摘要
雪橇板作为雪橇式起落装置与道面接触的唯一组件,其受载特性对于准确分析飞行器在积雪道面下的起降安全至关重要。针对雪橇板在积雪道面的受载特性展开深入分析,首先,以某型固定翼飞行器的雪橇式起落装置为研究对象,采用Capped Drucker-Prager本构模型对积雪道面进行表征,并依托有限元软件ABAQUS及耦合欧拉-拉格朗日(Coupled Eulerian-Lagrangian,CEL)方法建立了雪橇板的雪面受载仿真模型。随后,深入研究了雪橇板下沉接地速度、雪橇板结构尺寸以及雪体初始厚度3类参数对于雪橇板垂向受载的具体影响规律。最后,以雪橇板结构尺寸、前翘角度以及在积雪中的下陷深度为变量,系统分析了雪橇板在雪地滑行阶段航向受载特性的演变情况。研究结果表明:积雪厚度对雪橇板落震阶段的受载特性影响显著。在下沉接地速度为2.5 m/s的工况下,500 mm的雪体厚度使得雪橇板垂向峰值过载,相较于200 mm雪体厚度而言,下降62.39%;随着雪橇板宽度、前翘角度及其在雪地中的下陷深度增加,雪橇板滑行稳定时的航向推雪载荷逐渐增大。
As the sole contact component between skid-type landing gear and the runway surface,the load characteristics of the skid plate are critical for accurately analyzing aircraft safety during takeoff and landing on snow-covered runways.An in-depth analysis of the load characteristics of skid plates on snow-covered runways is conducted.Taking the skid-type landing gear of a fixed-wing aircraft as the research object,the Capped Drucker-Prager constitutive model is employed to characterize the snow-covered runway.A snow load simulation model for the skid plate is established using the finite element software ABAQUS and the Coupled Eulerian-Lagrangian method.The influence of three parameters,sink rate during touchdown,skid plate structural dimensions,and initial snow thickness,on the vertical load characteristics of the skid plate is investigated thoroughly.Additionally,the evolution of longitudinal load characteristics during the snow sliding phase is systematically analyzed,with variables including skid plate dimensions,front lift angle,and sinking depth in snow.Key results show that snow thickness significantly affects the load characteristics during impact.At a sink rate of 2.5 m/s,a snow thickness of 500 mm reduces the vertical peak load by 62.39%compared to 200 mm snow thickness;as the skid plate width,front lift angle,and sinking depth increase,the longitudinal snow-pushing load during stable sliding gradually increases.
作者
倪华近
艾剑波
卢致龙
杨欣旺
聂宏
魏小辉
NI Huajin;AI Jianbo;LU Zhilong;YANG Xinwang;NIE Hong;WEI Xiaohui(Nanjing University of Aeronautics and Astronautics,Nanjing Jiangsu 210016,China;China Helicopter Research and Development Institute,Jingdezhen Jiangxi 333000,China)
出处
《海军航空大学学报》
2026年第1期177-187,共11页
Journal of Naval Aviation University
基金
国家自然科学基金(52172368、52302453、52275114)
江苏省自然科学基金(BK20220135)
航空航天结构力学及控制全国重点实验室(南京航空航天大学)自主研究课题(MCAS-I-0224G03)。
关键词
起落架
雪橇板
耦合欧拉-拉格朗日方法
受载特性
积雪道面
landing gear
skid plate
Coupled Eulerian-Lagrangian method
load characteristics
snow-covered runway
