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Cooling system modal frequency identification method and test tool

A cooling system and modal frequency technology, applied in the field of cooling system modal frequency identification method and test tooling, can solve problems such as inability to effectively avoid resonance risks, difficult calculation of shock absorbing pads, and difficult calculation of equivalent dynamic stiffness

Pending Publication Date: 2021-12-17
JIANGLING MOTORS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the cooling system in the vehicle state is difficult to calculate the compression of the shock pad due to gravity, and the calculation of the actual equivalent dynamic stiffness is relatively difficult, resulting in a large difference between the CAE analysis results and the actual modal results, and it is impossible to quickly and accurately identify the cooling system. The modal frequency of the system cannot effectively avoid the resonance risk caused by the coupling with the engine idle speed

Method used

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  • Cooling system modal frequency identification method and test tool
  • Cooling system modal frequency identification method and test tool
  • Cooling system modal frequency identification method and test tool

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Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1 of the present invention provides a cooling system modal frequency identification method, the identification method includes the following steps:

[0034] S01. Measure the length L and width W of the cooling system, the length L of the GOR frame 1 and width W 1 and the length L of the anti-collision beam 2 and width W 2 , where measuring the length L and width W of the cooling system also includes measuring the length L of the intercooler in the cooling system 3 and width W 3 , the length of the radiator L 4 and width W 4 and the length L of the cooling fan 5 and width W 5 ;

[0035] S02. According to the set torque, assemble the cooling system, GOR frame and anti-collision beam according to the state of the whole vehicle to obtain the front-end module;

[0036] S03. Install and debug the vibration exciter. According to the measured length and width of the cooling system, GOR frame and anti-collision beam and their coordinates, model them in Simcen...

Embodiment 2

[0045] see Figure 3-4, Embodiment 2 of the present invention provides a cooling system modal frequency test tool, which is used to fix the front-end module of the vehicle. The front-end module 10 includes a GOR frame 11, a cooling system 12 and an anti-collision beam 13. Around the system 12, it is used to realize the modal frequency identification method of the cooling system. The test tooling includes a tooling bracket 20 and a fixed block 40. At least two sets of tooling brackets 20 are provided, which are distributed on both sides of the front-end module 10. The GOR frame 11 is fixed on the Between the tooling brackets 20, the cooling system 12 is fixed in the GOR frame 11, the anti-collision beam 13 is fixed on one side of the tooling bracket 20 to simulate the assembly state of the front-end module 10, and the fixing block 40 is used to fix the vibration exciter 30 , the vibrator 30 is connected to the cooling system 12 .

[0046] The intercooler, radiator, cooling fan...

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Abstract

The invention discloses a cooling system modal frequency identification method and a cooling system modal frequency test tool. The method comprises the steps of measuring the length and width of a cooling system, the length and width of a GOR frame, and the length and width of an anti-collision beam, assembling the cooling system, the GOR frame and the anti-collision beam according to a set torque and a whole vehicle state to obtain a front-end module, pre-installing the front-end module on the cooling system modal frequency test tool for assembly so as to simulate a whole vehicle assembly state of the front-end module, installing and debugging a vibration exciter, modeling the cooling system, the GOR frame and the anti-collision beam in Simcenter Testlab software according to the measured lengths, widths and coordinates of the cooling system, the GOR frame and the anti-collision beam, arranging an acceleration sensor according to a modeling position, using the vibration exciter for carrying out modal testing, and employing PolyMax Modal Analysis for carrying out modal recognition. According to the cooling system modal frequency identification method and the cooling system modal frequency test tool, the module frequency of the cooling system can be rapidly and effectively identified, and a basis is provided for reasonable frequency avoiding of a cooling system mode and engine idling excitation.

Description

technical field [0001] The invention relates to the technical field of automobile vibration and noise control, in particular to a cooling system modal frequency identification method and testing tooling. Background technique [0002] With the rapid development of my country's automobile industry, modular design has become a key indicator to measure the design capabilities of major OEMs. The modular design enables higher system integration while reducing production and assembly costs. The continuous increase in vehicle power and comfort configuration has also brought about the layout and installation of the cooling system. The modularization of the cooling system has greatly optimized the layout and installation problems, and it also contributes to the lightweight of the car. The modal identification of the cooling system has caused some interference, and the frequency avoidance between the modal frequency of the cooling system and the modal frequency of the engine has becom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007
CPCG01M17/007
Inventor 罗鑫丁文敏钟秤平陈清爽林胜罗轶超
Owner JIANGLING MOTORS