THE INFLUENCE OF TEMPERATURE ON FLUTTER CHARACTERISTICS OF COMPOSITE RUDDER

doi:10.19936/j.cnki.2096-8000.20210328.001

Abstract

Abstract: The step-by-step solution method is adopted to analyze the influence of temperature on flutter characteristics of composite rudder. Firstly, thermal stress caused by the temperatureis analyzed, and the additional stiffness is calculated in the thermal stiffness matrix. Then, the thermal stiffness effect of the wall plate is imported into the thermal modal analysis. Finally, it is introduced into the rudder flutter model for flutter analysis. The effects of thermal stress, material modulus and temperature on the flutter characteristics of composite rudder were studied respectively. The results showed that the increase in temperature decreased the amplitude of natural frequency of each order of rudder to varying degrees. The frequency dropped dramatically with the increase of the order, which can increase the possibility of flutter. Flutter velocity decreases approximately linearly with temperature rise. The influence of the decline of material caused by temperature on flutter velocity of rudder is much stronger than thermal stress.

Key words: air-to-air missile, composites, rudder, temperature, flutter

CLC Number:

TB332

WANG Shuai, WU Wei, HUANG Yi-min, LUO Chu-yang, ZHANG Xiang-hui, CAI Pei-pei. THE INFLUENCE OF TEMPERATURE ON FLUTTER CHARACTERISTICS OF COMPOSITE RUDDER[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(3): 5-13.

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