以某火箭型号仪器舱为研究对象,建立不同的统计能量分析(Statistical Energy Analysis,SEA)模型,通过与试验数据对比,分析得出统计能量分析法预示精度与子系统的划分和模型参数密切相关,同时利用包络思想给出修正后的铝蒙皮类结构内损...以某火箭型号仪器舱为研究对象,建立不同的统计能量分析(Statistical Energy Analysis,SEA)模型,通过与试验数据对比,分析得出统计能量分析法预示精度与子系统的划分和模型参数密切相关,同时利用包络思想给出修正后的铝蒙皮类结构内损耗因子。合理的统计能量模型能够较好地预示仪器舱声振环境,预示结果满足工程分析的要求。展开更多
Noise characteristic is one of the important factors to be considered during the design of a launch vehicle system.In this paper,the acceptance conditions for the external noise environment of the instrument cabin are...Noise characteristic is one of the important factors to be considered during the design of a launch vehicle system.In this paper,the acceptance conditions for the external noise environment of the instrument cabin are given based on multi-source data,including the measured data of the launch vehicle lift-off noise,the mechanical environment of the launch vehicle equipment,and the external noise environment of the instrument cabin deduced from empirical formula.Then an acoustic and vibration transfer model is established based on the response data of the instrument equipment used to conduct measurements in the noise test reverberation room.By using an external noise environment and a transfer model,the response of the instrument and equipment for the acceptance condition can be obtained.The acoustic and vibration prediction technology introduced in this paper can provide technical support in the environmental prediction analysis of heavy launch vehicles for the future.展开更多
文摘以某火箭型号仪器舱为研究对象,建立不同的统计能量分析(Statistical Energy Analysis,SEA)模型,通过与试验数据对比,分析得出统计能量分析法预示精度与子系统的划分和模型参数密切相关,同时利用包络思想给出修正后的铝蒙皮类结构内损耗因子。合理的统计能量模型能够较好地预示仪器舱声振环境,预示结果满足工程分析的要求。
文摘Noise characteristic is one of the important factors to be considered during the design of a launch vehicle system.In this paper,the acceptance conditions for the external noise environment of the instrument cabin are given based on multi-source data,including the measured data of the launch vehicle lift-off noise,the mechanical environment of the launch vehicle equipment,and the external noise environment of the instrument cabin deduced from empirical formula.Then an acoustic and vibration transfer model is established based on the response data of the instrument equipment used to conduct measurements in the noise test reverberation room.By using an external noise environment and a transfer model,the response of the instrument and equipment for the acceptance condition can be obtained.The acoustic and vibration prediction technology introduced in this paper can provide technical support in the environmental prediction analysis of heavy launch vehicles for the future.
