考虑应变率效应的高海情运载火箭海上发射动力学特性研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (12) : 312-321.

航空航天

考虑应变率效应的高海情运载火箭海上发射动力学特性研究

王登，邵健帅，励明君，严松, 姜毅,

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Sea Launch Dynamics in Rough Sea Condition Considering Strain Rate Effects

WANG Deng，SHAO JianShuai， LI MingJun，YAN Song，JIANG Yi

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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实验数据，得到更为准确的改进唯象宏观模型。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。

Abstract

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, we developed an improved phenomenological macro model based on polyurethane foam experimental data to accurately capture the system dynamics. We established two dynamic models of the sea launch system, one with and one without considering the strain rate effect of the adapter, and studied the dynamic characteristics of the launch vehicle during sea launch under high sea conditions. The results indicate that the strain rate effects have a significant impact on the contact load between the adapter and guide rail and 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.

关键词

海上发射 / 发射动力学 / 应变率效应 / 火箭滚转

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王登, 邵健帅, 励明君, 严松, 姜毅, . 考虑应变率效应的高海情运载火箭海上发射动力学特性研究[J]. 振动与冲击, 2024, 43(12): 312-321

WANG Deng, SHAO JianShuai, LI MingJun, YAN Song, JIANG Yi. Sea Launch Dynamics in Rough Sea Condition Considering Strain Rate Effects[J]. Journal of Vibration and Shock, 2024, 43(12): 312-321

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