Combined semi-recursive formulation and lumped fluid method for monolithic simulation of multibody and hydraulic dynamics

Jarkko Rahikainen, Aki Mikkola, Jussi Sopanen, Johannes Gerstmayr

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)

Abstract

The use of multibody simulation tools allows complex machinery to be described in detail while still providing a solution for the system in real time. As mechanical components are often accompanied by other dynamical systems, such as hydraulics, description of each subsystem is required to fully describe the dynamics of complex machinery. A potential candidate for solving the multiphysics problem at hand is known as the unified or monolithic approach. This strongly coupled approach yields a single set of equations to be integrated and, compared to co-simulation and co-integration approaches, a relatively simple integration procedure. In this paper, a monolithic formulation for a combined simulation of multibody and hydraulic dynamics using an efficient semi-recursive formulation and the lumped fluid method is introduced. The results indicate that the proposed method shows potential for efficient simulation of combined multibody and hydraulic problems. The robustness of the multibody method is maintained when combined with the hydraulic dynamics description and higher efficiency is observed than with an equivalent global approach.
Original languageEnglish
Pages (from-to)293–311
Number of pages19
JournalMultibody System Dynamics
Volume44
DOIs
Publication statusPublished - 15 Nov 2018
MoE publication typeA1 Journal article-refereed

Keywords

  • Coupled simulation
  • Hydraulic modelling
  • Multibody system dynamics
  • Real-time simulation

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