Abstract
In contrast to high-resolution finite element methods, a strength of multibody system models is the description of complex mechanical systems with a comparatively small number of degrees of freedom, which leads to a low computational effort. This is necessary for the analyses of multiple design variants. Hence the integration of structural models made in Abaqus into Simpack multibody system models requires the use of reduced order modeling techniques. Different levels of modeling fidelity enable the optimum balance between computation time and the depth of results to be achieved. These range from modeling the linear displacement field based on displacement mode vectors via reduced order models that capture large displacement effects up to a co-simulation with a full sized nonlinear Abaqus model. The presentation will explain some of these modeling techniques, such as the automatic selection of displacement modes, the mode selection for surface-wise interactions (contact forces), the assembly of multiple reduced finite element models into a single flexible body, the nonlinear reduction of a wind turbine rotor blade and finally the preparation of linear flexible bodies and the necessary quality checks in the structures apps of the 3DEXPERIENCE platform.
Highlights:
- Realistic simulation of mechanical systems including structural flexibility
- Fatigue & strength calculation considering the context of a mechanical system and realistic simulation scenarios
- Nonlinear structural behavior in multibody dynamic simulations
Speaker
Stefan Dietz | SIMULIA Technology Director
Stefan DIETZ’s mission is to explore and make available new multi-scale physics for structures and motion simulation, to maintain and expand existing technology. Stefan leads the team flex body analysis, which contributes to the Abaqus and the Simpack solver.
Before the acquisition of Simpack AG by Dassault Systèmes Stefan was responsible for product management, customer support, and training for flexible bodies in the multibody system code Simpack. Stefan received a Ph.D. in 1999 in aerospace engineering.
