Dynamics simulation of large-scale multibody systems

大型多体系统动力学仿真

• 批准号: 470027-2014
• 负责人: Kövecses, Jozsef
• 金额: $ 10.05万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=577496
• 关键词: Dynamics; simulation; large; scale; multibody

Contact is of central importance in mechanics; it is also the key element in many applications of modelling and simulation technologies, and virtual environments. A particularly challenging problem is the simulation of the operation of large articulated mechanical systems that come to physical interaction with their environment. This usually induces contact simultaneously at many different locations in the system; while the bilateral constraints that model the articulations among the system elements also need to be maintained. Examples include the development of virtual environments for operations of large cranes moving cargo in an out of ships, excavators generally employed in the mining industry. We specifically plan to address four main topics for these problems grouped in three work packages. The first is the investigation of the use of nonlinear optimization algorithms for contact problems. We particularly aim at the analysis of possibilities that avoid the discretization of the friction cone. The second main element of the work will be the study of model partitioning and substructuring to ensure efficient implementation, which can also achieve real-time performance. The third topic is the simulation of elastically articulated chains of rigid bodies, where a focus point is to tackle the problems that can from changing the number of segments and the presence of high tensile forces. The fourth element is the detailed study of redundant constraint configurations and the solution of related simulation problems. We expect that the results of the work will produce important research findings that will strongly contribute to the Canadian economy. The simulations and virtual environments industry has strong roots in Quebec. The expected results will further strengthen this industrial sector, and will generate the basis for new business opportunities and contribute to the creation of new jobs. This will be of significant benefit to our partners, CMLabs Simulations Inc., and Simwat and the Canadian society at large. Research training will be an important element of the work.

接触在力学中是至关重要的；它也是许多建模和仿真技术以及虚拟环境应用中的关键元素。一个特别具有挑战性的问题是模拟大型铰接机械系统的操作，这些系统与环境发生物理相互作用。这通常会在系统的许多不同位置同时引起接触；同时还需要维护对系统元素之间的衔接进行建模的双边约束。例子包括开发虚拟环境，用于大型起重机的操作，在船上移动货物，采矿行业通常使用的挖掘机。