摘要
基于商用有限元软件MSC.Patran和Nastran,研究某型导弹的仪器舱结构的噪声环境动力学预示。首先建立仪器舱的三维壳单元模型;根据弹道数据理论,研究导弹在飞行过程中遭受噪声的总声压级,给出噪声声压级谱,并转换为压力功率谱密度函数;最后预示了该仪器舱在压力功率谱的作用下的动力学环境。
Based on the FEM software MSC.Patran and Nastran, the prediction of the noise environment dynamics of the missile instrument bay is investigated. Firstly, the 3-D shell model of the instrument bay is established. Secondly, the sound press lever （SPL） of the missile during flight is studied based on trajectory data. And the Spectrum of SPL is presented, which is transferred to power spectral density function of pressure. At last, the dynamic environment of missile instrument bay is predicted.
出处
《导弹与航天运载技术》
北大核心
2013年第2期13-15,共3页
Missiles and Space Vehicles
关键词
振动
噪声
振动环境预示
有限元法
Vibration
Noise
Vibration environment prediction
Finite element method
