微穿孔板消声器在风冷插箱噪声控制中的应用

雷达设备风冷插箱散热设计是雷达产品可靠性结构设计、热设计的重要内容。在实际应用中,强迫风冷被广泛使用,散热和噪声控制往往产生矛盾。如何控制噪声,对改善产品使用环境有着重要意义。文中针对风冷插箱噪声过大问题,运用微穿孔板近似吸声原理,设计了一种消声插件,对该微穿孔板消声器的降噪效果进行了测试,可以减低噪声3 dB(A)左右。从而说明该消声器有一定的降噪效果,在一定场合可以应用。

Application of Micro-perforated Panel in Noise Control ofWind-cooling Sub-rack

Heat dissipating design for wind-cooling sub-rack of radar devices is an important part of structure and heat design for radar device reliability.In practice,forced wind-cooling is widely used,noise control contradicts heat dissipating.Noise reduction is important for improving the products use environment.Based on the principle of acoustic absorbing of micro-perforated panel,this paper designs an acoustic absorbing plug-in module to overcome the big noise of wind-cooling sub-rack.Noise control effect of the micro-perforated panel absorber is tested,3 dB（A） noise reduction is obtained.So the absorber is effective and can be used in some situation.