Finite element analysis of the noise inside a mechanically excited cylinder

Petyt, M.; Lim, Seungho

doi:10.1002/nme.1620130108

Cited by 30 publications

(11 citation statements)

References 15 publications

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“…Zienkiewicz and Newton [4] and Craggs [5] detail typical formulations. However, existing formulations generally involve unsymmetric matrices (which can be made symmetric through secondary transformations) that render them difficult to incorporate in general finite element analysis programs [6,7,8].…”

Section: Introductionmentioning

confidence: 99%

A study of displacement-based fluid finite elements for calculating frequencies of fluid and fluid-structure systems

Olson

Bathe

1983

Nuclear Engineering and Design

141

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The widely-used displacement-based finite element formulation for inviscid, compressible, small displacement fluid motions is examined, with the specific objective of calculating fluid-structure frequencies. It is shown that the formulation can be employed with confidence to predict the static response of fluids. Also the resonant frequencies of fluids in rigid cavities and the frequencies of fluids in flexible boundaries are solved successfully if a penalty on rotations is included in the formulation. However, the reason for writing this paper is that problems involving structures moving through fluids that behave almost incompressibly -such as an ellipse vibrating on a spring in water -could not be solved satisfactorily, for which a general explanation is given.

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Section: Introductionmentioning

confidence: 99%

A study of displacement-based fluid finite elements for calculating frequencies of fluid and fluid-structure systems

Olson

Bathe

1983

Nuclear Engineering and Design

141

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“…The establishment of the finite element model is necessary before the free modal analysis. Due to the many parts and complex shapes of a threshing cylinder, including the interference of the mesh number, element type, mesh quality, and other factors [30], in order to obtain an accurate finite element model, it is necessary to consider the simplification of the model. Therefore, the local features, such as bolt holes, fillets, and chamfers, far smaller than the mesh size were ignored.…”

Section: Free Modal Analysis Of Finite Elementsmentioning

confidence: 99%

Vibration Analysis and Parameter Optimization of the Longitudinal Axial Flow Threshing Cylinder

Wang

et al. 2021

Symmetry

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The longitudinal axial flow threshing cylinder of the full feeding rice combine harvester is widely used in China and works with violent vibration. To explore the source of the excitation affecting the vibration and to reduce the vibration, a finite element modal analysis and multipoint input and multipoint output (MIMO) modal test were performed to solve the natural vibration characteristics. By analyzing the excitation frequency, we concluded that the main reason for the resonance was the coupling between the rotation frequency of the threshing cylinder and the first natural frequency. To avoid the influence of resonance and realize a lightweight design, we proposed a combination of size optimization and topology optimization. The second rotation orthogonal combination test was designed to analyze the first natural frequency, maximum stress, and maximum deformation of the threshing cylinder, and the threshing cylinder was reconstructed as a central symmetrical structure to balance the rotational inertia force. The field experiment results showed that the amplitudes of the optimized threshing cylinder were significantly lower than those of the original threshing cylinder. This study provides ideas for solving the vibration characteristics of rotating parts and provides an important reference for the design of vibration reduction and weight reduction of key parts in the field of agricultural machinery.

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“…However, for acoustic analysis, both FEM (Bathe, 1982;Bermudez et al, 1999;Craggs, 1972;Petyt and Lim, 1978) and boundary element method (BEM) (Bell et al, 1977;Seybert and Cheng, 1987) have been widely employed. Modal methods were also applied by Bokil and Shirahatti (1994) and Wolf (1977).…”

Section: Introductionmentioning

confidence: 99%

A coupled FE‐BE analysis of acoustic cavities confined inside laminated composite enclosures

Niyogi

Laha

Sinha

2000

Aircraft Engineering and Aerospace Technology

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Finite element analysis of the noise inside a mechanically excited cylinder

Cited by 30 publications

References 15 publications

A study of displacement-based fluid finite elements for calculating frequencies of fluid and fluid-structure systems

A study of displacement-based fluid finite elements for calculating frequencies of fluid and fluid-structure systems

Vibration Analysis and Parameter Optimization of the Longitudinal Axial Flow Threshing Cylinder

A coupled FE‐BE analysis of acoustic cavities confined inside laminated composite enclosures

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