航空科学技术2025，Vol.36Issue(1)：64-74,11.DOI:10.19452/j.issn1007-5453.2025.01.008
火箭整流罩近壁噪声模化及声振响应分析
Modeling of Near Wall Noise and Analysis on Acoustic Vibration Response of Rocket Fairings
摘要
Abstract
The hash acoustic load and structural vibration generated by high-speed airflow on the surface of launch vehicles are one of the key factors in endangering the safety of launch vehicle structures and reducing the reusable life of skin structures.To investigate the structural vibration caused by the acoustic load simulated by a wavenumber spectrum model,the finite element method is used in this work to calculate the velocity response of the similar model for the Long March 5B Launch vehicle.The research results indicate that significant changes in the spatial phase of the acoustic load will affect the amplitude,and the prediction accuracy of the vibroacoustic response will be improved with the spatial correlation of the acoustic load considered.Obviously,the magnitude of the vibroacoustic response is not only affected by the amplitude of the acoustic load,but also related to the width of the acoustic load distribution.Based on the understanding of the influence of spatial wavenumbers on structural vibroacoustic response,the most perfect matching for the spatial wavenumber and the structure can be found to achieve reducing both the vibration and acoustic load of rocket fairings.The modeling and analysis method of vibroacoustic response by considering load spatial correlation provides a new perspective for the structural safety design and reusable design of China's new generation large launch vehicles.关键词
运载火箭/声振响应/脉动压力/空间相关/振动控制Key words
launch vehicle/vibroacoustic response/fluctuating pressure/spatial correlation/vibration suppression分类
航空航天引用本文复制引用
赵天泽,周国成,宁荣辉,董宾,赵小见..火箭整流罩近壁噪声模化及声振响应分析[J].航空科学技术,2025,36(1):64-74,11.基金项目
航空科学基金(20220032072001) （20220032072001）
四川省科学基金(2023NSFSC0057) Aeronautica Science Foundation of China(20220032072001) （2023NSFSC0057）
Science&Technology Foundation of Sichuan Province(2023NSFSC0057) （2023NSFSC0057）
