【摘要】 飞机起落架机轮着陆时,受到的最大水平冲击载荷是起落架安全设计和性能分析中的重要参数。文中通过非接触式光电测试方法,由实验获得落震试验中机轮触台瞬间转速的动态变化数据,并建立机轮瞬态转速与水平冲击力之间的动力学关系,根据实测得到的机轮转速的瞬态变化数据,推算机轮着地时的最大水平冲击载荷。为了验证由转速变化确定水平冲击载荷这一方法的准确性,建立机轮水平冲击载荷模拟试验验证装置。实验结果表明,由实测机轮瞬态转速变化确定的水平冲击载荷与力传感器测量得到的结果吻合性良好。实验结果验证文中方案的可行性,其研究工作为起落架落震试验中机轮水平冲击载荷的测量提供一种可实际应用的方法。更多还原

【Abstract】 The horizontal impact load of landing gear in the twinkling for aircraft landing is an important parameter for safety design and the analysis of landing gear.Dynamic data of the rotational speed of airplane wheel when contacting with the drop test platform has been measured by a non-contact photoelectric measurement method.And a kinetic relationship between the horizontal impact load of landing gear and the instantaneous rotational speed of airplane wheel was established.The maximum horizontal impact load of landing gear could be determined by the instantaneous rotational speed of airplane wheel when contacting the platform.In order to verify the correctness of this method,experiment analogue apparatus for measuring the horizontal impact load of landing gear was set up.Experiment results show that there is a good correspondence between the results of horizontal impact load determined by instantaneous rotational speed and the experimental data obtained by force sensor.The feasibility and usability of this method have been proved by experiment results and a practical method for determining horizontal impact load in landing gear drop test was also proposed.更多还原