An Efficient Approach to the Simulation of Acoustic Radiation from Large Structures with FEM

Zarnekow, Marc; Ihlenburg, Frank; Grätsch, Thomas

doi:10.1142/s2591728519500191

Cited by 9 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As we all know, the main numerical methods to study acoustic radiation and scattering are the finite element method (FEM) [1][2][3][4] and the boundary element method (BEM) [5][6][7]. The FEM is a general method for solving mathematical and physical equations.…”

Section: Introductionmentioning

confidence: 99%

A Modified Formulation of Singular Boundary Method for Exterior Acoustics

Wu¹,

Fu²,

Min³

2023

Computer Modeling in Engineering &Amp; Sciences

View full text Add to dashboard Cite

This paper proposes a modified formulation of the singular boundary method (SBM) by introducing the combined Helmholtz integral equation formulation (CHIEF) and the self-regularization technique to exterior acoustics. In the SBM, the concept of the origin intensity factor (OIF) is introduced to avoid the singularities of the fundamental solutions. The SBM belongs to the meshless boundary collocation methods. The additional use of the CHIEF scheme and the self-regularization technique in the SBM guarantees the unique solution of the exterior acoustics accurately and efficiently. Consequently, by using the SBM coupled with the CHIEF scheme and the self-regularization technique, the accuracy of the numerical solution can be improved, especially near the corresponding internal characteristic frequencies. Several numerical examples of two-dimensional and threedimensional benchmark examples about exterior acoustics are used to verify the effectiveness and accuracy of the proposed method. The proposed numerical results are compared with the analytical solutions and the solutions obtained by the other numerical methods.

show abstract

Section: Introductionmentioning

confidence: 99%

A Modified Formulation of Singular Boundary Method for Exterior Acoustics

Wu¹,

Fu²,

Min³

2023

Computer Modeling in Engineering &Amp; Sciences

View full text Add to dashboard Cite

show abstract

“…The point source method is a numerical calculation of the Rayleigh integral for piston type sources, which greatly simplifies the complexity of the calculation [17,18]. Compared with the acoustic calculation methods such as finite element [19] and boundary element [20] proposed later, the point source method saves the trouble of associating a larger number of systems of equations. However, due to a large number of sampling points, the point source method is time-consuming.…”

Section: Introductionmentioning

confidence: 99%

Fast Calculation of Acoustic Field Distribution for Ultrasonic Transducers Using Look-Up Table Method

et al. 2022

Applied Sciences

View full text Add to dashboard Cite

The point source superposition method based on the Rayleigh integral model is time-consuming for calculating the three-dimensional spatial sound field. In this paper, the look-up table method is introduced into the calculation of the acoustic field to reduce the computational effort. Based on the region of synchronous vibration on the transducer, a sub-regional look-up table method is proposed. Simulations demonstrate that both the acoustic field look-up table (ALUT) method and the acoustic field sub-regional look-up table (ASLUT) method have the same acoustic field calculation results as the point source method. Regarding the cost of time, the acoustic field look-up table method takes only one third of the time of the point source method, and the acoustic field sub-region look-up table method takes only one eighteenth of the time of the point source method, with the possibility of further reduction. Both the ALUT and ASLUT methods significantly reduce the calculation time for different types of transducers, which is beneficial for the study of planar sound source devices.

show abstract

“…The overall goal is to model and identify the acoustic transfer paths from vibrational sources, like the gear box, to radiating components of the turbine, like the blades or the nacelle cover. From this a further goal is to find efficient design measures to reduce the radiation of tonal noise, see Ihlenburg et al [1] and Zarnekow et al [2]. Despite the special focus on wind turbines, our approach is general and can be employed in other engineering applications as well where large-scale structures consisting of many components are considered.…”

mentioning

confidence: 99%

Development of large-scale finite element models for vibroacoustic analysis

Grätsch,

Zarnekow,

Ihlenburg

Proceedings of the Eleventh International Conference on Engineering Computational Technology

View full text Add to dashboard Cite

The development and analysis of large-scale finite element models is an important step in engineering product development in order to obtain reliable and accurate solutions of the related physical problem. It is a particular challenge when either structures are very large and consist of many single components that are connected at interfaces, or when dynamic analysis is involved where a sufficient fine mesh resolution is required depending on the underlying frequency range.

show abstract

An Efficient Approach to the Simulation of Acoustic Radiation from Large Structures with FEM

Cited by 9 publications

References 6 publications

A Modified Formulation of Singular Boundary Method for Exterior Acoustics

A Modified Formulation of Singular Boundary Method for Exterior Acoustics

Fast Calculation of Acoustic Field Distribution for Ultrasonic Transducers Using Look-Up Table Method

Development of large-scale finite element models for vibroacoustic analysis

Contact Info

Product

Resources

About