Transient Analysis of a Flexible Pin-On-Disc System and Its Application to The Research Into Time-varying Squeal

[+] Author and Article Information
Lijun Zhang

School of Automotive Studies, Tongji University, Shanghai 201804, China

Jun Wu

School of Automotive Studies, Tongji University, Shanghai 201804, China

Dejian Meng

School of Automotive Studies, Tongji University, Shanghai 201804, China

1Corresponding author.

ASME doi:10.1115/1.4037468 History: Received November 09, 2016; Revised June 29, 2017


In this paper, a flexible pin-on-disc system is used to simulate how squeal noise can be generated in frictional contact. As the research object, the modelling process and transient simulation method of the flexible pin-on-disc system is introduced. By means of numerical simulation, the time-varying frictional squeal reappears by introducing rotation-generating periodic frictional coefficient. Afterwards, the features of time-varying squeal is studied including time-domain features, frequency-domain features, transient deformation features of the disc and the pin on the occurrence of squeal as well as energy features. Finally, the conception and mathematical expression of modal contribution factor is defined, the transient modal contribution factor features of every mode are studied to make clear the function of every mode. The relationship between mode contribution factors and the vibration is revealed. It reveals that modal contribution factors between squeal and not are quite different from each other; On no occurrence of squeal, the modal contribution factors of sine and cosine modes of the disc fluctuate in the way similar to harmonic wave, the phase difference between the contribution factors of sine and cosine mode with the same nodal circle and the same nodal diameter is 90?; During squeal, the coupling mode may play the most important role but not all the time. At any time, the low-frequency modes play the leading role.

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