摘要
高温使机体结构材料和结构的弹性性能发生变化,引起结构固有频率、模态等振动特性的改变,对结构动力学特性和飞行安全影响巨大。因此,研究力热耦合环境条件下的固有频率等振动参数随温度的变化规律以及热振耦合优化设计技术,对高超声速飞行器的可靠性设计和安全飞行具有重要的意义。针对高温热载环境下的振动优化问题,以飞行器典型高温热结构为研究对象,借助结构优化工具,考虑结构重量、可制造性、强度、刚度等主要因素,利用优化准则法控制设计目标与材料分布,完成了高温环境下的结构形貌优化,以及高温环境下结构固有频率优化分析,可为高超声速飞行器典型部位高温振动优化设计提供技术支撑。
High temperature changes the elastic properties of structural materials,and cause the changes of structural vibration characteristics such as natural frequency and mode,which has a great impact on structural dynamic characteristics and flight safety.Therefore,it is great significant for reliability design and safe flight for hypersonic vehicle to study the change law of natural frequency and other vibration parameters with temperature under conditions of mechanical and thermal coupling environment and optimization design technology of thermal and vibration coupling.In this paper,Taking typical high-temperature thermal structure of aircraft as the research object,and with the help of structural optimization tools,considering the main factors such as structural weight,manufacturability,strength,stiffness,etc,and the vibration optimization problem under high temperature thermal load environment is discussed.By using optimation criterion method to control the design objectives and material distribution,the structural morphology optimization and structural natural frequency optimization analysis under high temperature environment are completed,which can provide technical support for high temperature vibration optimization design of typical parts of hypersonic vehicle.
作者
魏衍强
王钦
王磊
李鹏飞
WEI Yanqiang;WANG Qin;WANG Lei;LI Pengfei(Shenyang Aircraft Design&Research Institute,Shenyang 110035,China)
出处
《飞机设计》
2025年第3期33-38,共6页
Aircraft Design
关键词
高温振动
结构优化
热结构
热应力
固有频率
high temperature vibration
structural optimization
thermal structure
thermal stress
natural frequency
