University-Industry Cooperative Research in the Dynamics of High-Speed Machining: Senior Research Fellowship

高速加工动力学的产学合作研究：高级研究奖学金

• 批准号: 0072908
• 负责人: Emily Stone
• 金额: $ 7.22万
• 依托单位: Utah State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-01 至 2002-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0072908&HistoricalAwards=false
• 关键词: University; Industry; Cooperative; Research; Dynamics

This project supports the PI's sabbatical year at The Boeing Company. The research involves investigations of the chatter instability in high-speed machining. Chatter is a self-excited oscillation between the machining tool and the workpiece that limits productivity of machining operations, reduces the quality of the product and shortens machine tool life. Up until recently all models of chatter have been linear, with delay effects in the case of regenerative chatter. These models only partially explain the instabilities observed in the machining process. Nonlinear models are currently being developed, and have had some success in predicting behavior that may be described in part by low dimensional systems. In the aircraft industry this problem has received intense scrutiny, and the work of the P.I.'s collaborator at Boeing (Dr. E. Askari) has been in the development of finite element models for metal cutting. A union of two techniques, large scale numerical simulation and low dimensional models, is the goal of the research.This project should be viewed as part of the department's efforts to build an industrial math program, and support its newly created Master of Science in Industrial Mathematics. The lynch pin of the new degree is an industry project and summer internship, where students are brought into existing industry/faculty collaborations. The development of such collaborations will be enhanced by the PI's involvement with the scientists at The Boeing Company.This project is jointly supported by the MPS Office of Multidisciplinary Activities (OMA) and the Division of Mathematical Sciences.

该项目支持PI在波音公司的休假年。 研究内容包括高速切削中的颤振不稳定性。 颤振是加工工具和工件之间的自激振荡，它限制了加工操作的生产率，降低了产品质量并缩短了机床寿命。 直到最近，所有的颤振模型都是线性的，在再生颤振的情况下具有延迟效应。 这些模型只能部分解释在加工过程中观察到的不稳定性。 非线性模型目前正在开发中，并且在预测可以部分地由低维系统描述的行为方面取得了一些成功。 在飞机制造业，这个问题已经受到了严格的审查，PI的工作。在波音公司的合作者E。Askari）一直致力于开发金属切削的有限元模型。本研究的目标是将大规模数值模拟和低维模型两种技术结合起来。本项目应被视为该部门努力建立工业数学课程的一部分，并支持其新设立的工业数学理学硕士。 新学位的关键是一个行业项目和暑期实习，学生被带到现有的行业/教师合作中。 PI与波音公司科学家的合作将促进这种合作的发展。该项目由MPS多学科活动办公室（OMA）和数学科学部共同支持。