Torsional Vibration and Gear Rattle in Automotive Manual Transmissions

这项GOALI/IUCP(产学合作项目)是New Venture Gear Inc.(密歇根州特洛伊)的联合研究项目。它开发了模型、分析和设计技术，用于减少乘用车和轻型卡车手动变速器中的扭转振动和消除齿轮发出的响声。当发动机扭矩波动时，齿轮通过空载啮合齿隙撞击齿轮而产生响声。扭振的复杂性和手动变速器的各种非线性(如间隙、摩擦滞后和多级刚度)给扭振特性和齿轮颤振行为的分析提出了许多挑战。GOALI/IUCP调查的重点是全面了解扭转振动和齿轮发出的响声特性。通过发展一种新的强大的数值分析技术，时间域有限元(FET)为强非线性系统的性能评估和参数研究提供了有效的建模和仿真能力。这种建模能力被用来开发计算机工具，供设计工程师使用，以发现可行的常规改进并优化动力总成配置。此外，计算机分析工具还集成在克莱斯勒的车辆动力总成技术中，例如带有控制打滑的自动离合器。该项目提供了一个独特的机会，将学术环境中可用的基础研究方面的强大专业知识与克莱斯勒广泛的实验和产品开发相结合。在克莱斯勒研究基金的支持和8人团队的参与下，这一合作进一步加强了已建立的合作伙伴关系，通过相互访问、学生暑期实习和合作实验，扩大了行业和大学的互动，使大学研究人员能够在解决严重的现实应用问题的同时，提高他们的研究重点。

This GOALI/IUCP (Industry-University Collaboration Project) is a joint research program between the New Venture Gear Inc. (Troy, MI). It develops modeling, analysis and design techniques for the reduction of torsional vibration and the elimination of gear rattles in manual transmissions of passenger cars and light trucks. Gear rattle is produced by the impacting of gear teeth through their unloaded mesh backlash as a response to engine torque fluctuations. The complexity of torsional vibrations and various nonlinearities (e.g., backlash, friction hysteresis, and multi-stage stiffness) of manual transmission present many challenges for the analysis of torsional vibration characteristics and gear rattle behavior. This GOALI/IUCP investigation focuses on a comprehensive understanding of the torsional vibration and gear rattle characteristics. Through the development of a new and powerful numerical analysis technique, finite elements in the time domain (FET) an efficient modeling and simulation capability is attained for performance assessments and parametric studies of the strongly nonlinear system. This modeling capability is utilized to develop computer tools to be used by the design engineers to discover; feasible conventional improvements and to optimize powertrain configuration. Furthermore, the computer analysis tools are integrated within Chrysler's vehicle powertrain technologies such as the automated clutch with controlled slip. This project provides a unique opportunity to combine the strong expertise in basic research available in academic settings and the Chrysler's extensive experimentation and product development. With Chrysler's support of research funds and the participation of a 8-member team, this collaboration further strengthens an established partnership with expanded industry-university interactions through mutual visits, student summer internships, and collaborative experiments, allowing the university researchers to sharpen their research focus while tackling a serious real-world application problem.