期刊
ADVANCES IN STRUCTURAL ENGINEERING
卷 25, 期 13, 页码 2662-2674出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/13694332221101232
关键词
moving vehicle model; high-speed railway bridge; aerodynamic characteristics; U-shaped launching ramp; wireless acquisition system; wind tunnel test; crosswind
资金
- National Natural Science Foundations of China [52078504, 51925808, U1934209, 52008060]
- State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures [KF2021-05]
- Science and Technology Innovation Program of Hunan Province [2021RC3016]
- China Postdoctoral Science Foundation [2021T140782]
A new aerodynamic measurement technology for moving vehicle models is proposed in this study, which addresses technical obstacles in traditional testing methods. By using a U-shaped launching ramp and a wireless pressure acquisition system, higher accuracy is achieved and the test requirements for the moving vehicle-bridge system are fully met.
The existing moving vehicle models generally require a long test-track to realize the acceleration and deceleration processes and the negative effect of data cables is inevitably for the wind pressure measurement using the traditional pressure scanning system. To address the technical obstacle for moving vehicle models in wind tunnel tests, a new type of aerodynamic measurement technology is presented in this study. Firstly, a piece of new kinetic equipment, a U-Shaped launching ramp, is proposed. The U-Shaped launching ramp can realize the acceleration and deceleration of the vehicle model by gravity and makes full use of the test section of the wind tunnel. Then, a wireless pressure acquisition system is developed to virtually eliminate the negative effects of the inertia and friction forces. By comparing with the conventional wind pressure test data, the proposed wireless pressure acquisition system presents a higher accuracy and fully satisfies the test requirement for the moving vehicle-bridge system. From the scaled test, it is confirmed that the aerodynamic forces of the moving vehicle model are larger than that of the static one, implying that the moving test is necessary for studying the aerodynamic characteristics of the vehicle-bridge coupling system.
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