Development of a Novel Aerodynamic Solution to Mitigate Large Vibrations in Traffic Signal Structures
| 项目名称： | Development of a Novel Aerodynamic Solution to Mitigate Large Vibrations in Traffic Signal Structures |
| 摘要： | This project will develop and test an aerodynamic damping method to minimize large vibrations in traffic signal structures. Work in Stage 1 will begin with mapping out the dimensions and shapes for the signal lights. A modular construction approach for test samples will be implemented to allow testing more configurations. Wind tunnel tests will be conducted to extract aerodynamic parameters that influence the response of the signal light structure. Three types of tests will be conducted: static tests for parameters governing mean buffeting and fluctuating buffeting forces and response; dynamic one-degree-of-freedom (vertical) tests in free vibration for parameters governing vortex shedding induced vibration; and dynamic two-degree-of-freedom (along-wind and across-wind) tests in free vibration for parameters influencing the self-excited forces (flutter derivatives/rational functions). In Stage 2, finite element models of the test set-ups will be generated and validated with results from the tests. Additional models with different parameters will be created to conduct sensitivity analysis on the influence of different parameters. A conventional traffic signal will be chosen as the benchmark and another one will be equipped with the newly-designed signal lights on a roadway with similar attributes and similar loading. Both structures will be monitored and improvement in the performance of the new design will be demonstrated by measuring signal vibrations in addition to stresses experienced at the connections. The final report will include all data and test results along with specifications and guidelines for the new aerodynamic vibration mitigation technique as well as plans for its commercialization and implementation by state DOTs. |
| 状态： | Active |
| 资金： | 136670 |
| 资助组织： | Federal Highway Administration |
| 项目负责人： | Jawed, Inam |
| 执行机构： | Iowa State University |
| 主要研究人员： | Alipour, Alice |
| 开始时间： | 20180814 |
| 预计完成日期： | 0 |
| 实际结束时间： | 0 |
相关文献
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