基于山地果园路谱的轮式运输车钢板弹簧悬架优化设计  

Optimization design of mountainous orchard transporter's leaf spring suspension based on mountainous orchard road spectrum

作　　者：吴伟斌[1,2] 李泽艺 洪添胜 刘文超[1] 黄家曦 余耀烽 WU Weibin;LI Zeyi;HONG Tiansheng;LIU Wenchao;HUANG Jiaxi;YU Yaofeng(College of Engineering,South China Agricultural University,Guangzhou 510642,China;Division of Citrus Machinery,China Agriculture Research System/Guangdong E&T Research Center for Mountainous Orchard Machinery,Guangzhou 510642,China)

机构地区：[1]华南农业大学工程学院,广州510642 [2]国家柑橘产业技术体系机械研究室/广东省山地果园机械创新工程技术研究中心,广州510642

出　　处：《华中农业大学学报》2018年第4期7-14,共8页Journal of Huazhong Agricultural University

基　　金：公益性行业(农业)科研专项合作研究任务(201403036);广东省现代农业产业技术体系创新团队-茶叶产业创新团队设施与机械化岗位专家(2017LM1093);广东省省级科技计划项目(2017A090905020);"十二五"农村领域国家科技计划课题研究子任务(2014BAD16B0103)

摘　　要：为提高山地果园轮式运输车的运输效率和疲劳寿命,以丘陵山区典型路面不平度激励信号为振动激励,研究钢板弹簧悬架的振动特性并进行结构优化。系统以LabVIEW为上位机平台,通过数据采集卡NI 9234和加速度传感器PCB 352C33设计加速度信号采集系统,对原始加速度信号滤波处理后再进行积分和FFT变换得到位移频域图。将采集到的路面不平度激励信号导入ADAMS/VIEW中,得出山地果园轮式运输车在丘陵山区草地、山地和水泥地运行时,路面不平度激励信号在钢板弹簧悬架处作用的频率主要集中在3~10、4~9和2~7Hz,与原悬架第一阶频率5.95Hz存在重叠容易产生共振,疲劳寿命T为9.4×10~4。增加簧片数量可以提高悬架的刚性,优化后悬架第一阶频率为18.59Hz,疲劳寿命T为3.5×105,避免了与路面输入激励产生共振且疲劳寿命提高了3.7倍。In order to improve the fatigue life and transportation efficiency of mountainous orchard wheeled transporter,the excitation signal of the unevenness of typical road surface in hilly areas was used as vibration excitation to study the vibration characteristics of the leaf spring suspension and optimize the structure.Using LabVIEW as the host computer platform,the data acquisition card NI 9234 and acceleration sensor PCB352C33 was used to design the acceleration signal acquisition platform.After filtering the original acceleration signal,integral and FFT transform was performed to obtain the displacement frequency domain map.The road roughness signal collected was imported into ADAMS/View to get the roughness of the road surface when the transporter runs on the grass,mountainous and cement road.The frequency of the excitation signal acting on the leaf spring suspension mainly concentrates in 3-10 Hz,4-9 Hz and 2-7 Hz.There is an overlap with the first-order leaf spring suspension at the first-order frequency of 5.95 Hz,and resonance is easily generated.The fatigue life T is 9.4×10 4.By increasing the number of reeds to increase the stiffness of the suspension,the first-order frequency of the leaf spring suspension is optimized to be 18.59 Hz,and the fatigue life T is 3.5×10 5,which not only avoids resonance with the road surface input excitation but also increases life expectancy by 3.7 times.

关 键 词：山地果园 运输车 结构优化 LabVIEW 弹簧悬架 振动分析 模态分析 

分 类 号：S24[农业科学—农业电气化与自动化] S237[农业科学—农业工程]