TY - GEN
T1 - An explicit integration finite element method for impact noise generation at squat
AU - Yang, Z
AU - Li, Z
AU - Dollevoet, RPBJ
PY - 2015
Y1 - 2015
N2 - This paper presents a full finite element (FE) interaction model of wheel-track to study the wheel-rail impact noise caused by a squat. The wheel, the rail and some other track components are modeled with finite elements in three dimensions, where necessary and appropriate. Realistic contact geometry, including geometric irregularity (squat) in the contact surfaces is considered. The integration is performed in the time domain with an explicit central difference scheme. For convergence, the Courant time step condition is enforced, which, together with the detailed modeling of the structure and continuum of the wheel-track system, effectively guarantees that vibration frequency of 10 kHz or higher is reproduced. By making use of the calculated velocities and pressures on the vibrating surfaces, the boundary element method (BEM) based on Helmholtz equation is adopted to transform the vibrations of the track into acoustic signals.
AB - This paper presents a full finite element (FE) interaction model of wheel-track to study the wheel-rail impact noise caused by a squat. The wheel, the rail and some other track components are modeled with finite elements in three dimensions, where necessary and appropriate. Realistic contact geometry, including geometric irregularity (squat) in the contact surfaces is considered. The integration is performed in the time domain with an explicit central difference scheme. For convergence, the Courant time step condition is enforced, which, together with the detailed modeling of the structure and continuum of the wheel-track system, effectively guarantees that vibration frequency of 10 kHz or higher is reproduced. By making use of the calculated velocities and pressures on the vibrating surfaces, the boundary element method (BEM) based on Helmholtz equation is adopted to transform the vibrations of the track into acoustic signals.
KW - Conf.proc. > 3 pag
UR - http://resolver.tudelft.nl/uuid:17530165-6501-4dbd-82a0-64a12f1f5f64
UR - https://www.scopus.com/pages/publications/84921521594
U2 - 10.1007/978-3-662-44832-8_9
DO - 10.1007/978-3-662-44832-8_9
M3 - Conference contribution
SN - 978-3-662-44831-1
SP - 63
EP - 70
BT - Proceedings of the 11th international workshop on railway noise (IWRN11)
A2 - Nielsen, JCO
A2 - Anderson, D
A2 - Gautier, PE
A2 - Iida, M
A2 - Nelson, JT
A2 - Thompson, D
A2 - Tielkes, T
A2 - Towers, DA
A2 - de Vos, P
PB - Springer
CY - Dordrecht
T2 - IWRN11 - 11th international workshop on railway noise, Uddevalla, Sweden
Y2 - 9 September 2013 through 13 September 2013
ER -