文档介绍：第34卷第Sl期 2014年12月噪声与振动控制 NoISE AND VⅡ}RATIoN CONTROL vol34 文章编号:1006—1355(2014)S1— 雷达罩舱内噪声预测及降噪分析雷烨,曾向阳(西北工业大学航海学院,西安710072) 摘要:以统计能量分析理论为基础,结合有限元方法,建立了飞机雷达罩舱内噪声预测模型,预测了振动激励下的舱内噪声水平。由于实验中仅布置了振动测点,因此,利用振动响应数据来验证预测模型的可利用性。将预测结果与实验数据进行对比,发现各测点的加速度总振级误差范围在2 dB~7 dB。经过能量传递路径分析,得到了影响舱内噪声的主要声辐射结构,结合舱内机载设备的安装位置,利用吸声材料对关键部位进行降噪处理,取得了良好的降噪效果。分析表明,研究方法和降噪措旋是可行的。关键词:声学;雷达罩;舱内噪声;统计能量分析;吸声中图分类号:TB532 TB535 文献标识码:A Noise Prediction inRadome Cabin and Noise Control analysis LEI Ye。ZENG Xiang-yang (Northwestern Polytechnieal University,School ofMarine Science andTechnology, Xi’all710072,China) Abstract:Based on the staffsticalenergy analysis bined with the finiteelement method,a prediction model fornoiselevelintheradome cabin sound press level undervibmfionM excitation thevibrationWaS measured,therefore,the vibration response was used toverify theavailability oftheSEA error between thecalculated eleration levelandexperimentation lessthan 7dB。The main energy path which influene— esthe noise level obtained through theanalysis ofthe energy bmed硒Ⅱl theinstallationlocationofequip— ments,noise reduction byusing sound absorption materials finaleffect indicated thatthe re- search method and也e noisecontrol订eatmems ale feasible. Key words:acoustics;radome;cabin noise;statistical energy analysis;sound absorption 雷达罩大量