某型急救车舱内噪声分析与优化  

Analysis and optimization of cabin noise for one ambulance

作　　者：刘鑫 朱云江 王丹辉 苏琛 LIU Xin;ZHU Yun-jiang;WANG Dan-hui;SU Chen(Systems Engineering Institute,AMS,PLA,Tianjin 300161,China;Unit 32381,People's Liberation Army,Beijing 100072,China)

机构地区：[1]军事科学院系统工程研究院,天津300161 [2]解放军32381部队,北京100072

出　　处：《医疗卫生装备》2023年第10期17-22,共6页Chinese Medical Equipment Journal

摘　　要：目的:分析某型急救车舱内的噪声并进行优化,以降低车舱内噪声,提高作业的舒适性。方法 :在典型工况下,选取车舱内医护人员、卧姿伤员和坐姿伤员耳畔作为测试点,对某型急救车舱内的噪声进行测试,通过对噪声分布和频谱进行分析,进一步确定噪声源的位置、频率和传递方式,并针对性地通过优化排气管结构布局降低排气噪声、增加前后轮罩气密性降低轮胎噪声、优化和加强悬置设计降低机械传动噪声,降低整车的振源激励和振动传递。结果:通过性能优化,急救车舱内全部测试点的噪声均符合≤75 dB的技术指标要求,且各测试点噪声平均值下降2.9 dB,降噪效果显著。结论:该研究提出的降噪方法有效地降低了急救车舱内的噪声,提高了急救车作业的舒适性。Objective To analyze and optimize the noise in the cabin of some type of ambulance to enhance comfort during operation.Methods The cabin noise of some ambulance was tested under typical working conditions with the test points near the ears of the medical personnel and litter and ambulatory casualties so as to analyze noise distribution and spectrum,and the location,frequency and transmission mode of the noise source were determined,then some measures were taken accordingly including optimizing the structural layout of the exhaust pipe to reduce exhaust noise,increasing the airtightness of the front and rear wheel covers to decrease tire noise,strengthening the suspension design to lower mechanical transmission noise and weakening the vibration source excitation and vibration transmission of the ambulance.Results After performance optimization the noise at all the test points in the ambulance cabin met the technical requirement(not higher than 75 dB),and noise reduction was realized effectively with lowering the average value of the noise at all the test points by 2.9 dB.Conclusion The noise reduction measures proposed behaves well in the cabin of some ambulance,and thus enhances the comfort during operation.

关 键 词：急救车 车舱 噪声 降噪 

分 类 号：R318[医药卫生—生物医学工程] R197[医药卫生—基础医学]