Citation

Shokouhfar S, Rakheja S, Gindy ME. Int. J. Veh. Syst. Model. Test. 2016; 11(2): 116-141.

Copyright

(Copyright © 2016, Inderscience Publishers)

DOI

10.1504/IJVSMT.2016.077928

PMID

unavailable

Abstract

Modal analysis of a rolling truck tyre under inflation pressure and vertical deflection is conducted to determine its natural frequencies and mode shapes. A 3-D finite element model of a radial-ply truck tyre is used considering its multi-layered composite structure. The nonlinear effects of the inflation pressure, vertical load and rolling speed are incorporated in the analysis through an explicit dynamic simulation to determine the stress state throughout the tyre at instants when the modal characteristics are desired. The eigenvalues are subsequently extracted at three key moments when the tyre reaches the steady state after application of the inflation pressure, vertical deflection and rolling speed. For a deflected tyre, the conjugate mode frequencies, being identical for an inflated tyre, diverged to two different frequencies with one being lower and the other higher than the corresponding frequency of the tyre under inflation alone. The influences of the inflation pressure, vertical load and rolling speed on tyre natural frequencies are obtained through the development of a computationally efficient algorithm to automate the tyre model reformulations for parametric studies.


Keywords: rolling tyre models; natural frequencies; complex mode shapes; modal analysis; intermittent eigenvalue extraction; finite element method; FEM; LS-DYNA; 3D modelling; tyre pressure; tyre inflation pressure; vertical deflection; truck tyres; multi-layered tyre structure; tyre modelling; vertical load; rolling speed; radial-ply tyres; radial tyres; tyre model reformulation.

Language: en