Nonlinear structural and vibration analysis of straddle monorail pantograph under random excitations
The dynamic behavior of the straddle monorail pantograph system is significantly influenced by nonlinearities arising from its unique structural configuration and operational environment. This article presents a mathematical model that incorporates both nonlinear geometric and material properties of...
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| Format: | Article |
| Language: | English |
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De Gruyter
2025-04-01
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| Series: | Nonlinear Engineering |
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| Online Access: | https://doi.org/10.1515/nleng-2025-0104 |
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| author | Sun Wenjie Tang Xiaobin |
| author_facet | Sun Wenjie Tang Xiaobin |
| author_sort | Sun Wenjie |
| collection | DOAJ |
| description | The dynamic behavior of the straddle monorail pantograph system is significantly influenced by nonlinearities arising from its unique structural configuration and operational environment. This article presents a mathematical model that incorporates both nonlinear geometric and material properties of the pantograph. A finite element model is utilized to perform modal and static analyses, identifying stress concentrations and dynamic characteristics. To account for random vibration excitations, a nonlinear dynamic response framework is developed, considering vehicle-induced vibrations and network irregularities as stochastic excitation sources. The results demonstrate that these nonlinearities amplify specific resonances under random excitation, leading to increased stress and deformation at critical points. These findings provide a foundation for enhancing fault detection strategies and designing more robust pantographs, with nonlinear vibration monitoring proposed as an effective diagnostic tool. This study contributes to both theoretical understanding and practical improvements in ensuring the reliability and longevity of straddle monorail systems. |
| format | Article |
| id | doaj-art-0240d5d6967d4bf3a83717a2f9b03159 |
| institution | Kabale University |
| issn | 2192-8029 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nonlinear Engineering |
| spelling | doaj-art-0240d5d6967d4bf3a83717a2f9b031592025-08-20T03:53:42ZengDe GruyterNonlinear Engineering2192-80292025-04-011418547710.1515/nleng-2025-0104Nonlinear structural and vibration analysis of straddle monorail pantograph under random excitationsSun Wenjie0Tang Xiaobin1College of Traffic and Transportation, Chongqing Jiaotong University, Chongqing, 400074, ChinaChongqing Vocational Institute of Engineering, Chongqing, 402260, ChinaThe dynamic behavior of the straddle monorail pantograph system is significantly influenced by nonlinearities arising from its unique structural configuration and operational environment. This article presents a mathematical model that incorporates both nonlinear geometric and material properties of the pantograph. A finite element model is utilized to perform modal and static analyses, identifying stress concentrations and dynamic characteristics. To account for random vibration excitations, a nonlinear dynamic response framework is developed, considering vehicle-induced vibrations and network irregularities as stochastic excitation sources. The results demonstrate that these nonlinearities amplify specific resonances under random excitation, leading to increased stress and deformation at critical points. These findings provide a foundation for enhancing fault detection strategies and designing more robust pantographs, with nonlinear vibration monitoring proposed as an effective diagnostic tool. This study contributes to both theoretical understanding and practical improvements in ensuring the reliability and longevity of straddle monorail systems.https://doi.org/10.1515/nleng-2025-0104nonlinear dynamicsrandom vibrationstraddle monorail pantograph |
| spellingShingle | Sun Wenjie Tang Xiaobin Nonlinear structural and vibration analysis of straddle monorail pantograph under random excitations Nonlinear Engineering nonlinear dynamics random vibration straddle monorail pantograph |
| title | Nonlinear structural and vibration analysis of straddle monorail pantograph under random excitations |
| title_full | Nonlinear structural and vibration analysis of straddle monorail pantograph under random excitations |
| title_fullStr | Nonlinear structural and vibration analysis of straddle monorail pantograph under random excitations |
| title_full_unstemmed | Nonlinear structural and vibration analysis of straddle monorail pantograph under random excitations |
| title_short | Nonlinear structural and vibration analysis of straddle monorail pantograph under random excitations |
| title_sort | nonlinear structural and vibration analysis of straddle monorail pantograph under random excitations |
| topic | nonlinear dynamics random vibration straddle monorail pantograph |
| url | https://doi.org/10.1515/nleng-2025-0104 |
| work_keys_str_mv | AT sunwenjie nonlinearstructuralandvibrationanalysisofstraddlemonorailpantographunderrandomexcitations AT tangxiaobin nonlinearstructuralandvibrationanalysisofstraddlemonorailpantographunderrandomexcitations |