Structural Design Optimization and Prestress Simulation of the Laminate-Containment Launcher
The laminate-containment launcher is a high-efficiency electromagnetic railgun launcher (EMRL), which uses a laminate structure to reduce eddy current loss. However, the research on the design optimization of the laminate-containment launcher with prestress and mass as the goal is rarely mentioned....
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| Published in: | IEEE transactions on plasma science Vol. 49; no. 9; pp. 3003 - 3008 |
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| Main Authors: | , |
| Format: | Journal Article |
| Language: | English |
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New York
IEEE
01.09.2021
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
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| ISSN: | 0093-3813, 1939-9375 |
| Online Access: | Get full text |
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| Abstract | The laminate-containment launcher is a high-efficiency electromagnetic railgun launcher (EMRL), which uses a laminate structure to reduce eddy current loss. However, the research on the design optimization of the laminate-containment launcher with prestress and mass as the goal is rarely mentioned. In this article, some key parameters of the laminate-containment launcher-the magnitude of interference <inline-formula> <tex-math notation="LaTeX">s </tex-math></inline-formula>, the axial thickness of the steel laminate <inline-formula> <tex-math notation="LaTeX">t_{s} </tex-math></inline-formula> and insulation laminate <inline-formula> <tex-math notation="LaTeX">t_{i} </tex-math></inline-formula>, the thickness of inner glass fiber <inline-formula> <tex-math notation="LaTeX">r_{g} </tex-math></inline-formula>, and the radial thickness of the laminate <inline-formula> <tex-math notation="LaTeX">r_{l} </tex-math></inline-formula>-are studied. On this basis, the influence of the five parameters on the hoop stress of the rail is fitted as a function by using the multiple nonlinear regression method. Then, the maximum hoop stress <inline-formula> <tex-math notation="LaTeX">f_{\mathrm {1max}} </tex-math></inline-formula> and the maximum hoop stress difference <inline-formula> <tex-math notation="LaTeX">f_{\mathrm {2max}} </tex-math></inline-formula> of the rail are calculated by using a nonlinear programming algorithm. Finally, the maximum hoop stress <inline-formula> <tex-math notation="LaTeX">f_{\mathrm {1max}} </tex-math></inline-formula>, the maximum hoop stress difference <inline-formula> <tex-math notation="LaTeX">f_{\mathrm {2max}} </tex-math></inline-formula>, and the maximum mass <inline-formula> <tex-math notation="LaTeX">f_{\mathrm {3max}} </tex-math></inline-formula> are taken as the reference values, and the optimal solution of the multiobjective function is obtained by using the weighted nonlinear programming algorithm. The results can be described as follows: the hoop stress of the rail changes linearly with the increase of the magnitude of interference, while the hoop stress changes approximately quadratic with the change of other parameters. Through the optimization of nonlinear programming algorithm with weighted form, the optimal design under different weighted values is obtained, which has a small error compared with the calculation results of ANSYS. The important characteristic that the hoop stress of the laminate-containment launcher presents wavy variation along the axial direction is obtained by numerical simulation. These results can provide theoretical guidance for the structural design of the laminate-containment launcher. |
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| AbstractList | The laminate-containment launcher is a high-efficiency electromagnetic railgun launcher (EMRL), which uses a laminate structure to reduce eddy current loss. However, the research on the design optimization of the laminate-containment launcher with prestress and mass as the goal is rarely mentioned. In this article, some key parameters of the laminate-containment launcher—the magnitude of interference [Formula Omitted], the axial thickness of the steel laminate [Formula Omitted] and insulation laminate [Formula Omitted], the thickness of inner glass fiber [Formula Omitted], and the radial thickness of the laminate [Formula Omitted]—are studied. On this basis, the influence of the five parameters on the hoop stress of the rail is fitted as a function by using the multiple nonlinear regression method. Then, the maximum hoop stress [Formula Omitted] and the maximum hoop stress difference [Formula Omitted] of the rail are calculated by using a nonlinear programming algorithm. Finally, the maximum hoop stress [Formula Omitted], the maximum hoop stress