预张拉CFRP布增强加筋矩形板的动力特性分析  

Dynamic characteristic analysis of stiffened rectangular plates with pretension CFRP sheets

作　　者：丁驯 周叮[1] 刘朵 张建东 DING Xun;ZHOU Ding;LIU Duo;ZHANG Jiandong(College of Civil Engineering, Nanjing Tech University, Nanjing 211816, China;JSTI Group, Nanjing 211112, China)

机构地区：[1]南京工业大学土木工程学院,南京211816 [2]苏交科集团股份有限公司,南京211112

出　　处：《振动与冲击》2018年第6期124-129,共6页Journal of Vibration and Shock

基　　金：973计划课题(2012CB026205);江苏省交通厅重大专项(2014Y01)

摘　　要：研究预张拉CFRP布增强四边简支加筋矩形板的自由振动特性。将CFRP布、加强筋、矩形板三部分沿界面切开分别进行分析,矩形板和加强筋分别采用薄板理论和欧拉梁理论进行分析,预张拉CFRP布采用弦理论进行分析,根据各界面上的应力平衡条件和位移连续性条件得到CFRP布增强加筋板的振动频率方程,计算结果显示了很好的收敛性,数值结果与有限元ANSYS的分析一致。研究表明,CFRP的加固效果随层数和预张力增加而增强。The free vibration characteristics of simply supported stiffened rectangular plates strengthened with pretension CFRP sheets were studied.Firstly,the plate was divided into three parts along the interfaces:CFRP layer,stiffener and rectangular plate.The stiffener and stiffened plate was,respectively,analysed by the Euler beam theory and the thin plate theory.The pretension CFRP sheet was analysed by the string theory.Then,the vibration frequency equation of the stiffened plate strengthened with pretension CFRP sheets was worked out,according to the interface stress equilibrium conditions and the displacement continuity conditions.The numerical results show an excellent convergence.The presented results are consistent with the results from the finite element software ANSYS.The analysis shows that along with the increase of the layer number and the pre-stress,the reinforcing effect of CFRP on the dynamic characteristics of the stiffened rectangular plate is more significant.

关 键 词：预张拉CFRP 加筋板 自由振动 欧拉梁 薄板 

分 类 号：O383[理学—流体力学] O326[理学—力学]