高超声速火箭橇刨削效应仿真与验证研究  

Simulation and Verification Study on Gouging Effect of Hypersonic Rocket Sled

作　　者：夏洪利 刘振[1] 闫华东 赵项伟 孟鑫 XIA Hongli;LIU Zhen;YAN Huadong;ZHAO Xiangwei;MENG Xin(School of Aerospace Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Norinco Group Test and Measuring Academy,Huayin,Shaanxi 714200,China)

机构地区：[1]西安交通大学航天航空学院,710049 [2]中国兵器工业试验测试研究院,陕西华阴714200

出　　处：《西安交通大学学报》2023年第4期71-79,共9页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(52075417)。

摘　　要：为形成具有高置信度水平的火箭橇试验刨削效应分析能力,基于真实的在轨试验刨削数据,开展了高超声速火箭橇刨削效应仿真与验证研究。首先,通过分析火箭橇在轨试验真实刨削数据,获取了典型刨削现象的参数描述;通过化学成分和金相显微组织检测,实现了基于绝热剪切理论的刨削机理闭环验证。然后,利用静态拉伸试验和高温双同步Hopkinson杆试验,获取了Johnson-Cook本构模型参数。最后,使用物质点分析方法,开展了火箭橇垂向速度分别为1.75、2.00和2.25 m/s的3种工况刨削效应仿真,得到了与真实试验刨削形貌基本一致的仿真结果。仿真结果与在轨试验真实数据对比显示,当滑靴垂向速度为2 m/s时,刨削坑长度、深度实验和仿真偏差分别为1.8%、-3.9%,均未超过5%,达到了较高的一致性,验证了物质点方法分析刨削的适用性。该方法和参数取值可以作为后续高超声速火箭橇试验试前刨削安全性评估的参考。In order to develop the ability to analyze the gouging effect of rocket sled test with high confidence level,a simulation and verification study on gouging effect of hypersonic rocket sled was carried out based on real gouging data in orbit.Firstly,the parameter description of typical gouging phenomenon was obtained by the analysis of real gouging data of rocket sled test in orbit,and the closed-loop verification of gouging mechanism based on adiabatic shear theory is completed through the detection of chemical composition and metallographic microstructure.Secondly,the Johnson-Cook constitutive model parameters were obtained by static tensile test and Hopkinson bar test based on the principle of high temperature double synchronization.Finally,the simulations of gouging effect under three vertical speed conditions of 1.75 m/s 2.00 m/s and 2.25 m/s were carried out using material point method.The simulation results in terms of gouging morphology were basically consistent with the ones obtained by real tests.The comparison between the results of simulation and real tests shows that the consistency between measurement and simulation is the best when the vertical speed of the slipper is 2 m/s,and the deviations of the length and depth of the gouging pit are 1.8% and -3.9%,which are not more than 5%.The applicability of the material point method in analyzing gouging is verified.The method and parameter value can be used as a reference for the gouging safety evaluation in the design stage of hypersonic rocket sled test.

关 键 词：火箭橇 刨削效应 物质点法 火箭橇在轨试验 

分 类 号：TJ015[兵器科学与技术—兵器发射理论与技术]