Frequency Based Substructuring with the Virtual Point Transformation, Flexible Interface Modes and a Transmission Simulator

Pasma, E. A.; Seijs, M. V. van der; Klaassen, Steven W. B.; Kooij, M. W. van der

doi:10.1007/978-3-319-74654-8_18

Cited by 9 publications

(1 citation statement)

References 3 publications

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“…For example, an X-block attachment was used to allow the measurement of rotational FRF at a component in order to perform a successful structural modification of a helicopter tail [15]. Another approach that had been used was to attach a known model of T-block mass at the interface of the experimental substructure in order to bring more FRF peak towards lower modes [16,17]. Later, the numerical model of the T-block was decoupled in order to expand and obtain the rotational FRFs at the interfaces.…”

Section: Introductionmentioning

confidence: 99%

Frequency Based Substructuring for Structure with Double Bolted Joints: A Case Study

Mirza

Rani

Yunus

et al. 2019

IJAME

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Adopting dynamic substructuring schemes is a common practice in the field of structural dynamics, where the dynamic behaviour of a structure is predicted by combining the multiple subsystems that are analysed individually. This paper investigated the dynamic behaviour of a structure with doubled bolted joints using the frequency based substructuring (FBS) method. In the attempt, the substructures were combined with the frequency domain that can be numerically derived or experimentally measured. However, the applicability of this method suffered from several issues where most of them were related to the frequency response function (FRF) of the rotational degree of freedom (DOF) at the subsystem’s interface. In some cases, the system’s interface vibrated in the rotary motion of certain modes, for instance, a car side rear view mirror. Therefore, excluding the rotational FRF during the coupling process could lead to a completely different result. This paper presents the use of the FBS method for a structure with double bolted joints by using the equivalent multipoint constraint (EMPC) method through which rotational DOFs can be completely neglected. The actual tested structure for this study was an assembled structure consisting of two substructures: a simple beam and an irregular plate steel structure. The FRFs of both substructures were derived from using the FRF synthesis from finite element models and combined together via the FBS method. This study reveals that the use of the FBS method with the EMPC method for a structure double bolted joints has led to very promising results.

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Section: Introductionmentioning

confidence: 99%