摘要
复合材料结构已经在航空航天工程领域得到了广泛应用。当飞行器在大气中高速飞行时,气动热载荷会改变复合材料结构的动力学特性和动力学响应。目前,学者对恒定热环境下复合材料结构动力学响应的数值仿真进行了较多研究,而对于时变热环境下的数值仿真还尚未开展研究。提出了一种用于时变温度环境下复合材料夹层板结构动力学响应计算的数值仿真分析方法。首先,利用基于分段剪切变形理论的板单元建立了考虑热环境影响的复合材料夹层板结构有限元模型。然后,利用时变结构时间有限元方法计算了时变温度环境下复合材料夹层板结构的动力学响应。最后,对动态响应进行时频分析,并与由理论模态分析方法计算出的固有频率参考值进行对比,验证了该方法的有效性与精确性。提出的数值仿真分析方法可以有效地预示时变热环境下复合材料夹层板结构的热振响应,为热环境下复合材料结构的设计与分析提供了理论基础。
The composite structure has been widely used in the aerospace engineering.When the aircraft is flying at high speed in the atmosphere,the aerodynamic heat load will change the dynamic characteristic and dynamic response of the composite structure.At present,the numerical simulation of the dynamic response of composite structures in constant temperature environment has been studied by scholars,while the numerical simulation in the time-varying temperature environment has not been studied yet.In this paper,a numerical simulation analysis method for the dynamic response analysis of composite sandwich plates in time-varying temperature environments is proposed.Firstly,the finite element model of composite sandwich plates is established utilizing the plate element based on the piecewise shear deformation theory.And then the dynamic response of composite sandwich plates under the time-varying temperature environment is calculated by using the time finite element method for time-varying structures.Finally,the time-frequency analysis of the dynamic response is performed and the results are compared with the reference natural frequencies obtained using the theoretical modal analysis,by which the validity and accuracy of the proposed method are verified.The numerical simulation analysis method proposed in this paper can effectively predict the thermal vibration response of composite sandwich plates in time-varying temperature environments,and provides a theoretical basis for the design and analysis of composite structures in thermal environment.
作者
赵锐
于开平
崔乃刚
ZHAO Rui;YU Kai-ping;CUI Nai-gang(Department of Astronautic Science and Mechanics,Harbin Institute of Technology,Harbin 150001,China;Department of Astronautic Engineering,Harbin Institute of Technology,Harbin 150001,China)
出处
《振动工程学报》
EI
CSCD
北大核心
2018年第2期329-335,共7页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(11372084)
关键词
结构振动
复合材料结构
热振分析
时变结构
时程积分算法
structural vibration
composite structure
thermal vibration analysis
time-varying structure
time integration algorithm
作者简介
赵锐(1987—),男,博士,讲师。电话:(0451)86418100;E-mail:ruizhao@hit.edu.cn。;通讯作者:于开平(1968—),男,博士,教授,博士生导师。电话:(0451)86418100;E-mail:yukp@hit.edu.cn。
