翼型火箭橇振动特性分析与试验验证  

Vibration characteristics analysis and experimental verification of airfoil rocket sled

作　　者：杨珍 王磊 周学文 郑珂 YANG Zhen;WANG Lei;ZHOU Xuewen;ZHENG Ke(Norinco Group Test and Measuring Academy,Xi’an 710100,China)

机构地区：[1]中国兵器工业试验测试研究院,西安710100

出　　处：《兵器装备工程学报》2025年第3期129-136,共8页Journal of Ordnance Equipment Engineering

摘　　要：为解决非对称带翼火箭橇在轨稳定运行和动态载荷准确预示难题,采用工程算法快速估算靴轨间磨损量得到最大速度工况下的靴轨间隙,建立翼型橇与轨道的耦合动力学模型,对侧翼气动力进行寻优设计,详细分析翼型火箭橇系统的振动特性,并进行试验验证。研究结果表明:侧翼最优气动下压力为20 kN,能有效抑制侧滑靴振动,防止系统发生滚转;翼型火箭橇系统的前三阶弯曲模态频率在90 Hz内,与轨道不会发生橇轨耦合共振,侧翼出现上下摆动、上拱等振动特点;滑靴表现出明显的随机持续性冲击响应特性,动应力峰值达到1500 MPa,而橇体的动应力在400 MPa以内;翼型橇侧滑靴振动量最大峰值是对称结构火箭橇滑靴的5倍;侧滑靴随系统低频运行过程中产生高频谐振;实测振动均方根与仿真值量级相同,趋势相同。翼型火箭橇试验的顺利实施,为武器装备地面动态试验提供了一种新的低成本验证方法。In order to solve the problem of stable operation and accurate prediction of vibration characteristics of asymmetric rocket sled on rail.An engineering algorithm is used to quickly estimate the wear between slipper-rails to get the clearance of slipper-rails at maximum speed.The finite element calculation model of sled-rail coupling dynamics at maximum velocity is established.Optimization design was carried out on the aerodynamic forces of the wing.The vibration characteristics of airfoil rocket sled system are analyzed.The airfoil rocket sled test was carried out to verify the study.The optimal aerodynamic downforce of the wing is 20 kN,which can effectively suppress the vibration of the side slipper and prevent the system from rolling.The frequency of the first three bending modes of the airfoil rocket sled system is within 90 Hz.The natural frequency is different from rail,and there will be no sled-rail coupling resonance.The wing exhibits vibration characteristics such as up and down swinging and arching.The peak dynamic stress of the slipper shoe reaches 1500 MPa.The stress of the sled body is with 400 MPa.The side slipper’s maximum peak value of vibration is 5 times than conventional symmetrical rocket sled slippers.In the process of running with the system at low frequency,the side slipper also produces high frequency resonance.The measured root mean square of vibration has the same magnitude and the same trend as the simulated value.The successful implementation of the airfoil rocket sled test provides a new low-cost validation method for ground dynamic testing of weapon equipment.

关 键 词：翼型火箭橇 运动稳定性 橇轨耦合 振动 

分 类 号：TJ03[兵器科学与技术—兵器发射理论与技术] TP391.9[自动化与计算机技术—计算机应用技术]