不同结构参数和边界条件对固有频率的影响。
结论:1. 回传射线矩阵法适用于开口圆柱壳的振动分析且具有很高的精度;2. 开口圆柱壳的固有频率随其长度的增加而减小;3. 对于绝大部分模态数,开口圆柱壳的固有频率随其半径的增加而减小;4. 开口圆柱壳的固有频率随壳厚的增加而增加,当周向模态数n=1和2时,不同壳厚的开口圆柱壳固有频率相差很小,当周向模态数n≥7时,开口圆柱壳的固有频率随壳厚线性变化;5. 对于绝大多数模态数,开口圆柱壳的固有频率随夹角的增大而快速减小;6. 对于两曲边简支的开口圆柱壳,其固有频率从高到低对应两直边的边界条件为固支、简支和自由;7. 对于两直边简支的开口圆柱壳,两曲边的边界条件对其固有频率的影响不大。

关键词:开口圆柱壳;回传射线矩阵法;自由振动分析;DMV薄壳理论;解析波动形式解

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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