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Journal of Projectiles, Rockets, Missiles and Guidance >

2016 , Vol. 36 >Issue 4: 13 - 16,19

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2016.04.004

MISSILES AND GUIDANCE TECHNOLOGY

Influence of the Elastic Deformation on the Longitudinal Stability of the Slender Missile

  • QUAN Jingge ,
  • ZHANG Weiwei ,
  • YE Zhengyin
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  • National Key Laboratory of Aerodynamic Design and Research, Northwestern Polytechnical University, Xi'an 710072, China

Received date: 2015-05-12

  Online published: 2025-05-30

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Abstract

Considering interaction between flight dynamics and aeroelasticity, the influence of elastic deformation on longitudinal stability of a slender missile was analyzed by solving the unsteady aerodynamic flow and structural motion equations, based on the structure elastic mode and rigid flight mode. It was shown that, for the flexible missile with high slenderness ratio, influence between structural elastic deformation and rigid motion shall not be ignored. The stability analysis of the slender missile needed considering the structural elastic deformation and rigid flight motion together. After considering the pitching mode of the rigid body, the stability of missile was significantly changed. System stability changed from stable to unstable, and mainly presented longitudinal static instability of the pitch mode. Dynamic pressure and structural stiffness would affect the longitudinal stability of the missile.

Key words： high slenderness ratio; missile; elastic deformation; stability; flight dynamics; local piston theory

Cite this article

QUAN Jingge , ZHANG Weiwei , YE Zhengyin . Influence of the Elastic Deformation on the Longitudinal Stability of the Slender Missile[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2016 , 36(4) : 13 -16,19 . DOI: 10.15892/j.cnki.djzdxb.2016.04.004

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