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To study the influence of temperatures on the landing gears buffer performance, this paper, taking a certain aircraft landing gear as the research object, analyzes the influence law of temperature on buffer performance through drop tests in a given temperature range(−30 °C–60 °C). Based on the results, the paper focuses on analyzing the influence of temperature on air spring force and oil damping force in the buffer model and proposes a test-based analysis model of landing gear’s temperature-dependent buffer performance for verification. A certain aircraft landing gear is optimized with the maximum landing load at the extreme test temperature((−30 °C,60 °C) and normal temperature based on genetic algorithms. The results indicate: Temperatures have an obvious effect on the buffer performance, which is manifested in the changes in landing loads and buffer compression strokes; the model accounts for temperature on gas/oil properties in the buffer cavity through temperature-dependent air polytropic index and oil damping coefficient; genetic algorithm-optimized landing loads improve at both temperature extremes, enhancing buffer performance.

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Analysis, Modeling and Optimization of Temperature-Dependent Buffer Performance of Landing Gears Based on Drop Test

  • 会议论文

  • 发表日期：

    2026年

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  • Chenchen Zhu,
  • Zhaoming Huang,
  • Binwen Wang,
  • Jizhen Wang,
  • Xiaoli Ma

摘要

To study the influence of temperatures on the landing gears buffer performance, this paper, taking a certain aircraft landing gear as the research object, analyzes the influence law of temperature on buffer performance through drop tests in a given temperature range(−30 °C–60 °C). Based on the results, the paper focuses on analyzing the influence of temperature on air spring force and oil damping force in the buffer model and proposes a test-based analysis model of landing gear’s temperature-dependent buffer performance for verification. A certain aircraft landing gear is optimized with the maximum landing load at the extreme test temperature((−30 °C,60 °C) and normal temperature based on genetic algorithms. The results indicate: Temperatures have an obvious effect on the buffer performance, which is manifested in the changes in landing loads and buffer compression strokes; the model accounts for temperature on gas/oil properties in the buffer cavity through temperature-dependent air polytropic index and oil damping coefficient; genetic algorithm-optimized landing loads improve at both temperature extremes, enhancing buffer performance.