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Optimization design method and system for improving noise transfer function

A technology of noise transmission and optimization design, applied in computing, mechanical equipment, electrical and digital data processing, etc., can solve the problems of high R&D cost and long cycle, and achieve the effect of saving R&D cost, improving body performance, and shortening R&D cycle.

Pending Publication Date: 2019-05-14
北京长城华冠汽车技术开发有限公司
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  • Claims
  • Application Information

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Problems solved by technology

Although the NVH test in the prior art is a reliable method for analyzing noise functions, the research and development costs of NVH testing for vehicles through experimental means are high and the cycle is long

Method used

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  • Optimization design method and system for improving noise transfer function
  • Optimization design method and system for improving noise transfer function
  • Optimization design method and system for improving noise transfer function

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Embodiment 1

[0033] The invention provides an optimization method for improving the noise transfer function, which is applied to terminal equipment. It should be noted that the steps shown in the flowcharts of the accompanying drawings may be implemented in a computer system, such as a set of computer-executable instructions, and that although a logical order is shown in the flowcharts, in some cases, The steps shown or described may be performed in an order different than here. Such as figure 1 As shown, the method includes the following steps:

[0034] Step S102, establishing a geometric model of the whole vehicle body of the vehicle to be optimized.

[0035] Firstly, a geometric model of the whole body of the vehicle to be optimized is established, for example, a CAD model of the whole body of the vehicle can be established in a computer-aided design (Computer Aided Design) CAD software for short. Among them, the complete body of the vehicle refers to the body of the car that is full...

Embodiment 2

[0071] The embodiment of the present invention also provides an optimal design system for improving the noise transfer function, which is mainly used to implement the optimal design method for improving the noise transfer function provided in the above-mentioned content of the embodiment of the present invention. The system provided by the embodiment of the present invention is described below Make a specific introduction.

[0072] Figure 7 It is a schematic structural diagram of an optimization design system for improving noise transfer function according to an embodiment of the present invention, which is applied to terminal equipment, such as Figure 7 As shown, the system mainly includes: a first model building module 10, a second model building module 20, a noise transfer function analysis module 30, a panel division module 40, a contribution analysis module 50, a structure optimization module 60 and a model update module 70 , wherein, specifically, the first model buil...

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Abstract

The invention provides an optimization design method and system for improving a noise transfer function. The optimization design method comprises: establishing a finite element model of a whole vehicle body and a passenger compartment sound cavity of a vehicle to be optimized; performing noise transfer function analysis on the finite element model to obtain a sound pressure level curve of a noisetransfer function; panel division is carried out on sheet metal parts, coupled with the passenger compartment sound cavities, in the finite element model to obtain a plurality of panels; analyzing a panel contribution amount and a modal contribution amount based on the peak value in the sound pressure level curve, and determining a target panel and a target mode causing a transfer function peak value; and optimizing the vehicle body structure based on the target mode and the target panel to obtain an optimized target structure, and modifying the vehicle body finite element model based on the optimized target structure. By using analysis software, the vehicle body structure influencing the noise transfer function of the whole vehicle body can be optimized on the finite element model at theinitial development stage of the whole vehicle, the vehicle body performance is improved, the research and development cost is saved, and the research and development period is shortened.

Description

technical field [0001] The invention relates to the technical field of automobile body design, in particular to an optimization design method and system for improving noise transfer function. Background technique [0002] Noise Transfer Function (NTF for short) mainly refers to the corresponding functional relationship between the input excitation load and the output noise. (Noise, Vibration, Harshness, referred to as NVH) is the main factor of performance. Whether it is the excitation from the road surface or the engine, it is finally transmitted to the occupants through the vehicle body. Therefore, the structure of the vehicle body is very important to the transmission of noise. [0003] The noise transfer function analysis is to use the whole body and the acoustic cavity of the passenger cabin as a coupling system to analyze the acoustic response generated by the loading unit excitation of the body attachment point at the human ear in the car. The noise transfer functio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCY02T10/40
Inventor 李芳杰
Owner 北京长城华冠汽车技术开发有限公司
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