发动机前端附件驱动系统关键零部件的建模与设计分析方法

项目名称： 发动机前端附件驱动系统关键零部件的建模与设计分析方法

项目编号： No.51305085

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 机械、仪表工业

项目作者： 曾祥坤

作者单位： 广东技术师范学院

项目金额： 25万元

中文摘要： 张紧器和发电机单向离合解耦轮(Overrunning Alternator Decoupler, OAD)是汽车发动机前端附件驱动(Front End Accessory Drive,FEAD)系统中常用的两类减振元件:(1)张紧器能自动调节带中张力、维持带张力稳定；(2)OAD具有单向离合和减振作用，将大转动惯量电机转子的振动与FEAD系统各个轮和皮带的振动解耦。目前该两类减振元件在混合动力汽车FEAD系统中的建模分析方法的相关研究较少。项目拟研究张紧器非线性动力学建模方法；研究OAD动态特性试验、建模方法；提出FEAD系统中带有两个张紧器和一个OAD的混合动力学系统的建模方法和动态特性计算方法。项目以提出离散-连续系统组成、存在大量非线性因素的混合动力学系统的计算方法，解决附件驱动系统中存在较大惯量附件时的复杂混合动力学问题为最终目标.

中文关键词： 多楔带附件驱动系统；优化设计；耦合振动模型；迟滞回线模型；参数激励

英文摘要： Engine Front End Accessory Drive (FEAD) system is the mean of power transmission in conventional automobiles, and is a typical discrete-continuous system composed of mixed mechanical dynamics system. The emergence of hybrid technologies, specifically the belt-driven Integrated Started-generator(ISG), has placed higher demands on belt drives than ever before. The presence of an ISG in a FEAD system leading to premature belt failure. Therefore, two types of critical damping components including automatic tensioner and Overrunning Alternator Decoupler(OAD), are designed to be suitable for the FEAD system. Automatic tensioner consists of tensioner pulley, tensioner arm and torsional-spring-damping element.It maintains constant tractive tension of the belt spans adjacent to tensioner pulley. The dynamic performance of a tensioner is dependent on excitation amplitude and excitation frequency. OAD consists of a one-way clutch and a torsional-spring-damping element. Since the Moment of Inertia (MOI) of the rotor for an alternator is the largest among MOI of all pulleys in FEAD, and rotational speed of the rotor equal to two to three times the crankshaft speed, this leads to large rotational vibration of the alternator pulley and large slip ratio between belt and alternator pulley in cases of engine rapid acceleration a

英文关键词： Serpentine Belt Accessory Drive System；Optimization design；Rotary-transverse vibration coupled model；Hysteresis model；Parametric excitation