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Dynamic optimization of constrained layer damping structure for the headstock of machine tools with modal strain energy method
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Xu, Yakai, Gao, Weiguo, Yu, Yuhan, Zhang, Dawei, Zhao, Xiangsong, Tian, Yanling and Cun, Huaying (2017) Dynamic optimization of constrained layer damping structure for the headstock of machine tools with modal strain energy method. Shock and Vibration, 2017 . 2736545. doi:10.1155/2017/2736545 ISSN 1070-9622.
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Official URL: http://dx.doi.org/10.1155/2017/2736545
Abstract
Dynamic stiffness and damping of the headstock, which is a critical component of precision horizontal machining center, are two main factors that influence machining accuracy and surface finish quality. Constrained Layer Damping (CLD) structure is proved to be effective in raising damping capacity for the thin plate and shell structures. In this paper, one kind of high damping material is utilized on the headstock to improve damping capacity. The dynamic characteristic of the hybrid headstock is investigated analytically and experimentally. The results demonstrate that the resonant response amplitudes of the headstock with damping material can decrease significantly compared to original cast structure. To obtain the optimal configuration of damping material, a topology optimization method based on the Evolutionary Structural Optimization (ESO) is implemented. Modal Strain Energy (MSE) method is employed to analyze the damping and to derive the sensitivity of the modal loss factor. The optimization results indicate that the added weight of damping material decreases by 50%; meanwhile the first two orders of modal loss factor decrease by less than 23.5% compared to the original structure.
| Item Type: | Journal Article | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
| Library of Congress Subject Headings (LCSH): | Structural dynamics, Structural optimization, Damping (Mechanics), Dynamics, Rigid, Strains and stresses | ||||||||
| Journal or Publication Title: | Shock and Vibration | ||||||||
| Publisher: | Hindawi Publishing Corporation | ||||||||
| ISSN: | 1070-9622 | ||||||||
| Official Date: | 2017 | ||||||||
| Dates: |
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| Volume: | 2017 | ||||||||
| Number of Pages: | 13 | ||||||||
| Article Number: | 2736545 | ||||||||
| DOI: | 10.1155/2017/2736545 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||
| Date of first compliant deposit: | 2 November 2017 | ||||||||
| Date of first compliant Open Access: | 3 November 2017 | ||||||||
| Funder: | China. Guo jia ke xue ji shu bu [Ministry of Science and Technology] (CMST) | ||||||||
| Grant number: | 2013ZX04005-013, 2014ZX04014- 011, 2015ZX04005-001, 2016ZX04004-002 |
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