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Finite Element Analysis and Experimental Validation of Transfer Function of Rotating Shaft System with both an Open Crack and Anisotropic Support Stiffness

[+] Author and Article Information
Qiang YAO

Department of Mechanical Systems Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
yq3010201207@gmail.com

Tsuyoshi Inoue

ASME Member, Department of Mechanical Systems Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
inoue.tsuyoshi@nagoya-u.jp

Shota Yabui

Department of Mechanical Systems Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
yabui@nuem.nagoya-u.ac.jp

1Corresponding author.

ASME doi:10.1115/1.4041078 History: Received April 15, 2018; Revised July 25, 2018

Abstract

In this paper, transfer function of rotating shaft system for detecting transverse open crack is developed. Rotating shaft system is modeled using one dimensional finite element method (1D-FEM), and quantitative analysis is performed. Open crack is modeled as weak asymmetry rotating with shaft's rotation. It is known that, when both open crack and support stiffness anisotropy coexist, various frequency components of shaft's vibration are generated through their successive interaction. This paper evaluates the order of these components, and concludes that first five main components are enough to investigate interaction of open crack and support stiffness anisotropy. Then, five sets of transfer functions for these components are derived. The validity of this set of transfer functions is confirmed by numerical simulation. Moreover, excitation experiment utilizing active magnetic bearing (AMB) is performed, and the validity of derived transfer function was verified experimentally.

Copyright (c) 2018 by ASME
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