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Method for improving precision of solving automobile wind noise based on SNGR method

A wind noise and automobile technology, applied in the field of improving the accuracy of automobile wind noise based on the SNGR method, can solve the problems of low precision of pulsation items and inability to accurately solve automobile aerodynamic noise, and achieve accurate prediction, shorten development cycle, and save development costs Effect

Active Publication Date: 2020-02-04
CHINA FIRST AUTOMOBILE
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Problems solved by technology

However, the accuracy of the pulsation term of the SNGR method itself is low, and it cannot accurately solve the vehicle aerodynamic noise

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  • Method for improving precision of solving automobile wind noise based on SNGR method

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Embodiment Construction

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0033] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...

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Abstract

The invention relates to the technical field of wind noise simulation, and discloses a method for improving the precision of solving automobile wind noise based on SNGR, and the method comprises the following steps: S1, building an initial automobile and wind tunnel model, and carrying out the gridding of the model; s2, performing steady-state calculation and transient-state calculation on the model in sequence to obtain a steady-state calculation result and a first transient-state calculation result of the flow field; s3, obtaining a first pulsation term according to the steady-state calculation result and the first transient calculation result; s4, comparing the first pulsation term with a second pulsation term of the SNGR to obtain a correction factor of the second pulsation term; and S5, obtaining a second transient calculation result according to the correction factor, and applying the second transient calculation result to the creation of a sound field to complete wind noise acoustic calculation. According to the method, prediction of the automobile wind noise is more accurate, a more accurate wind noise simulation result can be provided for early whole automobile modeling development, the operation process adaptability is wide, the development period of an automobile can be shortened, and the development cost is saved.

Description

technical field [0001] The invention relates to the technical field of wind noise simulation, in particular to a method for improving the accuracy of solving automobile wind noise based on the SNGR method. Background technique [0002] The existing wind noise simulation is based on the transient calculation of the external flow field to construct the sound source of the flow field. The calculation period is long, and the demand for computing hardware resources is large, which cannot meet the pace of product development. The simulation period of the whole vehicle wind noise is about 3 weeks, depending on the calculation Hardware resources and maximum solution frequency. If the SNGR method is used, based on the steady-state calculation of the external flow field, the calculation period is shortened to within 3 days, but the calculation accuracy is lost. [0003] Usually, the calculation of wind noise includes two parts: the calculation of the external flow field of the vehicl...

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Application Information

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IPC IPC(8): G06F30/20G06F30/15
CPCY02T90/00
Inventor 潘作峰邓玉伟刘英杰马龙
Owner CHINA FIRST AUTOMOBILE
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