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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 2    April 2001

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Inverse approach to determine piston profile from
impact stress waveform on given non-uniform rod
ZHU Ping-yu(朱萍玉), LIU De-shun(刘德顺),
PENG You-duo(彭佑多), CHEN An-hua(陈安华)

Institute of Vibration Impact and Diagnosis,
Xiangtan Polytechnic University, Xiangtan 411201, P.R.China

Abstract:An essential problem in the design of mechanical impact systems is the impact of a piston on a rod. The impact of a semi-finite cylindrical piston on a non-uniform rod was studied. Based on wave mechanics and characteristic line theory, an inverse numerical approach to determine the piston profile was proposed, by means of which the geometry of an impact piston may be determined from the given stress waveform for a given rod profile. Numerical results show that the given stress waveform may be produced by means of the alternatives of design of piston and rod. There is good agreement between the experimental results and numerical results.

 

Key words: impact; piston profile; non-uniform rod; inverse numerical approach; stress waveform

ISSN 1672-7029
CN 43-1423/U

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