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A two-dimensional structure internal acoustic performance analysis method

A two-dimensional structure and acoustic performance technology, which is applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as low computational efficiency and difficulty in accurately applying essential boundaries

Active Publication Date: 2019-04-26
HARBIN ENG UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for analyzing the internal acoustic performance of a two-dimensional structure to solve the problems of low calculation efficiency and difficulty in accurately applying essential boundaries when analyzing the sound field of an acoustic structure.

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  • A two-dimensional structure internal acoustic performance analysis method
  • A two-dimensional structure internal acoustic performance analysis method
  • A two-dimensional structure internal acoustic performance analysis method

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Embodiment Construction

[0067] The present invention will be further described below in conjunction with the accompanying drawings.

[0068] The invention belongs to the field of computer acoustic aided design, in particular to a method for analyzing the internal acoustic performance of a two-dimensional structure based on isogeometric analysis.

[0069] In the process of acoustic component design and development, computer aided design (Computer Aided Design, CAD) and computer aided engineering (Computer Aided Engineering, CAE) for simulation analysis based on numerical methods such as finite element have been inseparable. However, the geometric model obtained by CAD software cannot be directly used for finite element analysis, and must go through cumbersome operations such as geometry cleaning and network division, which not only causes the loss of geometric accuracy but also consumes a lot of time and workload. T.J.RHughes and others introduced Non-Uniform Rational B-Splines (NURBS) into finite ele...

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Abstract

The invention belongs to the field of computer acoustic aided design, and particularly relates to a two-dimensional structure internal acoustic performance analysis method, which comprises the following steps of: extracting NURBS geometric parameters representing a two-dimensional acoustic area, including a node vector, a polynomial order and a control point network; Converting the NURBS parameterto obtain a new interpolation point and an interpolation basis function; Describing an internal sound field and a partial derivative of the internal sound field in the two-dimensional area by adopting the interpolation primary function; Applying the Gauss-Lobatto integral rule to calculate the numerical integral of sound pressure in the unit parameter space [0,1]*[0,1]; Compared with a traditional finite element, isogeometric analysis does not need conventional grid division, and the acoustic performance of the structure can be analyzed under the condition that the accuracy of a geometric model is reserved, so that the analysis precision is improved.

Description

technical field [0001] The invention belongs to the field of computer acoustic aided design, in particular to a method for analyzing the internal acoustic performance of a two-dimensional structure. Background technique [0002] In the process of acoustic component design and development, computer aided design (Computer Aided Design, CAD) and computer aided engineering (Computer Aided Engineering, CAE) for simulation analysis based on numerical methods such as finite element have been inseparable. However, the geometric model obtained by CAD software cannot be directly used for finite element analysis, and must go through cumbersome operations such as geometry cleaning and network division, which not only causes the loss of geometric accuracy but also consumes a lot of time and workload. T.J.RHughes and others introduced Non-Uniform Rational B-Splines (NURBS) into finite element analysis, established a new type of finite element method with precise geometric model, and calle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 靳国永薛亚强叶天贵师康康周佳良王雪仁高晟耀
Owner HARBIN ENG UNIV
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