Transactions of Materials and Heat Treatment

Title：Finite element analysis on modal and dynamic response of unsupported mandrel on end face

Authors： Yuan Jianbo Lan Jian

Unit： Wuhan University of Technology Hubei Key Laboratory of Advanced Technology of Automotive Components

KeyWords： ring rolling ring rolling mill mandrel modal analysis transient response Fourier transform FEA

ClassificationCode：TB115；TG333.91

year,vol(issue):pagenumber：2017,42(5):152-158

Abstract：

For rolling rectangle section ring, its modal analysis about the end-face unsupported mandrel was carried out by NX Nastran, and natural frequencies and modal vibration shapes of the first six orders were obtained under the constraint condition of the mandrel. Then, the influence of each mode on the working state of the mandrel was analyzed in detail. Furthermore, the force model of the mandrel was simplified in the ring rolling process, and the changes of the mandrel node displacement and stress with time under three kinds of different rolling times were simulated and analyzed. At the same time, rolling force signals from three kinds of time domain were transformed by Fourier transform, and the influence of the frequency domain of the rolling force signals on the mandrel vibration was analyzed. The results show that the working speed of the mandrel is much lower than the first order critical speed, and it can not cause the resonance of the mandrel. The first six-order natural frequencies of the mandrel are in the range of sound wave, which is easy to cause the noise pollution. Under the same rolling force, different rolling periods have few influences on the displacement and stress response of mandrel. The frequency domain components of the rolling force signals can not cause the resonance of the mandrel.

Funds：

教育部创新团队发展计划项目（IRT13087）

袁建波（1991-），男，硕士研究生兰箭（1972-），男，博士，教授

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