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含13张CAD图纸+文档 汽车 DMF 质量 飞轮 设计 13 CAD 图纸 文档

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本科毕业设计摘 要汽车整车动力传动系统具有多个自由度，且质量、刚度和阻尼的分布并不均匀，在运行过程中会受到多种激励的作用而产生的扭转振动，从而产生振动和噪声，降低了结构强度，影响行车安全和乘坐舒适性，所以对动力传动系扭振的衰减和抑制就显得尤为重要。双质量飞轮（DMF）作为新型的扭转减振器，可较好地衰减动力传动系的扭振，本次通过对双质量飞轮的设计分析，以掌握设计方法，为实际生产生活提供建议和依据。首先，建立了不同工况下某乘用车整车动力传动系的多自由度扭振当量化模型，利用MATLAB求解扭振模型的固有频率和振型，对比分析了DMF和离合器从动盘式扭转减振器（CTD）在固有特性上的差异。结果显示，相较于CTD，DMF动力传动系的低阶模态频率普遍较小，表明DMF可以更好地降低动力传动系的低阶模态频率，有利于减少共振的发生。然后，利用ADAMS建立了整车动力传动系的动力学模型，并针对怠速和行驶工况进行动力学仿真分析。仿真结果表明，DMF具有较好的减振效果；同时，分别在怠速、匀速行驶、加速行驶和制动等四种工况下，对装备有CTD和DMF的动力传动系的减振性能进行对比分析，仿真结果均表明，DMF具有更好的减振性能。之后，利用ADAMS中的DOE模块，对DMF的转动惯量、扭转刚度和阻尼系数等3个变量进行试验设计以进行全因素虚拟仿真实验，得到了不同工况下优化参数的取值；并对优化结果进行了仿真验证，证明优化后的DMF具有更好的减振效果。最后，结合优化后的参数，并基于CATIA软件进行DMF的三维结构设计，为双质量飞轮的实际生产制造提供了有力指导。关键词： 双质量飞轮； 动力传动系； 扭转振动； 共振； 动力学仿真； DOE优化AbstractAutomotive vehicle powertrain system has lots of freedom, the distribution of quality and stiffness is uneven, there will be a variety of incentives generated by the torsional vibration in the course of the operation, resulting in vibration and noise, reducing the structural strength, affecting the driving safety and ride comfort, so the powertrain torsional vibration attenuation and suppression is particularly important. As a new type of torsional damper, Dual mass flywheel (DMF)can attenuate the torsional vibration of the powertrain better. Through the design and analysis of the dual mass flywheel, to master the design methods, which can be used to provide suggestions for the actual production and life.Firstly, a multi-degree-of-freedom torsional vibration equivalent model of a passenger vehicle powertrain is established under different working conditions. The natural frequencies and modes of the torsional vibration model are solved by MATLAB software. The differences in the inherent characteristics of DMF and clutch driven torsional damper (CTD) are compared and analyzed. The results show that the low-order modal frequency of DMF powertrain is generally small than the CTD, which shows that DMF can reduce the low-order modal frequency of the powertrain better, which is beneficial to reduce the occurrence of resonance.Then, the dynamic model of the vehicle powertrain is established by using ADAMS, and the dynamic simulation analysis is carried out for idling and driving conditions. The simulation results show that DMF has better damping effect. At the same time, the damping performance of the powertrain systems equipped with CTD and DMF is compared under the four conditions, such as idle speed, constant speed driving, accelerating driving and braking, The simulation results show that DMF has better damping performance.After, using the DOE module in ADAMS, three variables of DMF， such as rotational inertia, torsional stiffness and damping coefficient were designed to carry out all-factor virtual simulation experiment. The optimal parameters were obtained under different working conditions. The results show that the optimized DMF has better damping effect.Finally, combined with the optimized parameters, and based on CATIA software for the three-dimensional structure of DMF design, which provides a strong guide to the actual production of dual mass flywheels.Key words： Dual mass flywheel; Vehicle powertrain; Torsional vibration; Resonance; Dynamic simulation; DOE optimization目 录1绪论11.1 选题的目的和意义11.2 国内外研究现状与发展趋势概述11.2.1 国外研究现状概述11.2.2 国内研究现状概述21.2.3 双质量飞轮发展趋势概述31.3 主要研究内容42双质量飞轮关键参数的初步设计与选择52.1 转动惯量参数设计52.2 扭转刚度参数设计52.3 阻尼参数设计63整车动力传动系扭振模型的建立与分析73.1 整车动力传动系扭振模型的建立73.1.1 行驶工况下的扭振模型73.1.2 怠速工况下的扭振模型83.2 整车动力传动系固有特性分析93.2.1 整车动力传动系动力学方程93.2.2 整车动力传动系固有特性分析113.3 整车动力传动系共振工况分析193.3.1 整车动力传动系激励扭矩193.3.2 整车动力传动系共振工况分析204基于ADAMS的双质量飞轮动力学仿真分析214.1 基于ADAMS的整车动力传动系建模214.2 整车动力传动系自由振动仿真分析224.3 整车动力传动系受迫振动仿真分析244.3.1 DMF整车动力传动系仿真分析244.3.2 CTD与DMF整车动力传动系受迫振动对比275双质量飞轮参数优化325.1 行驶工况下的参数优化325.1.1 优化分析关键因素325.1.2 DOE优化分析335.1.3 试验结果分析355.2 怠速工况下的参数优化375.2.1 优化分析关键因素375.2.2 DOE优化分析385.2.3 试验结果分析395.3 优化前后的结果对比405.4 优化后的