A review of flexible multibody dynamics for gradient-based design optimization

V Gufler, E Wehrle, A Zwölfer - Multibody System Dynamics, 2021 - Springer
Abstract Design optimization of flexible multibody dynamics is critical to reducing weight and
therefore increasing efficiency and lowering costs of mechanical systems. Simulation of …

The nodal-based floating frame of reference formulation with modal reduction: How to calculate the invariants without a lumped mass approximation

A Zwölfer, J Gerstmayr - Acta Mechanica, 2021 - Springer
In a recent paper of the authors, a novel nodal-based floating frame of reference formulation
(FFRF) for solid finite elements has been proposed. The nodal-based approach bypasses …

Detection of critical mode-shapes in flexible multibody system dynamics: The case study of a racing motorcycle

E Bonisoli, D Lisitano, L Dimauro - Mechanical Systems and Signal …, 2022 - Elsevier
In multibody system models, body flexibility is introduced when the structure compliance is
not negligible for an accurate description of the system behaviour. Flexible multibody …

A concise nodal-based derivation of the floating frame of reference formulation for displacement-based solid finite elements: Avoiding inertia shape integrals

A Zwölfer, J Gerstmayr - Multibody System Dynamics, 2020 - Springer
Abstract The Floating Frame of Reference Formulation (FFRF) is one of the most widely
used methods to analyze flexible multibody systems subjected to large rigid-body motion but …

Co-rotational formulations for 3D flexible multibody systems: a nodal-based approach

A Zwölfer, J Gerstmayr - Contributions to Advanced Dynamics and …, 2019 - Springer
Rigid body models are only sufficient for rough estimates of the dynamics of real world
systems, such as machines, robots and vehicles. Although, deformations are usually small …

[PDF][PDF] A unified framework for corotational flexible multibody system dynamics formulations

A Zwölfer, J Gerstmayr - Journal of Structural Dynamics, 2023 - popups.uliege.be
Corotational formulations play an important role for flexible multibody dynamics systems,
because they reflect the nature of many technical systems undergoing arbitrarily large rigid …

Comparison of finite element methods for dynamic analysis about rotating flexible beam

Q Peng, M Li - Nonlinear Dynamics, 2023 - Springer
Dynamic analysis of flexible body under large rotation becomes increasingly important in
many engineering applications. This work takes rotating flexible beam as numerical …

Absolute coordinate formulation and generalized component mode synthesis with rigid body coordinates

A Zwölfer, J Gerstmayr - Multibody System Dynamics, 2023 - Springer
The dynamics of linearly-elastic multibody (MB) systems is conventionally modeled via the
floating frame of reference formulation (FFRF); however, its equations of motion (EOMs) …

Consistent and inertia-shape-integral-free invariants of the floating frame of reference formulation

A Zwölfer, J Gerstmayr - … Technical Conferences and …, 2020 - asmedigitalcollection.asme.org
The conventional continuum-mechanics-based floating frame of reference formulation
involves unhandy so-called inertia-shape-integrals in the equations of motion, which is why …

Centrifugal stiffening analysis of gear pair with generalized component mode synthesis and semi-analytic contact technique

T Lin, Q Peng, W Liu, B Chen - Meccanica, 2020 - Springer
Cantilever beam assumption is widely used to estimate gear flexibility for analytical
calculation of transmission error of gear pair. Similar to the rotating beam, it is supposed that …