Advanced Numerical Methods for Mechanical System Dynamic Simulation

机械系统动态仿真的先进数值方法

• 批准号: 9815637
• 负责人: Edward Haug
• 金额: $ 19万
• 依托单位: University of Iowa
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-15 至 2001-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9815637&HistoricalAwards=false
• 关键词: Advanced; Numerical; Methods; Mechanical; System

9815637HaugThis project is carried out as a part of the NSF Research Centers - Small Firms Collaborative R&D initiative, under the leadership of the Cener for Virtual Proving Ground Simulation, an IUCRC established by the National Science Foundation.Research in the IUCRC for Virtual Proving Ground Simulation has recently led to fundamentally new numerical methods that enable accurate and efficient simulation of broad classes of mechanical systems that were previously intractable using commercial software. Stiff integrators for the differential-algebraic equations of mechanical system dynamics, based on implicit Runge-Kutta methods recently developed by the numerical analysis community, have been cre3ated in the Center that yield two orders of magnitude speed-up for stiff systems, compared to existing methods. The algorithms created have reliable error control and have the potential to effectively deal with intermittent effects that abound in industrial applications. The I/UCRC Industrial Advisory Board has instructed the Center to work with CADSI, a small business member of the Center, to transition this new technology into its DADS software product that is marketed nationally and internationally and is used extensively by Center members. The present joint work by the I/UCRC and CADSI is to jointly develop effective new numerical methods; implement and test them in the Center's open computing environment, using selected advanced computational subroutines provided by CADSI; demonstrate them on applications defined by CADSI and other I/UCRC members; and transfer them to CADSI for commercialization. The focus of the research and development is on the following important classes of industrial applications:(1) Large-scale stiff mechanical systems (e.g., vehicles, aircraft, spacecraft)(2) Intermittent effects (e.g., Coulomb friction, gears, and chains/track; contact/impact in mechanical systems; and switch-induced dynamics in power electronic drives and hydraulic drives)

9815637 Haug该项目是作为NSF研究中心-小公司合作研发计划的一部分，在虚拟试验场模拟中心的领导下进行，该中心是由美国国家科学基金会建立的IUCRC。IUCRC虚拟试验场模拟研究最近导致了全新的数值方法，使以前难以使用商业软件的机械系统的广泛类别的准确和有效的模拟成为可能。 基于数值分析界最近发展起来的隐式Runge-Kutta方法，在该中心建立了机械系统动力学微分代数方程的刚性积分器，与现有方法相比，对刚性系统的速度提高了两个数量级。 所创建的算法具有可靠的错误控制，并有可能有效地处理工业应用中大量存在的间歇性影响。 I/UCRC工业咨询委员会已指示该中心与该中心的小企业成员CADSI合作，将这项新技术过渡到其DADS软件产品中，该产品在国内和国际上销售，并被中心成员广泛使用。 目前，I/UCRC和CADSI的联合工作是共同开发有效的新数值方法;使用CADSI提供的选定高级计算子程序，在中心的开放计算环境中实施和测试这些方法;在CADSI和其他I/UCRC成员定义的应用程序中演示这些方法;并将其转移到CADSI进行商业化。 研究和开发的重点是以下重要的工业应用类别：（1）大型刚性机械系统（例如，车辆、飞机、航天器）（2）间歇性影响（例如，库仑摩擦、齿轮和链条/轨道;机械系统中的接触/冲击;以及电力电子驱动和液压驱动中的开关诱导动力学）