考虑弹性影响的乘波体飞行动力学特性

向锦武; 曾开春; 聂璐

考虑弹性影响的乘波体飞行动力学特性

北京航空航天大学航空科学与工程学院, 北京 100191

基金项目: 国家自然科学基金资助项目(90916006 )

详细信息

中图分类号: V 212.1
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出版历程
- 收稿日期: 2012-03-06
- 网络出版日期: 2012-10-30

Elastic effects on flight mechanics of waverider

School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 针对典型的吸气式乘波体构型高超声速飞行器,研究了结构弹性对纵向静态特性和飞行动力学特性的影响.使用当地流活塞理论给出了高超声速非定常气动力模型,并结合简化的超燃冲压发动机模型及弹性机体结构模型,建立了考虑气动/结构/推进耦合的飞行器非线性纵向动力学模型.基于该模型分析了机体弯曲刚度变化对飞行器定常平飞配平参数、飞行包线以及动力学系统开环零极点的影响.结果表明:机体结构刚度降低将使配平升阻比减小,动稳定性变差,并且当其低于某一临界值时,升降舵配平特性将由正操纵变为反操纵.
- 高超声速飞行器 /
- 静配平分析 /
- 动力学稳定性 /
- 结构弹性
Abstract: The impact of structural elasticity on the static properties and dynamic stability of a typical air-breathing hypersonic vehicle was investigated. An integrated aeropropulsive/aeroelastic model was developed for the longitudinal dynamics of hypersonic vehicles, with local piston theory for unsteady aerodynamics. A comparative analysis of level-flight trim control, trimmable region, open-loop poles and non-minimum phase zeros was performed when the fuselage was subjected to different bending stiffness. The results show that the structural elasticity has a significant influence on the flight mechanics of hypersonic waverider. The elevator operation mode of vehicles with flexible fuselage is reversed in high Mach number zone. As the fuselage bending stiffness decreases, the lift-drag ratio drops and dynamic stability deteriorates.
- hypersonic vehicles /
- static analysis /
- dynamic stability /
- elasticity

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参考文献(10)

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