0

Full Content is available to subscribers

Subscribe/Learn More  >

Hybrid-Parallel Calculation of Jacobians in Multi-Body Dynamics

[+] Author Affiliations
Jan Clauberg, Michael Leistner, Heinz Ulbrich

Technische Universität München, Garching, Germany

Paper No. DETC2013-12245, pp. V07AT10A023; 9 pages
doi:10.1115/DETC2013-12245
From:
  • ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 7A: 9th International Conference on Multibody Systems, Nonlinear Dynamics, and Control
  • Portland, Oregon, USA, August 4–7, 2013
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5596-6
  • Copyright © 2013 by ASME

abstract

Implicit integration methods are often used for numerically stiff multi-body systems in order to reduce the timestep-size. But within most implicit integration methods, the jacobian of the right hand side must be calculated at every step. In case of multi-body dynamics, this is the vector of generalized forces and the calculation of its jacobian can be so expensive, that it often outweighs the advantage of a bigger step-size. For large systems, this task can take more than 99% of the whole simulation time, while it can be easily parallelized. In this paper, a hybrid-parallel implementation of calculating this jacobian is presented. With a combination of MPI and OpenMP, simulations on up to 512 cores are run. The experiments are carried out on a high-performance-computing cluster with an infiniband network. The performance of a pure MPI implementation is compared to several hybrid variants, using different numbers of OpenMP threads per process.

Copyright © 2013 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In