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Technical Briefs

Finite Element Model Updating of Machine-Tool Spindle Systems

[+] Author and Article Information
Hongrui Cao

Associate Professor e-mail: chr@mail.xjtu.edu.cn

Bing Li

Associate Professor
e-mail: bli@mail.xjtu.edu.cn

Zhengjia He

Professor
e-mail: hzj@mail.xjtu.edu.cn
State Key Laboratory for Manufacturing Systems Engineering,
Xi'an Jiaotong University
Xi'an 710049, P.R. China

1Corresponding author.

Contributed by the Design Engineering Division of ASME for publication in the Journal of Vibration and Acoustics. Manuscript received November 24, 2011; final manuscript received September 12, 2012; published online February 25, 2013. Assoc. Editor: Weidong Zhu.

J. Vib. Acoust 135(2), 024503 (Feb 25, 2013) (4 pages) Paper No: VIB-11-1282; doi: 10.1115/1.4023045 History: Received November 24, 2011; Revised September 12, 2012

The unknown joint dynamics are the main obstacle that limits the accuracy of the finite element (FE) model of a machine-tool spindle assembly. In this paper, an FE model updating method is proposed to assist industrial engineers in achieving a reliable model that can accurately represent the dynamic characteristics of machine-tool spindle systems. In the proposed FE model updating procedure, the iterative algorithm based on frequency response functions (FRFs) is applied. The joint stiffness parameters are identified through the iteration process, while the FE model is updated simultaneously. The proposed method was applied to update an existing coupled model of a machine-tool spindle system. The experimental results show that the identified joint stiffness parameters are acceptable and the dynamic behavior of the spindle mounted in the machine tool column is predicted reliably.

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References

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Figures

Grahic Jump Location
Fig. 1

The proposed FE model updating scheme

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Fig. 2

(a) The spindle mounted on the machine tool. (b) The model of the spindle-head and the spindle.

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Fig. 3

The convergence history of FRF residuals for the machine-tool spindle system

Grahic Jump Location
Fig. 4

The comparison of FRFs at the tool tip of the machine-tool spindle system, (a) X direction and (b) Y direction

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