Reduced order modelling of elastomeric vibration isolators in dynamic substructuring

Flodén, Ola; Sandberg, Göran; Persson, Kent

doi:10.1016/j.engstruct.2017.11.001

Cited by 8 publications

(2 citation statements)

References 19 publications

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“…Hu [13] Proposed vibration mitigation method to analyze complex mechanical systems. Flodén et al [14] The elastomeric vibration isolators are modelled using dynamic substructuring method to obtain accurate and efficient model reduction. Elastomeric isolators are used as coupling element between two substructures.…”

Section: Introductionmentioning

confidence: 99%

Tactile Response Characterization of a Dynamic System Using Craig-Bampton Method

Pradeepkumar¹,

Nagaraj²

2022

Sound&Vibration

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Vibrational characteristics in small horizontal axis wind turbine system are presented in this study with a system concept called tactile response and substructuring. The main focus is on managing the dynamic properties like vibration, noise, and harshness that occur during the operational mode. Tactile response is defined as the response of subsystem which is induced when a human body touches a vibrating system. Sub structuring is a computational method used to reduce the dynamic behavior of a large complex system with a smaller number of degrees of freedom without disturbing the mesh size of the model. Sub structuring has the ability to combine numerical results along with the experimental results. Combination of substructuring and tactile response is applied in this study. Mode shapes of the system are analyzed and results obtained are correlated within this study to provide better optimization of the results. Wind turbine excited with wind energy depends on wind speed. Torsional vibration has a significant role in determining dynamic properties. Torsional vibration is caused as a result of the rotation of the turbine blade and depends on wind speed. The study gives importance to investigating the ability to simulate the numerical method and tactile response to predict and improve dynamic properties.

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Section: Introductionmentioning

confidence: 99%

Tactile Response Characterization of a Dynamic System Using Craig-Bampton Method

Pradeepkumar¹,

Nagaraj²

2022

Sound&Vibration

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“…For instance, exible multibody dynamics problems [12], problems including high-speed rotating structures [13], uid-structure interaction problems [14] and problems with localized nonlinearities, such as cracks [15], benet signicantly from model reduction. Model reduction is also useful in vibration analyses, for instance in vibration isolation modeling [16] and problems including stochastic response [17].…”

Section: Introductionmentioning

confidence: 99%

Implementing model reduction to the JuliaFEM platform

Rapo¹,

Aho²,

Koivurova³

et al. 2018

RakMek

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JuliaFEM is an open source nite element method solver written in the Julia language. This paper presents an implementation of two common model reduction methods: the Guyan reduction and the Craig-Bampton method. The goal was to implement these algorithms to the JuliaFEM platform and demonstrate that the code works correctly. This paper rst describes the JuliaFEM concept briey after which it presents the theory of model reduction, and nally, it demonstrates the implemented functions in an example model. This paper includes instructions for using the implemented algorithms, and reference the code itself in GitHub. The reduced stiness and mass matrices give the same results in both static and dynamic analyses as the original matrices, which proves that the code works correctly. The code runs smoothly on relatively large model of 12.6 million degrees of freedom. In future, damping could be included in the dynamic condensation now that it has been shown to work.

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