Numerical analysis of dynamic characteristics of monorail rocket sled on rail
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摘要: 为系统性分析火箭橇在轨动力特性,采用三维Eluer-Bernouli梁单元对火箭橇系统进行离散,通过重构生成长程不平顺轨建立考虑轨道不平顺及滑靴磨损的靴轨非线性接触力模型,由Newmark-β结合Newton-Raphson局部迭代求解非线性动力学方程获得火箭橇在轨动力特性数值解,并通过试验验证,计算结果表明:马赫数为2的速度下火箭橇质心竖向过载峰值约为2 700g;火箭橇在轨占空比与航向速度成正比,马赫数为2的速度下竖向火箭橇在轨占空比为16%;高速段滑靴磨损量占全弹道磨损量的84%,靴轨单次接触磨损量与航向速度3次方成正比。Abstract: To systematically analyze the dynamic characteristics of rocket sled travelling along rail,the three-dimensional Eluer-Bernouli beam elements were used to discretize the rocket sled system,and the nonlinear contact force model of the slipper-rail considering rail irregularity and slipper wear was established by reconstructing the long-range irregularity rail,and finally,the nonlinear dynamics equations was solved by Newmark-β combined with Newton-Raphson local iteration method to obtain the numerical solution of dynamic characteristics on rocket sled. Though experimental verification,the results showed that the peak value of the vertical overload to the mass of rocket sled was about 2 700g at Mach number of 2 speed;the duty cycle of rocket sled on rail was proportional to forward speed,and the vertical duty cycle of rocket sled was 16% at Mach number of 2 speed;the wear of slippers in high speed section accounted for 84% of the total trajectory wear,and the single contact wear of slipper-rail was proportional to the third power of the forward speed.
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Key words:
- monorail rocket sled /
- dynamic characteristics /
- overload /
- duty cycle /
- slipper wear
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[1] BEUTLER F J.Precision measurement of supersonic rocket sled velocity:Part Ⅱ[J].Journal of Jet Propulsion,2015,28(12):809-816. [2] LAIRD D J.The investigation of hypervelocity gouging[D].Dayton,Ohio,USA:Air Force Institute of Technology Air University,2002. [3] HOOSER M,SCHWING A.Validation of dynamic simulation techniques at the holloman high speed test track[R].AIAA 2000-0155,2000. [4] 王健.高速火箭橇-轨道系统耦合动力学研究[D].南京:南京理工大学,2011. [5] 顾凯旋,龚明生,王磊,等.双轨火箭橇全时程动力学仿真分析研究[J].航空工程进展,2020,11(2):245-250. [6] 杨珍,范坤,胡兵,等.超声速单轨火箭橇动态载荷预示技术研究[J].兵器装备工程学报,2019,40(3):247-251. [7] FURLOW J S.Parametric dynamic load prediction of a narrow gauge rocket sled[D].Las Cruces,New Mexico,US:New Mexico State University,2006. [8] LAMBJAMES L.Critical velocities for rocket sled excitation of rail resonance[J].Johns Hopkins APL Technical Digest,2000,21(3):448-458. [9] 房明.孙建红.余元元.等.火箭橇系统的摩擦力分析与计[J].航空动力学报,2017,32(11):2769-2776. [10] SUN K,PENG W X,WEI B H,et al.Friction and wear characteristics of 18Ni(300) maraging steel under high-speed dry sliding conditions[J].Materials,2020,13(7),1485-1494. [11] .西安交通大学学报,2020,54(6):82-89. [12] WANG F,LUO G H,YANG X G,et al.Research on modeling and dynamic characteristics of complex coaxial rotor system[J].Journal of Vibroengineering,2017,19(3):1524-1545. [13] 魏兵辉.高超声速火箭橇干滑动摩擦磨损率预测研究[D].西安:西安交通大学,2020. [14] 安雪斌,潘尚峰.多体系统动力学仿真中的接触碰撞模型分析[J].计算机仿真,2018,25(10):98-101. [15] 赵项伟.静偏心下挤压油膜阻尼器动力特性探究[D].南京:南京航空航天大学,2018. [16] HOOSER C D.Holloman high speed test track rail alignment criteria[R].AIAA-2000-0156,2000. [17] KEVIN D.Holloman high speed test track design manual[R].AAC/PA 07-13-05-270,2005. [18] HOOSER M.Simulation of a 10 000 foot per second ground vehicle[R].AIAA-2000-2290,2000.
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