Sensitivity-Based Substructure Error Propagation for Efficient Assembly Model Reduction

Kessels, Bas M.; Verhees, M. L. J.; Steenhoek, Alexander M.; Fey, Rhb Rob; Wouw, Nathan van de

doi:10.1007/978-3-030-75910-0_1

Cited by 1 publication

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(2) Specify the assembly accuracy requirements by choosing E c (ω) as in (9), this includes specifying frequency of interest Ω int := {ω | 0 < ω ≤ ω max } and weighting filters W c (ω) and V c (ω) for ω ∈ Ω int . (3) Compute H (j) (ω) for all j ∈ k, formulate the interconnection structure K, and determine N (ω) as in (11) for ω ∈ Ω int .…”

Section: Proposed Approachmentioning

confidence: 99%

“…Note that in the field of systems and control, such methods are referred to as modular or subsystem MOR [5,6]. However, in the field of structural dynamics, the most popular component-level approach is component mode synthesis, which has been studied since the early sixties [7] and remains an active area of research to this date [8,9]. CMS is also a projection-based approach that typically involves identifying and extracting the most important vibration modes from the component Finite Element (FE) models and then combining them in a way that accurately represents the dynamic behavior of the original assembly.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Translating Assembly Accuracy Requirements to Cut-Off Frequencies for Component Mode Synthesis

Janssen,

Besselink,

Fey

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

One of the most popular methods for reducing the complexity of assemblies of finite element models in the field of structural dynamics is component mode synthesis. A main challenge of component mode synthesis is balancing model complexity and model accuracy, because it is difficult to predict how component reduction influences assembly model accuracy. This work introduces an approach that allows for the translation of assembly model accuracy requirements in the frequency domain to the automatic selection of the cut-off frequencies for the model-order reduction (MOR) of components. The approach is based on a mathematical approach for MOR for coupled linear systems in the field of systems and control. We show how this approach is also applicable to structural dynamics models. We demonstrate the use of this approach in the scope of component mode synthesis (CMS) methods with the aim to reduce the complexity of component models while guaranteeing accuracy requirements of the assembly model. The proposed approach is illustrated on a mechanical, three-component structural dynamics system for which reduced-order models are computed that are reduced further compared to reduction using standard methods. This results in lower simulation cost, while maintaining the required accuracy.

show abstract

Section: Proposed Approachmentioning

confidence: 99%