玉米收割机NVH问题研究——基于振动总量和A计权声音

The NVH Phenomena Analysis in Corn Harvester——Based on Vibration Dose and A-meter-weight Noise

农业机械的舒适性已经严重制约了我国农业机械的进一步发展。为了改善农用车辆的NVH问题,参照国标GB/T 18697-2002和国际标准ISO 2631,成功搭建玉米收割机驾驶室的振动及噪声测量系统。同时,利用Mat Lab软件计算出振动总量和A计权声压级,得出该型号的玉米收割机的舒适性情况。田间试验表明:该测量系统工作正常、性能可靠,能够作为车载测量系统收集收割机实时工作状态,为构建玉米收割机NVH性能数据库系统和车身结构进一步改进奠定基础。

To improve the ride comfort of Agricultural machinery , based on GB/T 18697-2002 and ISO 2631 , A vibra-tion and noise testing measurement system for corn harvester was established .By using MATLAB , the processing to ac-celeration time-history series were completed .vibration dose and A-meter-weight noise were chosen to evaluate the ride comfort , vibration dose is used to evaluate the vibration and A-meter-weight noise is used to evaluate the noise .Depen-ding on the two indexes , A final evaluation on the corn harvester was made and some improve guidance were given .