Analysis on the damping oil hole parameters of a landing gear based on lattice Boltzmann method

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (2) : 182-188.

GAN Shengyong1,2,3,WEI Xiaohui1,2,3,FANG Xingbo1,2,3

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Abstract

In order to analyze the damping characteristics of the landing gear oil hole, the lattice Boltzmann method was used to analyze the influence of oil hole geometric parameters and operating environment parameters on the oil flow characteristics. Based on the single parameter analysis results and the least squares method, the damping force regression equation was established and verified. The results show that the lattice Boltzmann method can accurately analyze the oil hole damping performance. The oil hole length changes the position of the flow minimum contraction section in the oil hole, the variation of the oil hole diameter in a limited interval has little effect on the discharge coefficient, and the increase of the backpressure improves the oil hole flow quality. The regression equation can predict the damping force reliably in the design interval, and the method can be used in general landing gear oil hole design.

Key words

damping characteristics / landing gear / orifice damping force / regression equation / computational fluid dynamics

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GAN Shengyong1,2,3,WEI Xiaohui1,2,3,FANG Xingbo1,2,3. Analysis on the damping oil hole parameters of a landing gear based on lattice Boltzmann method[J]. Journal of Vibration and Shock, 2023, 42(2): 182-188

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