Method for testing and analyzing frictional noise and test device for method

Abstract

The invention discloses a method for testing and analyzing frictional noise and a test device for the method. The method comprises that: a lower fixture clamping a lower friction part is fixed onto a reciprocating device; an upper fixture clamping an upper friction part penetrates through a horizontal support to contact with the bottom of a strain force sensor; a three-dimensional acceleration sensor is mounted on the upper fixture; two ends of the horizontal support are fixed onto support bases by piezoelectric force sensors; and the strain force sensor is fixed to the bottom of a two-dimensional moving table. A sensing end of an acoustic sensor is close to a contact interface of the upper friction part and the lower friction part, and the two-dimensional moving table is controlled so that the upper friction part and the lower friction part are controlled to do reciprocating friction motion, and the three sensors accurately, synchronously and dynamically acquire the frictional noise, vibration acceleration and frictional force and analyze the frictional noise, the vibration acceleration and the frictional force in real time. Therefore, mutual relation and influencing law of the frictional noise, the interface and characteristics of a system are accurately analyzed, a mechanism of production of the frictional noise is disclosed, and a more accurate and reliable test basis is provided for realizing noise-reduction design for mechanical equipment, improving performance of the mechanical equipment and prolonging the service life of the mechanical equipment.

Description

technical field [0001] The invention belongs to the technical field of friction noise in mechanical engineering. Background technique [0002] Air, water and noise pollution are known as the three major pollution sources that industrial civilization endangers the environment. With the rapid development of modern industrial technology, while bringing convenience and high benefits to the society, the radiated industrial and traffic noise has also brought serious harm and loss, and a large number of frictional contact parts in industrial and traffic machinery equipment produce The friction noise problem is the most serious. Friction noise refers to a sound with irregular changes in frequency and sound pressure level due to friction, usually high-frequency noise above 1kH. It not only does great damage to human hearing and the surrounding environment, but also seriously affects and hinders many friction systems, such as braking systems, wheel-rail systems for rail transportati...

AI Technical Summary

Problems solved by technology

However, at present, there are few studies on friction noise from the perspective of tribology test, which is mainly due to the many factors involved in the friction noise test, the difficulty of manual control reproduction or simulation, and the high requirements for test repeatability and test accuracy.

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