[Objective]Air compressor is one of the main sources for metro vehicle vibration excitation.Reasonable mo-dal matching design for air compressor is conducive to reducing the vehicle body vibration and noise,thereby improving the riding comfort of the vehicle.[Method]A finite element model of air compressor and its frame is established by using ANSYS finite element software.The influence of the two-stage vibration reduction suspension method for metro vehicle air compressor on its modal parameters is calculated and analyzed,and the above-mentioned suspension method between air com-pressor and its frame is optimized in the design.[Result &Conclusion]For the air compressor with a two-stage vibration reduction system,unreasonable suspension method is likely to cause the modal frequencies of air compressor and its frame close to the excitation frequency of the compressor,thus resul-ting in resonance.When rubber is adopted for the first-stage vi-bration reduction between the motor end,the compressor end and the frame,and rigid connection adopted for the second-stage vibration reduction between the air compressor frame and the vehicle body mounting seat,the modal frequencies of air compressor and its frame can effectively avoid excitation fre-quency of the air compressor,preventing the violent vibration of air compressor and its frame caused by the coincidence of the excitation frequency and the modal frequency.
关键词
地铁/车辆/空气压缩机/吊挂方式/模态参数/减振形式
Key words
metro/vehicle/air compressor/suspension method/modal parameters/vibration reduction form
维普
万方数据