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| Study on vertical vibration response of simply supported rectangular thin-walled box girder subjected to uncertain moving eccentric load |
| Received:January 05, 2023 Revised:January 30, 2023 |
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| DOI：10.7511/jslx20230105002 |
| KeyWord:simply supported rectangular thin-walled box girder moving eccentric load interval process vertical vibration dynamic response boundary |
| Author | Institution |
| 黄文建 |
西南交通大学 机械工程学院, 成都 |
| 刘放 |
西南交通大学 机械工程学院, 成都 |
| 杨明发 |
西南交通大学 机械工程学院, 成都 |
| 李晨晖 |
西南交通大学 机械工程学院, 成都 |
| 邓蓉 |
西南交通大学 机械工程学院, 成都 |
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| Abstract: |
| Aiming at solving the vibration problem of a thin-walled box girder subjected to an uncertain moving eccentric load in engineering,a method based on interval process is proposed to determine the vertical vibration response boundary of a simply supported rectangular thin-walled box girder structure.Based on the modified Timoshenko beam theory,Umanskii’s second theory and box girder deformation theory,the analytical solution of the forced vertical vibration of a simply supported rectangular thin-walled box girder considering section torsion and distortion under a moving eccentric load is obtained.The calculation process of vertical vibration response boundary of simply supported rectangular box girder is derived by introducing interval process to describe the uncertainty of moving eccentric load,and the influence of the correlation of uncertain parameters and load speed on the vertical vibration response of the simply supported rectangular thin-walled box girder is analyzed.The correctness of the method in this paper is verified by comparison with the calculation results of the finite element method. |