difference [Formula Omitted], and the maximum mass [Formula Omitted] are taken as the reference values, and the optimal solution of the multiobjective function is obtained by using the weighted nonlinear programming algorithm. The results can be described as follows: the hoop stress of the rail changes linearly with the increase of the magnitude of interference, while the hoop stress changes approximately quadratic with the change of other parameters. Through the optimization of nonlinear programming algorithm with weighted form, the optimal design under different weighted values is obtained, which has a small error compared with the calculation results of ANSYS. The important characteristic that the hoop stress of the laminate-containment launcher presents wavy variation along the axial direction is obtained by numerical simulation. These results can provide theoretical guidance for the structural design of the laminate-containment launcher. The laminate-containment launcher is a high-efficiency electromagnetic railgun launcher (EMRL), which uses a laminate structure to reduce eddy current loss. However, the research on the design optimization of the laminate-containment launcher with prestress and mass as the goal is rarely mentioned. In this article, some key parameters of the laminate-containment launcher-the magnitude of interference <inline-formula> <tex-math notation="LaTeX">s </tex-math></inline-formula>, the axial thickness of the steel laminate <inline-formula> <tex-math notation="LaTeX">t_{s} </tex-math></inline-formula> and insulation laminate <inline-formula> <tex-math notation="LaTeX">t_{i} </tex-math></inline-formula>, the thickness of inner glass fiber <inline-formula> <tex-math notation="LaTeX">r_{g} </tex-math></inline-formula>, and the radial thickness of the laminate <inline-formula> <tex-math notation="LaTeX">r_{l} </tex-math></inline-formula>-are studied. On this basis, the influence of the five parameters on the hoop stress of the rail is fitted as a function by using the multiple nonlinear regression method. Then, the maximum hoop stress <inline-formula> <tex-math notation="LaTeX">f_{\mathrm {1max}} </tex-math></inline-formula> and the maximum hoop stress difference <inline-formula> <tex-math notation="LaTeX">f_{\mathrm {2max}} </tex-math></inline-formula> of the rail are calculated by using a nonlinear programming algorithm. Finally, the maximum hoop stress <inline-formula> <tex-math notation="LaTeX">f_{\mathrm {1max}} </tex-math></inline-formula>, the maximum hoop stress difference <inline-formula> <tex-math notation="LaTeX">f_{\mathrm {2max}} </tex-math></inline-formula>, and the maximum mass <inline-formula> <tex-math notation="LaTeX">f_{\mathrm {3max}} </tex-math></inline-formula> are taken as the reference values, and the optimal solution of the multiobjective function is obtained by using the weighted nonlinear programming algorithm. The results can be described as follows: the hoop stress of the rail changes linearly with the increase of the magnitude of interference, while the hoop stress changes approximately quadratic with the change of other parameters. Through the optimization of nonlinear programming algorithm with weighted form, the optimal design under different weighted values is obtained, which has a small error compared with the calculation results of ANSYS. The important characteristic that the hoop stress of the laminate-containment launcher presents wavy variation along the axial direction is obtained by numerical simulation. These results can provide theoretical guidance for the structural design of the laminate-containment launcher. |
| Author | Wang, Jun Li, Baoming |
| Author_xml | – sequence: 1 givenname: Jun orcidid: 0000-0002-5022-8033 surname: Wang fullname: Wang, Jun email: 1323722199@qq.com organization: National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing, China – sequence: 2 givenname: Baoming surname: Li fullname: Li, Baoming email: baomingli@njust.edu.cn organization: National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing, China |
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| SubjectTerms | Algorithms Axial stress Computer simulation Containment Current loss Design Design optimization Eddy current testing Eddy currents Electromagnetic railgun launcher (EMRL) Glass Glass fibers Hoop stress Hoops Insulation Interference laminate-containment Laminates Launchers Multiple objective analysis Nonlinear programming nonlinear programming algorithm nonlinear regression fitting Optimization Parameters prestress Prestressing Railguns Rails Steel Structural design Structural engineering Thickness |
| Title | Structural Design Optimization and Prestress Simulation of the Laminate-Containment Launcher |
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