Theoretical Studies on the Longitudinal Inhomogeneity of Track Stiffness and a Track Status Estimation Method
Due to material multiplicity, rigid-flexible hybrid and environmental variations, and so forth, the properties of the tracks will be inevitably changed due to the cyclic loads temporally and spatially. In this paper, a theoretical study is conducted to clarify the influence of the longitudinal inhom...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/8847633 |
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| _version_ | 1849414159083503616 |
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| author | Wen Bai Lei Xu |
| author_facet | Wen Bai Lei Xu |
| author_sort | Wen Bai |
| collection | DOAJ |
| description | Due to material multiplicity, rigid-flexible hybrid and environmental variations, and so forth, the properties of the tracks will be inevitably changed due to the cyclic loads temporally and spatially. In this paper, a theoretical study is conducted to clarify the influence of the longitudinal inhomogeneity of track stiffness on system responses and then a general state estimation method is proposed to inversely predict the parametric distribution of the tracks. To achieve these purposes, a 3D nonlinear vehicle-track coupled model is firstly constructed, where track systems are established by the finite element method with random parameters. Based on this dynamic model, the distribution characteristics of system responses due to random parametric excitations are properly revealed. The numerical studies show that the longitudinal inhomogeneity of track supporting stiffness has significant effects on system responses; besides, the response distributions are varied against different parametric distributions. Finally, a representative example is demonstrated to show the effectiveness of the proposed track state estimation method. |
| format | Article |
| id | doaj-art-6e520f2fec574501bfdafa1867f71e39 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-6e520f2fec574501bfdafa1867f71e392025-08-20T03:33:54ZengWileyAdvances in Civil Engineering1687-80861687-80942021-01-01202110.1155/2021/88476338847633Theoretical Studies on the Longitudinal Inhomogeneity of Track Stiffness and a Track Status Estimation MethodWen Bai0Lei Xu1Key Laboratory of Earthquake Engineering and Vibration Engineering, Institute of Engineering Mechanics, China Earthquake Administration, Harbin, Heilongjiang 150080, ChinaSchool of Civil Engineering, Central South University, Changsha 410075, ChinaDue to material multiplicity, rigid-flexible hybrid and environmental variations, and so forth, the properties of the tracks will be inevitably changed due to the cyclic loads temporally and spatially. In this paper, a theoretical study is conducted to clarify the influence of the longitudinal inhomogeneity of track stiffness on system responses and then a general state estimation method is proposed to inversely predict the parametric distribution of the tracks. To achieve these purposes, a 3D nonlinear vehicle-track coupled model is firstly constructed, where track systems are established by the finite element method with random parameters. Based on this dynamic model, the distribution characteristics of system responses due to random parametric excitations are properly revealed. The numerical studies show that the longitudinal inhomogeneity of track supporting stiffness has significant effects on system responses; besides, the response distributions are varied against different parametric distributions. Finally, a representative example is demonstrated to show the effectiveness of the proposed track state estimation method.http://dx.doi.org/10.1155/2021/8847633 |
| spellingShingle | Wen Bai Lei Xu Theoretical Studies on the Longitudinal Inhomogeneity of Track Stiffness and a Track Status Estimation Method Advances in Civil Engineering |
| title | Theoretical Studies on the Longitudinal Inhomogeneity of Track Stiffness and a Track Status Estimation Method |
| title_full | Theoretical Studies on the Longitudinal Inhomogeneity of Track Stiffness and a Track Status Estimation Method |
| title_fullStr | Theoretical Studies on the Longitudinal Inhomogeneity of Track Stiffness and a Track Status Estimation Method |
| title_full_unstemmed | Theoretical Studies on the Longitudinal Inhomogeneity of Track Stiffness and a Track Status Estimation Method |
| title_short | Theoretical Studies on the Longitudinal Inhomogeneity of Track Stiffness and a Track Status Estimation Method |
| title_sort | theoretical studies on the longitudinal inhomogeneity of track stiffness and a track status estimation method |
| url | http://dx.doi.org/10.1155/2021/8847633 |
| work_keys_str_mv | AT wenbai theoreticalstudiesonthelongitudinalinhomogeneityoftrackstiffnessandatrackstatusestimationmethod AT leixu theoreticalstudiesonthelongitudinalinhomogeneityoftrackstiffnessandatrackstatusestimationmethod |