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RISS 인기검색어
- 검색키워드
- 저자 : Abhilash Vishwakarma (검색결과 1 건)
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Effect of suspension parameters on dynamics of a metro coach: A parametric study
Sudhir Kumar Singh,Abhilash Vishwakarma,Sanjay R Singh,Vikranth Racherla 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.6
This work aims to analyse the effect of primary and secondary suspension parameters on the dynamics of a BEML metro coach plying on the Kolkata metro track with short straight segments, sharp curves, rapid acceleration, and deceleration. For this, instrumented field trials were conducted on the metro coach on the newly built track in Kolkata, India. During the trials, vehicle speed, coach acceleration, and primary, secondary springs compressions were recorded. A multibody dynamics model for the BEML metro coach plying on the metro track is built in commercial software Simpack. Vertical and lateral track irregularities, non-linear air spring and rail-wheel contact models are considered in modeling for accurate representation of the coach. The developed multibody dynamics model is validated using the field trials data by matching vertical and lateral ride comfort indices for the coach along with roll, pitch, and equivalent bounce motions of the coach and bogies. Effect of four suspension parameters, namely, effective area of air spring, horizontal stiffness of air spring, damping coefficient of lateral damper and horizontal stiffness of primary spring, on metro coach dynamics is studied. Vehicle output response parameters monitored include average vertical ride comfort, average lateral ride comfort, maximum derailment coefficient, average wear index, and vehicle stability. Central composite design is used to design the simulation runs. Response surface methodology is used to obtain second order polynomial models for output response variables in terms of selected suspension parameters. Significant reduction of around 8 % in average wear index was observed for 20 % reduction in horizontal stiffness of primary and secondary springs. Separately, around 7 % reduction in lateral ride comfort index was observed for 20 % reduction in lateral damping coefficient, secondary spring horizontal stiffness and 20 % increase in primary spring horizontal stiffness.
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