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利用MatLab-Simulink 仿真了不同减振器阻尼系数和不同悬架刚度下车身加速度、悬架动挠度、车轮动载分别对于路面速度激励振动响应的幅频特性, 从而为半主动悬架和主动悬架的优化提供必要的理论支持.关于汽车振动与MATLAB的案例，大家都可以下载看看，3M at lab472基于 Simulink车辆振动响应幅频特性分析SimulinkAdd2To WorkspaceSS1/m, Integrator Integrator/ Too Workspace2Add1kAddkAdd3 1/m Integrator IntegratorTo Workspace 1Add4Derivative To Workspace3RandomTo WorkspaceNumberSimulink2.22000N/(m/s)k16300N/m100001000N/(m/s)N/m6、721994-2014ChinaAcademicJournalelEctronicPublishinghoUseAllrightsreservedhttp://www.cnki.net°48°2011……计计……c=1000N/(m/s)Fi……+…+-计+……+…==c=2000Nm/s)k=16300N/m4+=k=10000N/m4-…今…+---…4-}-4-11艾也÷…+-10:::10激振频率H10激振频率|H图3车身加速度对于路面速度激励的幅频特性图6车身加速度对于路面速度激励的幅频特性c=1000N(m/s=·c=2000N/(m/s)10°…1…1-三馨}-1-44}H4k=16300N/mk=10000N/m101010激振频率/Hz激振频率|Hz图4车轮动载对于路面速度激励的幅频特性图7车轮动载对于路面速度激励的幅频特性:C=1000N(m/s)k=16300N/m空…::=200m0)1A#:k=1000Nm10鞋装1°目非…4…暮10目……10时时排时计e时:10101010101010微振频率|Hz激振频率Hz图5悬架动挠度对于路面速度激励的幅频特性图8悬架动挠度对于路面速度激励的幅频特性?1994-2014ChinaAcademicJournalElectronicPublishingHouseAllrightsreservedhttp://www.cnki.net3M at lab493结语1/4Simulink[η靳跷雄.汽车振动分杌M].上海:同济大学出版社,2002:92-9[2余志生.汽车理谢M].北京:机械工业出版社,2006230-232[3丁玉庆.汽车振动系统的简化及数学模型的建立[J.南京理工大学学报,2001,25(4:391-394[4朱明武,李永新测试信号处理与分析[M].北京:北京航空航天大学出版社,206:92-10S李丽莉,过永德汽车振动系统的简化及其响应模拟].华北工学院学报,195,16(2):147-149.[常巍,谢光军,黄朝风. Matlab2007基础与提髙M].北京:电子工业出版社,2007:253-257.Amplitude- requency Characteristic Analysis of Vehicle vibrationResponse Based on MatlabChEN Jun-ie li Zhao-kai, fan Chuan-shuai, LIU WeiChang an University, Xi an 710061, China)Abstract: In order to research amplitude- frequency characteristic of vehicle vibration response, using the lagrange equation to establish quarter vehical geometry model and design the simulation prog ram in Simulink according to the abovemathematical model. The result s indicate that the proper increasing of shock absorber damping can effectively reduce thedy namic load between the wheels and pavement. But, the increasing of Suspension s tiffness makes the ride comfort go badThe conclusion of this paper can provide some reference value with which can improve the vehicle smooth and safetyKey words: vehicle vibralion; vehicle running smo othness; MalLab-Simulink; am plitude-requency characteria tic?1994-2014ChinaAcademicJournalElectronicPublishingHouseAllrightsreservedhttp://www.cnki.net
