Rigid body mode testing method for powertrain mounting system under loading condition

A powertrain and testing method technology, which is applied in vehicle testing, machine/structural component testing, vehicle suspension/shock absorbing mechanism testing, etc., can solve the problems of lack of effective testing methods, powertrain damage, and vibration exciter operation. Space limitations and other issues, to achieve the effect of saving test costs, practical test methods, and test time

Active Publication Date: 2010-12-08
常熟市知识产权运营中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While the exciter or hammer provides a point force, excessive force may cause damage to the powertrain
In addition, the arrangement of the exciter or the operating space of the hammer is also strictly limited b

Method used

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  • Rigid body mode testing method for powertrain mounting system under loading condition
  • Rigid body mode testing method for powertrain mounting system under loading condition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: as figure 1 As shown, a rigid body modal test method of the powertrain suspension system under the loading condition, the equipment part includes a powertrain suspension device 1 for testing, a vibration sensor 3 and a data acquisition device 2, and also includes A weight 5 and a rope 4 are used for auxiliary testing. The mass of the weight 5 is two-fifths of the total weight of the powertrain suspension device 1 of the vehicle to be tested. Two vibration sensors 3 are arranged on the powertrain suspension device 1 , and the above vibration sensors 3 are connected to the data acquisition device 2 .

[0026] Before the preparation of the rigid body mode test method, the whole vehicle is lifted to a certain height through the lift, and then the following test method steps are implemented:

[0027] Step S1: hanging the heavy object 5 on one side of the powertrain suspension device 1 through the rope 4;

[0028] Step S2: Re-initialize the modal test and anal...

Embodiment 2

[0032] Embodiment 2: Before the preparation of the rigid body mode test method, the four wheels of the whole vehicle are emptied and placed on the maintenance platform with a ditch in the middle. All the other are with embodiment 1.

Embodiment 3

[0033] Embodiment 3: In steps S1 and S4, the force surface between the rope 4 and the powertrain suspension device 1 is increased by adding a sheath on the rope 4, so as to avoid excessive local force and prevent powertrain causes Damage caused by excessive local force. All the other are with embodiment 2.

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Abstract

The invention discloses a rigid body mode testing method for a powertrain mounting system under the loading condition. In the method, a heavy object is hung on a powertrain mounting device under the loading condition; and a rope for hanging the heavy object is cut to suddenly release the force acted on the powertrain mounting device so as to excite the free vibration of the powertrain mounting device and immediately trigger a data acquisition unit to record and store the data on a vibration transducer at the moment. A rigid body mode of the mounting system is tested by the method and the obtained each-order natural frequency and decoupling rate are the actual and real natural frequency and decoupling rate of a tested vehicle, so that the method tests the performance of the vehicle most directly, really and reliably. The testing method can be performed on any entire vehicle, only a proper number of heavy objects is needed, and the design and processing of a test bench are avoided, so that the testing cost is basically avoided. Obviously, the testing time and the testing cost are greatly saved.

Description

technical field [0001] The invention relates to the field of automobile loading performance testing, in particular to a rigid body mode testing method of a power assembly suspension system under loading conditions. Background technique [0002] The main function of the powertrain mount system is to achieve two-way vibration isolation between the powertrain and the body. And its vibration isolation performance mainly depends on the vibration decoupling design and frequency shifting design of the suspension system (that is, the reasonable allocation of natural frequencies). [0003] At present, these two are usually designed and verified through theoretical and simulation calculations. The actual performance under actual loading conditions and the calculation results are affected by factors such as approximation errors, suspension component manufacturing errors, and installation errors. Often there are considerable differences. [0004] The mode shape of the system can be ob...

Claims

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Application Information

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IPC IPC(8): G01M17/04G01M17/007G01M7/02
Inventor 单树军孔令彬王海林刘强马芳武李书福杨健赵福全
Owner 常熟市知识产权运营中心有限公司
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