摘要
应用有限元方法研究飞行器典型部件(整流罩)在强噪声载荷下的结构响应及舱内噪声分布规律。选用平板对噪声的传递损失计算算例作为验证算例,在中低频段,计算结果与文献的试验结果对比较好,验证了有限元方法研究中低频飞行器声载荷响应问题的可靠性。通过有限元方法研究飞行器整流罩在强噪声载荷下的频域响应及整流罩内部的噪声分布规律,为飞行器的结构设计及仪器舱消声设计提供参考依据。
Finite element method （FEM） is applied to study both the structure response of typical component （shroud） and the cabin noise inside a space vehicle under strong acoustic load. The calculation of panel structure response to acoustic load is the strong validation for finite element method. The results of FEM agree well with the results of the referrence literature in the middle and low frequency, which proves that FEM is credible for study of structure response to acoustic load in the middle and low frequency. Structure response and cabin noise of space vehicle under severe acoustic load are studied with FEM, which gives good support to both structure design of the vehicle and noise elimination design of the instrument cabin.
出处
《导弹与航天运载技术》
北大核心
2014年第3期11-15,共5页
Missiles and Space Vehicles
关键词
有限元
噪声载荷
整流罩
平板
结构响应
Finite element method
Acoustic load
Shroud
Panel
Structure response
