Estimation and Adjustment of Interface Stiffnesses for Machine-Tool
This study adopts a practical approach to establish the estimation and adjustment methods of the interface stiffness for the machine-tool through the finite element analysis (FEA). First, numerical and experimental modal analysis (FMA and EMA) for each single subsystem of the machine-tool structure...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/23/12384 |
| _version_ | 1797463545164595200 |
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| author | Shen-Yung Lin Guan-Chen Li |
| author_facet | Shen-Yung Lin Guan-Chen Li |
| author_sort | Shen-Yung Lin |
| collection | DOAJ |
| description | This study adopts a practical approach to establish the estimation and adjustment methods of the interface stiffness for the machine-tool through the finite element analysis (FEA). First, numerical and experimental modal analysis (FMA and EMA) for each single subsystem of the machine-tool structure are performed. Then, the parameters obtained from EMA are used as the objective criterion function, and the FMA is conducted iteratively to solve the material Young’s modulus and Poisson’s ratio for each single subsystem structure, in which the geometrical model is simplified and FE mesh convergence is performed to ensure the quality and efficiency of the numerical analysis. Next, by considering that the machine-tool is assembled by subsystem stacking and that loading on each contact surface is deduced, the FE method is used to calculate the deformation of each contact interface after the single subsystem is stacked successively. The initial value of the interface stiffness estimated by the deformation formula in the mechanics of material is utilized as the initial condition for the iterative calculation in FMA. The changes of the modal parameters are observed in the analysis and the interface, which have a significant impact on the natural frequency variations of the whole machine-tool is selected as the main adjustment object. Then, the adjustment method proposed in this study is applied repeatedly to modify this interface stiffness. The results show that footing interface stiffnesses play the most important role that intensively affects the numerical analysis results of modal parameter. After the repeated adjustments of the interface stiffnesses of the footing, the error of the natural frequency of the whole machine-tool is less than 5%, which is calculated from the comparison between EMA and FMA results. It indicates that the proposed adjustment method in this study for footing interface stiffness determination has a valuable reference in practical use. |
| first_indexed | 2024-03-09T17:52:15Z |
| format | Article |
| id | doaj.art-5bea13de82494394896afebc5e79abfd |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T17:52:15Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-5bea13de82494394896afebc5e79abfd2023-11-24T10:35:37ZengMDPI AGApplied Sciences2076-34172022-12-0112231238410.3390/app122312384Estimation and Adjustment of Interface Stiffnesses for Machine-ToolShen-Yung Lin0Guan-Chen Li1Department of Mechanical and Computer-Aided Engineering, National Formosa University, No. 64, Wunhua Rd., Huwei Township, Yunlin 63201, TaiwanDepartment of Mechanical and Computer-Aided Engineering, National Formosa University, No. 64, Wunhua Rd., Huwei Township, Yunlin 63201, TaiwanThis study adopts a practical approach to establish the estimation and adjustment methods of the interface stiffness for the machine-tool through the finite element analysis (FEA). First, numerical and experimental modal analysis (FMA and EMA) for each single subsystem of the machine-tool structure are performed. Then, the parameters obtained from EMA are used as the objective criterion function, and the FMA is conducted iteratively to solve the material Young’s modulus and Poisson’s ratio for each single subsystem structure, in which the geometrical model is simplified and FE mesh convergence is performed to ensure the quality and efficiency of the numerical analysis. Next, by considering that the machine-tool is assembled by subsystem stacking and that loading on each contact surface is deduced, the FE method is used to calculate the deformation of each contact interface after the single subsystem is stacked successively. The initial value of the interface stiffness estimated by the deformation formula in the mechanics of material is utilized as the initial condition for the iterative calculation in FMA. The changes of the modal parameters are observed in the analysis and the interface, which have a significant impact on the natural frequency variations of the whole machine-tool is selected as the main adjustment object. Then, the adjustment method proposed in this study is applied repeatedly to modify this interface stiffness. The results show that footing interface stiffnesses play the most important role that intensively affects the numerical analysis results of modal parameter. After the repeated adjustments of the interface stiffnesses of the footing, the error of the natural frequency of the whole machine-tool is less than 5%, which is calculated from the comparison between EMA and FMA results. It indicates that the proposed adjustment method in this study for footing interface stiffness determination has a valuable reference in practical use.https://www.mdpi.com/2076-3417/12/23/12384interface stiffnessestimation methodadjustment methodmodal analysisfooting |
| spellingShingle | Shen-Yung Lin Guan-Chen Li Estimation and Adjustment of Interface Stiffnesses for Machine-Tool Applied Sciences interface stiffness estimation method adjustment method modal analysis footing |
| title | Estimation and Adjustment of Interface Stiffnesses for Machine-Tool |
| title_full | Estimation and Adjustment of Interface Stiffnesses for Machine-Tool |
| title_fullStr | Estimation and Adjustment of Interface Stiffnesses for Machine-Tool |
| title_full_unstemmed | Estimation and Adjustment of Interface Stiffnesses for Machine-Tool |
| title_short | Estimation and Adjustment of Interface Stiffnesses for Machine-Tool |
| title_sort | estimation and adjustment of interface stiffnesses for machine tool |
| topic | interface stiffness estimation method adjustment method modal analysis footing |
| url | https://www.mdpi.com/2076-3417/12/23/12384 |
| work_keys_str_mv | AT shenyunglin estimationandadjustmentofinterfacestiffnessesformachinetool AT guanchenli estimationandadjustmentofinterfacestiffnessesformachinetool |