《汽车理论》课程教学课件（英文讲稿）第6章 汽车平顺性 Ride Performance 6.1 Human Response to Vibration and Evaluation of Ride Performance（人体对振动的反应以及平顺性的评价）

Chapter6RidePerformance汽车的行驶平顺性Generalization(概述）6.1HumanResponsetoVibrationandEvaluationofRidePerformance（人体对振动的反应以及平顺性的评价）6.2StatisticPropertyofRoadSurfaceRoughness（路面不平度的统计特性）6.3SimplifyofAutomobileVibrationSystemandVibrationofSingleMassSystem（汽车振动系统的简化及单质量系统的振动

Chapter 6 Ride Performance 汽车的行驶平顺性 Generalization （概述） 6.1 Human Response to Vibration and Evaluation of Ride Performance （人体对振动的 反应以及平顺性的评价） 6.2 Statistic Property of Road Surface Roughness （路面不平度的统计特性） 6.3 Simplify of Automobile Vibration System and Vibration of Single Mass System（汽车振动系统 的简化及单质量系统的振动）

MeaningsofRidePerformance（汽车行驶平顺性含义）：AutomobileVibrationcaused by RoadSurface Roughness.Its frequency scope isabout0.5~25Hz.（路面不平度引起的汽车振动，频率范围0.5～25HZ。）

Meanings of Ride Performance (汽车行驶平顺性 含义): Automobile Vibration caused by Road Surface Roughness. Its frequency scope is about 0.5~25HZ.(路面不平度引起的汽 车振动，频率范围0.5~25HZ。)

GeneralizationEyaluation Method of RidePerformance（平顺性的评价方法）1.Accoding to comfort feeling ofpassenger：根据乘员舒适程度评价2. Automobile vibration system anditsevaluationindex：汽车振动系统及其评价指标

Evaluation Method of Ride Performance（平顺性的评价方法) ： 1.Accoding to comfort feeling of passenger:根据乘员舒适程度评价 2. Automobile vibration system and its evaluation index:汽车振动系统及 其评价指标 Generalization

Vibration SystemInput:elastic element.Road Surfacedamp elementRoughness,mass of body,wheelSpeedEvaluation Index:Output:weighted accelerationbody acceleration,dynamic deflection ofroot mean square value,+probability of bumpsuspension springsuspension stop blockdynamic load betweendriving safetywheel and road surface

elastic element, damp element mass of bod , y,wheel Vibration System: dynamic deflection of suspensi body acceleration dynamic load between wheel on spr and r ing, oad surfac , e Output: weighted acceleration root mean square valu probability of bump suspension stop bl e, driving sa oc fe k, ty Evaluation Index: Road Surface Roughness Input: , Speed

振动系统输入弹性元件路面不平度阻尼元件车速车身、车轮质量输出评价指标车身传至人体的加速加权加速度均方根值撞击悬架限位概率悬架弹簧动挠度行驶安全性车轮与路面间的动载

输入 路面不平度 车速 振动系统 弹性元件 阻尼元件 车身、车轮质量 输出 车身传至人体的加速 悬架弹簧动挠度 车轮与路面间的动载 评价指标 加权加速度均方根值 撞击悬架限位概率 行驶安全性

6.1ResponsetoVibrationofHumanandEvaluationofRidePerformance（人体对振动的反应以及平顺性的评价）1.Responseto VibrationofHuman:Response to Vibrationof Human is determined byfrequency频率；intensity强度；actingdirection作用方向：exposuretime暴露时间。IS02631-1:1997(E).MechanicalvibrationandshockEvaluation of human exposure to whole-bodyvibration一Part1:General requirement《人体承受全身振动评价一一第一部分：一般要求》GB/T4970-2009.Method of random input runningtest--Automotiveridecomfort《汽车平顺性随机输入行驶试验方法》

6.1 Response to Vibration of Human and Evaluation of Ride Performance （人体对振动的反应以及平顺性的评价） 1. Response to Vibration of Human: Response to Vibration of Human is determined by  frequency频率；  intensity强度；  acting direction作用方向；  exposure time暴露时间。  ISO2631-1:1997(E).Mechanical vibration and shock——Evaluation of human exposure to whole￾body vibration－Part1:General requirement《人体承 受全身振动评价——第一部分：一般要求》  GB/T4970-2009. Method of random input running test-Automotive ride comfort 《汽车平顺性随机输入 行驶试验方法》

ExposureLimit暴露极限：Humanisinhealth and safety while vibration intensity iswithinExposureLimitFatigue-WorkEfficiencyDecrease&Limit疲劳一工效降低界限：Humancanbesensitive to drive while vibration intensity iswithin this limit.ComfortDecreaseLimit舒适降低界限：Human can eat, read and write easily whilevibration intensity is within this limit

 Exposure Limit 暴露极限：Human is in health and safety while vibration intensity is within Exposure Limit.  Fatigue- Work Efficiency Decrease Limit疲劳－工效降低界限：Human can be sensitive to drive while vibration intensity is within this limit.  Comfort Decrease Limit舒适降低界限： Human can eat，read and write easily while vibration intensity is within this limit

暴露极限：当人体承受的振动强度在此界限内，将保持人的健康或安全。它作为人体可承受振动量的上限疲劳一工效降低界限：当人承受的振动强40度在此界限内时，能准确灵敏地反应，正常地进行驾驶。它与保持人的工作效能有关。舒适降低界限：在此界限之内，人体对所暴露的振动环境主观感觉良好，能顺利地完成吃、读、写等动作。它与保持人的舒适有关

暴露极限：当人体承受的振动强度在此界 限内，将保持人的健康或安全。它作为人 体可承受振动量的上限。 疲劳－工效降低界限：当人承受的振动强 度在此界限内时，能准确灵敏地反应，正 常地进行驾驶。它与保持人的工作效能有 关。 舒适降低界限：在此界限之内，人体对所 暴露的振动环境主观感觉良好，能顺利地 完成吃、读、写等动作。它与保持人的舒 适有关

Equivalenttime curvem/ sacceleration rootvertical directionmean square valuet.m/shorizontal directionacceleration rootmean square value不f

vertical direction c f c f 2 m s/ t c  t c  Equivalent time curve horizontal direction acceleration root mean square value acceleration root mean square value 2 m s/

10.01.08）/s(25.00.51min16min24 min1.00.12.5h4h0.50.058h0.16.363.00.41.02.54.00.631.610.016.025.040.080.00.30.30.88.020.030.050.02.03.05.012.51.251/3倍频中心频率f./Hzvertical direction

vertical direction