摘要
运载火箭海上发射过程是一个强非线性复杂系统级问题。在海上风浪环境下,运载火箭与框架式发射架之间发生相对运动,适配器与导轨间的多次冲击载荷非线性、不连续,多次冲击速度不同,应对适配器模型的应变率效应进行评估。首先基于聚氨酯泡沫试验数据,得到更为准确地改进唯象宏观模型。分别建立考虑适配器应变率效应和不考虑适配器应变率效应的海上发射系统动力学模型,对高海情下运载火箭海上发射系统动力学特性进行研究。结果表明,应变率效应对运载火箭海上发射过程中适配器与导轨接触载荷影响较大,对运载火箭海上发射滚转运动规律影响显著,将直接影响后续运载火箭海上发射安全性评估及限转装置设计。研究对运载火箭海上发射具有较高工程价值及理论指导意义。
Launch vehicle sea launch is a complex and nonlinear system.With relative motion between the launch vehicle and frame-type launcher,nonlinear and discontinuous impact loads between the adapter and guide rail occur at different speeds.Evaluating the strain rate effects of the adapter model is crucial.In this paper,an improved phenomenological macro model was developed in this work based on polyurethane foam experimental data to accurately capture system dynamics.Two dynamic models of the sea launch system were established,one with and one without considering the strain rate effect of the adapter,the dynamic characteristics of the launch vehicle during sea launch under high sea conditions was studied.Results indicate that the strain rate effects have a significant impact on the contact load between the adapter and the guide rail and on the rolling motion law of the sea launch.This directly affects the safety assessment and design of the rolling limiting device for sea launch.Overall,the research provides important insights into the engineering and theoretical aspects of launch vehicle sea launch,highlighting the requirement to consider the strain rate effects of the adapters in sea launch dynamics modeling and safety assessment.
作者
王登
邵健帅
励明君
严松
姜毅
WANG Deng;SHAO Jianshuai;LI Mingjun;YAN Song;JIANG Yi(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China;Beijing Institute of Space Launch Technology,Beijing 100076,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2024年第12期312-321,共10页
Journal of Vibration and Shock
基金
国防基础科研计划(JCKY2021602B030)。
关键词
海上发射
发射动力学
应变率效应
火箭滚转
sea launch
launch dynamics
strain rate effects
launch vehicle rolling
