The invention relates to a hand brake exhaust pipe noise reduction design method and a hand brake exhaust pipe, and relates to the technical field of hand brake exhaust pipe noise reduction design. The tail end of the corrugated pipe is connected with the straight pipe with the diameter consistent with that of the corrugated pipe; the length of a straight pipe is designed to meet the requirement for noise reduction, and the method comprises the steps that a three-dimensional model of the hand brake exhaust pipe is established according to size parameters of a corrugated pipe and the straight pipe; all air areas in the hand brake exhaust pipe are extracted to serve as fluid areas, and a grid model of the fluid areas is drawn; constructing a pressure-based solver for simulating the gas state of the hand brake exhaust pipe and an acoustic model; inlet and outlet pressure boundary conditions are set according to the actual working condition of the hand brake exhaust pipe; setting a noise receiving point, and carrying out solution calculation; and extracting the sound pressure level of the sound signal of the noise receiving point, judging whether the sound pressure level reaches the acceptable level of the noise, if not, prolonging the length of the straight pipe, and carrying out modeling again to carry out simulation calculation until the sound pressure level of the noise reaches the acceptable level.
本发明涉及的一种手刹排气管降噪设计方法和手刹排气管,涉及手刹排气管降噪设计技术领域。本发明在波纹管的尾端连接直径与波纹管直径一致的直管;对直管的长度进行设计以满足降噪,包括:根据波纹管和直管的尺寸参数建立手刹排气管三维模型;提取手刹排气管内部所有空气区域作为流体域,绘制流体域的网格模型;构建模拟手刹排气管气体状态的压力基求解器和声学模型;根据手刹排气管实际工作状况设置入口及出口压力边界条件;设置噪声接收点,进行求解计算;提取噪声接收点的声信号的声压级,判断声压级是否达到噪声可接受水平,若未达到,延长直管长度,并重新建模进行仿真计算,直至噪声声压级达到可接受水平。
Noise reduction design method for hand brake exhaust pipe and hand brake exhaust pipe
一种手刹排气管降噪设计方法和手刹排气管
2024-09-27
Patent
Electronic Resource
Chinese
EXHAUST PIPE STRUCTURE OF PARKING BRAKE DEVICE AND EXHAUST PIPE OF PARKING BRAKE DEVICE
European Patent Office | 2019
|Blow at brake pipe exhaust port
Engineering Index Backfile | 1911
Hand brake, machining method for hand brake and hand brake cable support
European Patent Office | 2015
|