基于超材料声屏障的 １０kV 开关站噪声控制

对 １０kV 开关站噪音特性进行了测试,在此基础上从声学理论出发设计了分形声学噪声屏障,对具有良好低频隔声性能的三阶隔声屏障进行了仿真分析,通过试验测量了噪声屏障对各频段噪声的衰减效果,验证了此声学超材料的降噪有效性;并且提出了一种结合超材料声屏障的有源噪声控制方法,来补偿声屏障边缘附近的绕射声波以进一步提升降噪性能.最后,设计搭建了一套结合超材料声屏障的噪声实验系统,并进行了试验验证.

Noise Control of 10 kV Switch Station Based on Metamaterial Noise Barrier

The noise characteristics of １０kV switch station are tested． Based on the acoustic theory , the fractal acoustic noise barrier is designed．The third-order noise barrier with good low-frequency sound insulation performance is simulated and analyzed．The attenuation effect of noise barrier on each frequency band is measured through experiments , and the effectiveness of noise reduction of this acoustic metamaterial is verified． In addition , a new type of acoustic metamaterial combined with super material is proposed The active noise control method of material noise barrier is used to compensate the diffraction sound wave near the edge of the noise barrier to further improve the noise reduction performance．Finally , a set of noise experimental system combined with metamaterial noise barrier is designed and built , and the experimental verification is carried out．