Design and Performance Evaluation of an Enclosed Inertial Wave Energy Converter with a Nonlinear Stiffness Mechanism
In order to enhance the power generation efficiency and reliability of wave energy converters (WECs), an enclosed inertial WEC with a magnetic nonlinear stiffness mechanism (nonlinear EIWEC) is proposed in this paper. A mathematical model of the nonlinear EIWEC was established based on the Cummins e...
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| Format: | Article |
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MDPI AG
2024-01-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/12/1/191 |
| _version_ | 1797343254592618496 |
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| author | Jian Qin Zhenquan Zhang Xuening Song Shuting Huang Yanjun Liu Gang Xue |
| author_facet | Jian Qin Zhenquan Zhang Xuening Song Shuting Huang Yanjun Liu Gang Xue |
| author_sort | Jian Qin |
| collection | DOAJ |
| description | In order to enhance the power generation efficiency and reliability of wave energy converters (WECs), an enclosed inertial WEC with a magnetic nonlinear stiffness mechanism (nonlinear EIWEC) is proposed in this paper. A mathematical model of the nonlinear EIWEC was established based on the Cummins equation and the equivalent magnetic charge method, and the joint simulations were carried out using MATLAB/Simulink 2020 and AMESim 2020 softwares. The effect of the magnetic nonlinear stiffness mechanism (NSM) on the performance of the EIWEC system was investigated. The results show that the nonlinear negative stiffness property of NSM can significantly improve the motion response and output power of EIWEC under low-frequency waves. Compared to EIWEC without NSM (linear EIWEC), nonlinear EIWEC has a higher generation efficiency and wider frequency bandwidth. Additionally, the effects of linear spring, internal mass body, and hydraulic power take-off (PTO) system parameters on the energy conversion capability of the system were analyzed to provide a reference for the design of nonlinear EIWECs. In general, the proposed nonlinear EIWEC could provide good development potential for the scale utilization of wave energy resources. |
| first_indexed | 2024-03-08T10:45:07Z |
| format | Article |
| id | doaj.art-35251f2650094f3ca0d4efd5ca8dace6 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-08T10:45:07Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-35251f2650094f3ca0d4efd5ca8dace62024-01-26T17:17:55ZengMDPI AGJournal of Marine Science and Engineering2077-13122024-01-0112119110.3390/jmse12010191Design and Performance Evaluation of an Enclosed Inertial Wave Energy Converter with a Nonlinear Stiffness MechanismJian Qin0Zhenquan Zhang1Xuening Song2Shuting Huang3Yanjun Liu4Gang Xue5Institute of Marine Science and Technology, Shandong University, Qingdao 266237, ChinaInstitute of Marine Science and Technology, Shandong University, Qingdao 266237, ChinaInstitute of Marine Science and Technology, Shandong University, Qingdao 266237, ChinaInstitute of Marine Science and Technology, Shandong University, Qingdao 266237, ChinaInstitute of Marine Science and Technology, Shandong University, Qingdao 266237, ChinaInstitute of Marine Science and Technology, Shandong University, Qingdao 266237, ChinaIn order to enhance the power generation efficiency and reliability of wave energy converters (WECs), an enclosed inertial WEC with a magnetic nonlinear stiffness mechanism (nonlinear EIWEC) is proposed in this paper. A mathematical model of the nonlinear EIWEC was established based on the Cummins equation and the equivalent magnetic charge method, and the joint simulations were carried out using MATLAB/Simulink 2020 and AMESim 2020 softwares. The effect of the magnetic nonlinear stiffness mechanism (NSM) on the performance of the EIWEC system was investigated. The results show that the nonlinear negative stiffness property of NSM can significantly improve the motion response and output power of EIWEC under low-frequency waves. Compared to EIWEC without NSM (linear EIWEC), nonlinear EIWEC has a higher generation efficiency and wider frequency bandwidth. Additionally, the effects of linear spring, internal mass body, and hydraulic power take-off (PTO) system parameters on the energy conversion capability of the system were analyzed to provide a reference for the design of nonlinear EIWECs. In general, the proposed nonlinear EIWEC could provide good development potential for the scale utilization of wave energy resources.https://www.mdpi.com/2077-1312/12/1/191wave energy converternonlinear stiffness mechanismhydraulic PTO systemwide bandwidthAMESim |
| spellingShingle | Jian Qin Zhenquan Zhang Xuening Song Shuting Huang Yanjun Liu Gang Xue Design and Performance Evaluation of an Enclosed Inertial Wave Energy Converter with a Nonlinear Stiffness Mechanism Journal of Marine Science and Engineering wave energy converter nonlinear stiffness mechanism hydraulic PTO system wide bandwidth AMESim |
| title | Design and Performance Evaluation of an Enclosed Inertial Wave Energy Converter with a Nonlinear Stiffness Mechanism |
| title_full | Design and Performance Evaluation of an Enclosed Inertial Wave Energy Converter with a Nonlinear Stiffness Mechanism |
| title_fullStr | Design and Performance Evaluation of an Enclosed Inertial Wave Energy Converter with a Nonlinear Stiffness Mechanism |
| title_full_unstemmed | Design and Performance Evaluation of an Enclosed Inertial Wave Energy Converter with a Nonlinear Stiffness Mechanism |
| title_short | Design and Performance Evaluation of an Enclosed Inertial Wave Energy Converter with a Nonlinear Stiffness Mechanism |
| title_sort | design and performance evaluation of an enclosed inertial wave energy converter with a nonlinear stiffness mechanism |
| topic | wave energy converter nonlinear stiffness mechanism hydraulic PTO system wide bandwidth AMESim |
| url | https://www.mdpi.com/2077-1312/12/1/191 |
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