热环境下弹性支撑梯形复合材料层压板的振动特性:理论和实验研究  

Vibration characteristics of trapezoidal composite laminate plates with elastic foundation in thermal circumstance:theoretical and experimental research

作　　者：于大智 宋旭圆 臧健[1] 张振[1] YU Da-zhi;SONG Xu-yuan;ZANG Jian;ZHANG Zhen(College of Aerospace Engineering,Shenyang Aerospace University,Shenyang,110136,China)

机构地区：[1]沈阳航空航天大学航空宇航学院,沈阳110136

出　　处：《新能源航空》2023年第3期37-48,共12页

摘　　要：复合材料在新能源飞机机翼中的占比较大,而机翼结构容易在飞行过程中发生共振。为了保证飞机的工作性能和飞行安全,对机翼结构振动特性的研究至关重要。本文对形状类似于机翼结构的梯形复合材料层压板在热环境和不同边界支撑条件下的振动特性进行了系统的理论和实验研究。利用等参坐标变换简化了梯形复合材料层压板的力学模型。应用Rayleigh-Ritz方法推导了热环境中不同边界条件下梯形复合材料层压板的动力学方程。通过与有限元分析和实验结果的比较,验证了理论分析的可靠性和收敛性。最后,详细研究了热环境和不同支撑条件对梯形复合材料层压板振动特性的影响。Composite materials account for a large proportion in the wings of green energy aircraft,and wing structures are prone to resonance during flight.In order to ensure the operational performance and flight safety of the aircraft,this paper systematically studied the vibration characteristics of trapezoidal composite laminates with a shape similar to wing structures under thermal environment and different boundary support conditions,both theoretically and experimentally.The mechanical model of trapezoidal composite laminates was simplified using iso-parametric coordinate transformation.The dynamic equations of trapezoidal composite laminates under different boundary conditions in a thermal environment were derived using the Rayleigh Ritz method.The reliability and convergence of theoretical analysis were verified by comparing it with finite element analysis and experimental results.Finally,the influence of thermal environment and different support conditions on the vibration characteristics of trapezoidal composite laminates was studied in detail.

关 键 词：梯形复合材料层压板 弹性支撑 热环境 Rayleigh-Ritz方法 

分 类 号：O3[理学—力学]