应用统计能量方法分析小型飞机座舱内部振动和噪声

飞机座舱内部振动／噪声的预测对改进飞机性能具有重要意义，并为实际飞机设计和噪声控制措施提供理论依据。建立了小鹰-500飞机（LB500）全机的统计能量分析模型，应用统计能量分析方法对该小型飞机在发动机作用下和紊流边界层的激励下舱内前后排乘员耳部噪声及结构振动响应进行了分析，预测了飞机舱内的振动／噪声分布。通过采用隔振和吸声改进措施，降低了飞机座舱内的振动和噪声水平。

Prediction of Noise and Vibration Inside Cabin by Statistical Energy Analysis

Prediction of noise and vibration inside aircraft cabin is important in improving performance of aircrafts, which provides a theoretical basis for noise and vibration control in aircraft design. In this paper, a mod2 el of statistical energy analysis of LE-500 is built, the vibration of engine and the load of turbulence boundary layer is used to study the distribution of noise and vibration. Some applications are used to reduction noise and vibration level in the cabin of LE-500.