驾驶室内部噪声分析与阻尼降噪

摘要

基于有限元和边界元方法,运用ANSYS和SYSNOISE软件建立驾驶室声—固耦合有限元模型和声学边界元模型,计算在指定工况下壁板的振动和驾驶员右耳旁的声压级.在此基础上,进行面板声学贡献度分析,确定对驾驶员右耳声压贡献突出的壁板.通过采用沥青型阻尼材料对壁板进行减振降噪处理,有效地降低驾驶员右耳旁噪声.%The sound-structure coupled finite element model and the acoustic boundary element model of a cab were presented by applying ANSYS and SYSNOISE codes respectively. Vibration of panels under the specified condition and sound pressure level at driver's right ear was computed. According to the results, panel's acoustic contribution was analyzed and the panels which have important contribution to the sound pressure at the driver's right ear were confirmed. Applying the asphalt damping materials to the panels, the noise at driver's right ear was effectively reduced.