Modal Analysis of Machine Tool Structures Based on Experimental Data

Eman, K. F.; Kim, Kwang-joon

doi:10.1115/1.3185900

Cited by 17 publications

(10 citation statements)

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“…Therefore, the precision of operating parameters is not high when using this method. (ii) Experimental modal analysis (EMA) methods are usually applied to the static state and obtain the static modal parameters, which is not suitable for acquiring parameters in the operating state [8]. (iii) Operational modal analysis (OMA) is used under this condition [9].…”

Section: Introductionmentioning

confidence: 99%

Research on dynamics of sorting arms with high frequency reciprocating motion

Jiang¹,

Li²,

He³

et al. 2018

J. vibroeng.

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The characters of high frequency reciprocating equipment are quick starting and stopping, short range, high frequency and multi-freedom reciprocating motion. The inertia introduced by the high frequency reciprocating motion of a LED chip sorter has complicated effects on the positional accuracy. It is necessary to obtain dynamics of the sorting arm to suppress the vibration of the high frequency operation. The positioning precision and positioning time are affected by the natural vibration of the sorting arm by analyzing the displacement response. The paper verifies that the inherent vibration of the sorting arm has a crucial effect on its positioning precision and positioning time. Under static condition, due to the additional mass of the accelerometers, the research results show that there is no obvious difference in the experimental modal analysis (EMA) based on multi-type sensors. The modal parameters identified by accelerometers and strain gauges are very close. The modal parameters are obtained through the modal analysis method, which combines the strain modal analysis and operational modal analysis (OMA), under high frequency reciprocating motion. The paper verifies that the modal parameters of lightweight structure are very different in the static and operation. The key points of each mode are found by analyzing the modal amplitudes at different speeds which provide the guiding principle and basis for the dynamic optimization of the sorting arm mechanism.

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Section: Introductionmentioning

confidence: 99%

Research on dynamics of sorting arms with high frequency reciprocating motion

Jiang¹,

Li²,

He³

et al. 2018

J. vibroeng.

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“…Particularly, the dynamic stiffness and damping between the joints are predominant factors, since they are weaker than those of structures themselves [3]. Both the experiment and FEA can be used to obtain the modal parameters in some way [4][5][6]. Actually, nonlinear characteristics exist in the common structure, which have aroused many researchers' interests to define and address the issues [7].…”

Section: Introductionmentioning

confidence: 99%

Modal and Harmonic Reponse Analysis and Evaluation of Machine Tools

Zhang

et al. 2010

2010 International Conference on Digital Manufacturing &Amp; Automation

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One approach using modal analysis and harmonic response to analyze the characteristics of machine tools is proposed in this paper. Dynamic theory and modeling method of MDOF system are introduced. Modal experiment is carried out to obtain modal frequency, damping and shape. Based on these parameters, a virtual dynamic model is established to match the actual one. Meanwhile, simulation and modal analysis have been done using FEA to obtain the accurate dynamic characteristics. Moreover, studies of harmonic response are carried out to get the explicit characteristics of each part in the model. Additionally, there are some suggestions regarding to improvement in the future.

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“…As input, to be correctly performed, a harmonic analysis needs harmonic loads (such as forces, pressures or imposed displacements) of known magnitude and frequency (Eman and Kim 1983). Beyond the peculiarity of these multiple loads, they have to be applied at a specific and constant frequency.…”

Section: Analysis Of Vibrations In Briefmentioning

confidence: 99%

Harmonic Analysis and Dynamical Response Optimization in Ceramic Tile Finishing

Pavlović¹,

Minak²,

Lucisano³

et al. 2017

JSSCM

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This paper investigates the dynamic response of a large production machine used for surface finishing of oversized ceramic tiles through tool machining. In particular, the study aims at improving this phase of the industrial process, as well as the overall quality of the final products. As the finite element method has become an essential solution technique in many areas of engineering related to dynamic processes, the FEM is utilized in the optimization of machine basement for ceramic tile finishing. Two different basements of cutting machine have been considered as alternative design solutions. The responses in frequency and phase have been observed and compared. Stresses and strains have been also considered for comparison. This numerical computation permitted to select a convenient design option for the basement.

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Modal Analysis of Machine Tool Structures Based on Experimental Data

Cited by 17 publications

References 0 publications

Research on dynamics of sorting arms with high frequency reciprocating motion

Research on dynamics of sorting arms with high frequency reciprocating motion

Modal and Harmonic Reponse Analysis and Evaluation of Machine Tools

Harmonic Analysis and Dynamical Response Optimization in Ceramic Tile Finishing

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