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| Combined PEM-PIM scheme for the non-stationary random vibration analysis of vehicle-bridge systems |
| Received:October 31, 2007 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20091005 |
| KeyWord:vehicle-bridge system precise integration method pseudo-excitation method surface roughness |
| Author | Institution |
| 张志超 |
大连理工大学 运载工程与力学学部工业装备结构分析国家重点实验室,大连 |
| 张亚辉 |
大连理工大学 运载工程与力学学部工业装备结构分析国家重点实验室,大连 |
| 赵岩 |
大连理工大学 运载工程与力学学部工业装备结构分析国家重点实验室,大连 |
| 林家浩 |
大连理工大学 运载工程与力学学部工业装备结构分析国家重点实验室,大连 |
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| Abstract: |
| Non-stationary random vibration of vehicle-bridge coupling systems subjected to the action of irregular road surface is investigated in this paper. Pseudo-excitation method (PEM) is applied firstly to transform the random surface roughness into the superposition of a series of deterministic pseudo harmonic surface unevenness and thus simplifies the solution of the dynamic equations considerably. Three alternative formats of precise integration method (PIM) are presented to compute the vertical vibration responses due to the pseudo harmonic unevenness. They can well simulate the continuous varying of the road forces exerting on the vehicle both in the time and space domains, and thus have remarkably overcome the shortcomings of the conventional numerical integration methods, such as the Newmark method. Numerical results show that, the proposed combined PEM-PIM scheme is much more accurate and efficient than the widely used Newmark method for the random responses analysis of vehicle-bridge coupling systems. |