Method for testing thermal-elastic coupled vibration characteristics in friction and sliding process of variable speed friction plate

Abstract

The invention belongs to the field of experimental simulation technologies, in particular to a method for testing thermal-elastic coupled vibration characteristics in a friction and sliding process of a variable speed friction plate. The method specifically comprises the steps of testing friction moment characteristics, rotational speed variation characteristics and thermosetting coupling characteristics in the friction and sliding process of a friction element, and then acquiring vibration characteristics. The method can provide theoretical support for the structural strength simulating calculation and optimization design of the friction element, obtains thermal-elastic coupled vibration characteristics of a friction pair during the combination / separation process through a special real-time data processing technology, can remove strong interference signals, can obtain the relation between the moment characteristics and rotational speed variation through accurate circular frequency vector and quadratic integral calculation, further synthesizes results of temperature field analysis and vibration vector spectral analysis, and can obtain the thermal-elastic coupled vibration characteristics. The experimental testing method provided by the invention is simple, practical, and high in precision of test results.

Description

technical field [0001] The invention belongs to the technical field of experimental simulation, and in particular relates to a method for testing the thermal-elastic coupling vibration characteristics of a friction-slip process of a variable-speed friction plate. Background technique [0002] As an important part of special vehicles, the transmission system's performance directly affects the mobility (such as braking, passing, acceleration), reliability and service life of the vehicle. The failure of the transmission system will directly cause the special vehicles to be unusable. [0003] The clutch friction pair is one of the important basic components of the transmission system. In actual engineering, when the friction pair is in power transmission, the friction plate often generates heat due to friction, which in turn causes damage such as thermal bending deformation, cracks or even fractures. In order to explore the vibration caused by thermal structural deformation of ...

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Problems solved by technology

However, if the vibration displacement of the friction pair is directly tested through the friction pair sliding process, such as symmetrically pasting several micro-displacement sensors and pre-embedded thermocouples on the surface of the 405 friction pair dual steel plate, it is not only limited by the conditions of the test equipment, such as Within the limited sensor installation measurement range, it is impossible to accurately find the position of the highest temperature point, and the micro-displacement vibration signal caused by thermoelastic deformation is much smaller than the vibration signal caused by the test bench system, such as lubricating oil spray, rotating motor interference, etc. , without special processing in other ways, the obtained vibration signal cannot accurately reflect the thermal-elastic coupling vibration characteristics of the friction pair friction-slip process caused by thermal-elastic deformation

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