摘要
轻型履带车辆在服役过程中将经受多种服役环境,其受载及振动特征对于部件的设计及可靠性校核非常重要。进行样车整车台架道路载荷模拟试验是研发轻型履带车辆行动系统的必要环节之一。针对某型轻型履带样车,以2种典型试验场路面几何高程信号为输入,开展整车道路模拟试验,得到车辆质心处、驾驶员座椅处和炮塔座圈、耳轴和瞄准镜等位置的加速度及该样车陀螺仪角速度信息。对比不同路面工况和不同行驶速度下,各测试位置加速度响应特征和车体三向角速度特征的差异。通过FFT变换,获得各测试位置处加速度幅频特征。研究表明:履带车四处悬挂位置振动响应量值差异明显,悬挂位置振动频域特征中存在与车辆悬挂跨距相关的滤波窗特征。车体在戈壁路运行过程中各关注位置各向振动加速度及各向角速度均明显大于相同速度等级的铺面路。摇头角、点头角和侧滚角的角速度幅频特征主频均包括2.5 Hz和8.5~9 Hz两个频段,这两段频率对应的振动能量对驾驶员座椅振动有显著影响。履带车车体不同位置处振动响应包含的频率范围并不一致。
Light tracked vehicles will be subjected to a variety of service environments in the course of service,and their load and vibration characteristics are very important for the design and reliability check of components.The road load simulation test of a prototype vehicle is one of the necessary links in the research and development of light tracked vehicle action system.For a certain light tracked vehicle prototype,three typical test site road surface geometric elevation signals are used as inputs to carry out the whole vehicle road simulation test,to obtain the acceleration at the center of mass of the vehicle,at the driver’s seat and turret seat,trunnion and scope,as well as the information of the prototype’s gyroscopic angular velocity.The differences in acceleration response characteristics and angular velocity characteristics of each test position under different road conditions and different driving speeds are compared.The PSD characteristics of vibration acceleration at each test position and the vibration transmission law between related positions are obtained through FFT variation.The study shows that the vibration response of the tracked vehicle at four suspension positions varies significantly,and there are filter window features in the frequency domain characteristics of the vibration at the suspension positions that are related to the span of the vehicle’s suspension.The vibration acceleration in each direction and the angular velocity in each direction at each affected position of the vehicle body running on the Gobi road are significantly greater than those of the paved road at the same speed level.The main frequencies of the amplitude-frequency characteristics of the rocking head angle,nodding head angle and side-rolling angular velocity are all 2.5 Hz and 8.5~9 Hz,and the vibration energies corresponding to these two frequencies have a significant effect on the driver’s seat vibration.The frequency ranges included in the vibration response at different parts of the tracked vehicle body are not consistent.
作者
薛蕊
李振平
董明明
XUE Rui;LI Zhenping;DONG Mingming(System General Technology Department,China North Vehicle Research Institute,Beijing 100072,China;School of Mechanical Engineering and Automation,Beijing Institute of Technology,Beijing 100081,China)
出处
《兵器装备工程学报》
北大核心
2025年第8期159-169,共11页
Journal of Ordnance Equipment Engineering
关键词
轻型履带车辆
路面工况
行驶速度
振动加速度
角速度
振动传递
light trakced vehicle
load condition
velocity
vibration acceleration
angular velocity
vibration transfer
