T700碳纤维复合材料圆柱壳振动特性的实验与分析研究

IF 4.4 2区 工程技术 Q1 ENGINEERING, OCEAN
Ruixuan Hu , Xinhu Zhang , Dongyang Chen , Yangrenyan Li , Yu Jia , Yajun Shi , Guang Pan
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引用次数: 0

摘要

本文采用实验和有限元相结合的方法对碳纤维增强复合材料圆柱壳的自由振动特性进行了研究。对某碳纤维增强复合材料壳体进行了模态试验,建立了相应的有限元模型计算其模态特性。将计算结果与实验结果进行了比较,验证了有限元模型特性的准确性。利用验证的有限元模型对薄壳(h/R≤0.05)和厚壳(h/R≥0.1)进行了综合参数研究,并进行了系统的对比分析。系统分析了层数、铺层角度、堆叠顺序、边界条件、长半径比、厚半径比等因素对振动特性的影响。研究结果表明:(1)壳体的固有频率对铺层角度的敏感性大于对铺层顺序的敏感性。(2)与[90/θ/−θ/90]叠层序列相比,[θ/−θ]2叠层序列对铺层角变化的敏感性更明显。(3)与薄壳相比,厚壳对厚度角变化的敏感性更明显。(4)铺层角变化和厚半径比变化对基频影响显著。这项工作为厚复合材料壳体的动力学提供了新的和实验验证的见解,并为其结构设计奠定了基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental and analytical investigation of vibration characteristics in T700 carbon fiber composite cylindrical shells
In this study, the free vibration characteristics of carbon fiber reinforced composite cylindrical shells are investigated through both experimental and finite element methods. Modal tests were conducted on a carbon fiber reinforced composite shell, and a corresponding finite element model was developed to calculate its modal characteristics. The calculate results were com-pared with the experimental results to verify the accuracy of the finite element model characteristics. The validated finite element model was used to conduct comprehensive parametric studies of both thin shells (h/R≤0.05) and thick shell (h/R≥0.1) shells, and the systematic comparative analysis was carried out. The effects of the number of layers, ply angle, stacking sequence, boundary conditions, length-radius ratio, and thickness-radius ratio on the vibration characteristics were systematically analyzed. Research findings indicate that: (1) The natural frequency of the shell demonstrates greater sensitivity to ply angles than to stacking sequences. (2) The [θ/−θ]2 stacking sequence demonstrates more pronounced sensitivity to ply angle variations compared to the [90/θ/−θ/90] stacking sequence. (3) Thick shells demonstrate more pronounced sensitivity to ply angle variations compared to thin shells. (4) Both ply angle variations and thickness-radius ratio changes significantly influence the fundamental frequency. This work provides novel and experimentally verified insights into the dynamics of thick composite material shells and lays the foundation for their structural design.
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来源期刊
Applied Ocean Research
Applied Ocean Research 地学-工程:大洋
CiteScore
8.70
自引率
7.00%
发文量
316
审稿时长
59 days
期刊介绍: The aim of Applied Ocean Research is to encourage the submission of papers that advance the state of knowledge in a range of topics relevant to ocean engineering.
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