Title: Numerical simulation-based ride comfort analysis of the high-speed train using multibody dynamics

Authors: Sumeet Padhi; Yamika Patel; Harsh Kumar; Vikas Rastogi

Addresses: Department of Mechanical Engineering, Delhi Technological University, Shahbad Daulatpur, Main Bawana Road, Delhi – 110042, India ' Department of Mechanical Engineering, Delhi Technological University, Shahbad Daulatpur, Main Bawana Road, Delhi – 110042, India ' Department of Mechanical Engineering, Delhi Technological University, Shahbad Daulatpur, Main Bawana Road, Delhi – 110042, India ' Deceased; formerly of: Department of Mechanical Engineering, Delhi Technological University, Shahbad Daulatpur, Main Bawana Road, Delhi – 110042, India

Abstract: High-speed railway is emerging as one of India's vital infrastructure projects. The level of operational safety and comfort are crucial aspects for a passenger. Random track imperfections may lead high-speed trains (HSRV) to react unacceptably, jeopardising operational safety and comfort. This paper attempts to numerically solve the ride comfort problem through the concepts of multibody dynamics under power spectral density (PSD)-based track irregularity, modelled, and simulated in SIMPACK software. A 50 degree of freedom HSRV model has been developed in SIMPACK. The full car model consists of one LBH coach, two FIAT bogies and four wheelsets. Measured track irregularity data of high-speed China Railway Comprehension Inspection Train (CRCIT) has been used. Modelling of nonlinear primary and secondary dampers is also incorporated to make HSRV more practical. This work includes acceleration response in the time and frequency domains. Additionally, an investigation on the effect of velocity and suspension parameters on the ride index is carried out.

Keywords: numerical simulation; ride comfort; track irregularity; PSD; power spectral density; vibration; multi-body; SIMPACK.

DOI: 10.1504/IJHVS.2022.128923

International Journal of Heavy Vehicle Systems, 2022 Vol.29 No.5, pp.441 - 462

Received: 09 Mar 2022
Accepted: 11 Jul 2022
Published online: 10 Feb 2023 *

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