主体结构位移激励下碳纤维索网的振动_刘少斌的知识.pdfVIP

第35 卷 第6 期 兰　州　理　工　大　学　学　报 Vol.35 No.6 2009 年12 月 Journal of Lanzhou University of Technology ec.2009 　　文章编号:1673-5196(2009)06-0114-05 主体结构位移激励下碳纤维索网的振动 刘少斌 (湖南文理学院土木 筑工程学院, 湖南常德　415000) 摘要:在考虑温度变化的基础上, 研究椭圆平面双曲抛物面碳纤维索网在主体结构激励下的非线性振动问题. 立 椭圆平面双曲抛物面碳纤维索网在主体结构位移激励下的非线性振动方程, 采用Galerkin 原理及 KBM 法求得椭 圆平面双曲抛物面碳纤维索网非线性振动的近似解.在将碳纤维索网与钢丝索网作比较的基础上, 讨论分析位移 激励、温度、振幅、外阻尼等因素对椭圆平面双曲抛物面碳纤维索网非线性振动的影响, 得到碳纤维索网对温度变 化不敏感, 且碳纤维索网振动特性优于钢丝索网振动特性的结论. 关键词:主体结构;位移激励;碳纤维;索网;非线性振动 中图分类号:TU311.3;TU38;O322　　文献标识码:A Vibration of cable net made of carbon fiber cables under excitation of main structure displacement LIU Shao-bin (ept.of Civil and Architectural Engineering, Hunan University of Arts and Science, Changde　415000, China) Abstract:Taking temperature variation into account, nonlinear vibration of elliptic paraboloid cable net made of carbon fiber cables was investigated under excitation of main structure displacement.Its nonlinear vibration equation was presented, and the approximate solution of nonlinear vibration of ellipticparaboloid cable mesh was given by using Galerkin principle and KBM method.Then the influence of such factors as the displacement excitation, temperature, amplitude, and external damping on the nonlinear vibration of the cable net were discussed and analyzed on the basis of comparison between steel cable net and carbon fi- ber cable net, so that a conclusion was got that carbon fiber cable net was insensitive to temperature change and the vibration characteristics of cable net with carbon fiber cables was superior to cable net with steel cables. Key words:main structure;displacement excitation;carbon fiber;cable net;nonlinear vibration 　　由于碳纤维增强复合材料的徐变和松弛等重要 美国等国家都