A receptance-based method for frequency assignment via coupling of subsystems

Tsai, Sung-Yu; Chang, Jui‐Yoa

doi:10.1007/s00419-019-01619-9

Cited by 8 publications

(7 citation statements)

References 27 publications

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“…A structural modification does not require sensors and actuators and is inexpensive and is applicable to large structures. 29 In general, physical models 30,31,32,33 or modal models 34,35 of structures can be employed for inverse structural modification. However, for a complex structure, the theoretical model (usually a finite element model) is often simplified, often causing a modal truncation problem.…”

Section: Introductionmentioning

confidence: 99%

A new general method for assigning frequencies with low spillover through structural modifications

Liu

Pang

Ouyang

et al. 2023

Journal of Low Frequency Noise, Vibration and Active Control

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By modifying the mass and stiffness parameters of a structure, a subset of its natural frequencies can be assigned. However, such an assignment is usually accompanied with changes of the remaining frequencies, known as ‘spillover’. Eigenvalue or frequency spillover often needs to be avoided in engineering. In this paper, a new and general method is proposed for assigning a subset of the natural frequencies of a structure with a low level of spillover through structural modifications. The method combines a multi-population genetic algorithm and a radial basis function neural network and is implemented in a MATLAB-PYTHON-ABAQUS data interaction system. It is suitable for theoretical models (for example, finite element models) of general structures. By means of three numerical examples, the ability of the method to assign subsets of frequencies to discrete and discretised continuous structures while maintaining low spillover is demonstrated.

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Section: Introductionmentioning

confidence: 99%

A new general method for assigning frequencies with low spillover through structural modifications

Liu

Pang

Ouyang

et al. 2023

Journal of Low Frequency Noise, Vibration and Active Control

Self Cite

View full text Add to dashboard Cite

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“…13,15 Such as the impedance coupling method in rotative system, depend on each substructure FRFs, was applied to pump in Choi and Park. 15 In other hand, Tsai et al 2 investigated the frequency problem through subsystem coupling via structural modification of one of its subsystems.…”

Section: Introductionmentioning

confidence: 99%

“…This method has been used to minimize the size of computational problem and the complexity of dynamic models. Some techniques of Frequency Based Sub-structuring (FBS), like coupling method, were suggested in Roy and Craig, 1 Tsai et al 2 Similar to coupling strategies, the decoupling techniques are created for a known assembled system to detect one of the subsystems. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Usually, the methodology of DS as coupling method is implemented to finite element models with high number of DoFs.…”

Section: Introductionmentioning

confidence: 99%

FRF of a coupled geared system using the frequency based substructuring and condensation methods

Bouslema

Frikha

Fakhfakh

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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Power transmission systems are complex systems and their dynamic investigation requires much more CPU and computation time. For the purpose of studying the complicated global dynamics, the reduction approach is applied to simplify the complexity of connected problem. This work details the coupling technique and the identification of dynamic compartment of transmission system, from a known dynamic response of distinct multibody subsystems. The identification of transmission system was built by joining subsystem using the Frequency Response Function (FRF). This paper discusses the Frequency Based Sub-structuring (FBS) and the condensation methods. A description of these techniques and their importance were displayed. This approach was tested on a discrete system describing a dual stage reducer using receptance coupling. A parametric study was made to determine the sensitivity of the sub-structuring method by varying different parameters. In addition, the sensibility of random perturbation of coupling stiffness on the sub-structuring method was studied. The achieved results obtained by the coupling and the condensation approach were evaluated. The impact of reducer properties on subsystem response and the effect of neighbor parameter system on condensation methods were discussed. A great correspondence is shown between the simulated coupling technique and the full system results.

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“…Recently, the singularity issue was implemented by El Mahmoudi et al [10] while considering the flexible connection by means of substructures inside the (LM-FBS) coupling procedure. In addition, Tsai [11] tackled the problem of frequency assignment through coupling of subsystems using the receptance method.…”

Section: Introductionmentioning

confidence: 99%

Effect of elastic couplings on the dynamic behavior of transmission systems

Bouslema¹,

Fakhfakh²,

Nasri³

et al. 2022

Comptes Rendus. Mécanique

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The aim of the present work is to analyze the sensibility of an elastic coupling on the coupled Frequency Response Functions (FRFs) of transmission mechanical systems. The FRF of a linked system, such as a reducer stage, is determined by a receptance coupling (RC) method. The equilibrium and the compatibility conditions are applied.This method is investigated for different coupling models such as rigid and flexible. The proposed method is validated by a direct computation of the full system showing exact agreement.Afterward, the effect of a rigid and a joined system on the sub-structuring response FRFs is analyzed. The coupling models derived from literature review are discussed to show their effects on FRF. Although the coupling in question is considered to be a flexible interface in the aforementioned system, as revealed in the literature review, it introduces a translational and rotational damping and stiffness. So, the formulation of the RC is different from the standard approach. In order to achieve the aim of the present work, the effects of some important parameters such as translational and rotational coupling, shaft and bearing stiffness on the FRF are discussed. Some sensitivity of the proposed models are observed in relation to the coupling parameters.

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A receptance-based method for frequency assignment via coupling of subsystems

Cited by 8 publications

References 27 publications

A new general method for assigning frequencies with low spillover through structural modifications

A new general method for assigning frequencies with low spillover through structural modifications

FRF of a coupled geared system using the frequency based substructuring and condensation methods

Effect of elastic couplings on the dynamic behavior of transmission systems

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