Design method of thermal flutter equivalent model based on variable stiffness composite material

WANG Shoushen, XIAO Shixiong, ZHANG Bing

Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (15) : 44-50.

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PDF(2053 KB)
Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (15) : 44-50.

Design method of thermal flutter equivalent model based on variable stiffness composite material

  • WANG Shoushen, XIAO Shixiong, ZHANG Bing
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Abstract

To address the problems of short wind tunnel time and difficulty in achieving thermal equilibrium of the structure faced by thermal flutter wind tunnel experiments, a design method is proposed to establish a dynamical model equivalent to the thermal modal of the experimental model by using variable stiffness composite materials through structural optimization design, which provides a technical way to solve the thermal flutter wind tunnel experiments of complex models. The method takes full advantage of the designability of the local stiffness of the variable stiffness composites and combines the NSGA-II genetic optimization algorithm to perform the model design. Based on this method, an arithmetic study is conducted to optimize the fiber angle design of the equivalent composite airfoil model with the optimization objective of minimizing the error between the inherent properties of the equivalent composite airfoil model and the target model. The results of the study show that the inherent frequencies, inherent vibration patterns and chattering analysis of the two models are in good agreement, thus verifying the feasibility of the equivalent model design.

Key words

aerothermoelastic / flutter / tow-steered composite / equivalent model / NSGA-II

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WANG Shoushen, XIAO Shixiong, ZHANG Bing. Design method of thermal flutter equivalent model based on variable stiffness composite material[J]. Journal of Vibration and Shock, 2024, 43(15): 44-50

References

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