Dynamic characteristic testing device and method for vehicle transmission system dynamic vibration absorber

Abstract

The invention discloses a dynamic characteristic testing device and method for a vehicle transmission system dynamic vibration absorber. The testing device comprises a circular rod type or circular tube type circular mandrel for installation of the hydraulic vibration absorber. The circular mandrel is fixed to be in the horizontal state through three jaws of three-jaw chucks at the two ends in a clamping or expansion holding mode. The two three-jaw chucks are fixedly connected to vertical edges of the two supporting bases respectively. The horizontal edges of the two supporting bases are fixedly connected to a workbench through bolts. Testing is performed by means of the testing device, and the method comprises the steps of hydraulic vibration absorber installation, data collection and analysis system connection, signal calibration and testing, data processing and analysis and the like, wherein the dynamic vibration absorber is installed on the circular mandrel, and the circular mandrel is clamped and fixed through the two three-jaw chucks. The dynamic characteristic testing device has the advantages of being simple in structure, convenient to adjust and wide in application range, and the testing method has the advantages of being easy to implement, high in testing accuracy and capable of effectively shortening the vehicle development period.

Description

technical field [0001] The invention relates to the field of vehicle NVH technology control, in particular to a dynamic characteristic testing device and testing method of a dynamic vibration absorber of a vehicle transmission system. Background technique [0002] Dynamic vibration absorption is one of the commonly used methods in the field of vehicle NVH (Noise, Vibration, and Harshness) control. The dynamic vibration absorber uses the dynamic effect of the subsystem resonance to effectively absorb the excitation response of the original main vibration system, so as to reduce the vibration response of the original system. [0003] The vehicle power transmission system is the main noise source and excitation source of the car, and its bending vibration problem is the key and difficult problem in the development of vehicle performance. The bending resonance of the automobile transmission system has an important impact on the vibration of the vehicle and the roaring noise ins...

AI Technical Summary

Problems solved by technology

However, the above test methods mainly have the following problems: (1) the existing fixture has limited restraint ability, and cannot realize the stable fixation of the transmission shaft; (2) the existing fixture has poor operational flexibility, and when the shaft diameter changes, a new fixture needs to be designed for replacement; (3) In the state of the whole vehicle, the restraint mode of the transmission shaft is limited, and it is difficult to separate the dynamic response characteristics of the transmission shaft body from the test results, and the accuracy is difficult to guarantee; (4) The verification effect of the vehicle road test cannot be guaranteed, and it involves a long period and requires manpower. , Material investment is large

Therefore, the test results under the above conditions are difficult to ensure that the developed products meet the design requirements at the initial stage of design, and the accuracy is poor; engineers then carry out a series of work such as repeated design-verification-processing to ensure the development requirements, which affects to a certain extent The design and development cycle and cost of dynamic shock absorber products and the entire automotive product

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