Full Aeroelastic Model Research Articles

Aeroelastic model study of suspended cable roof

The aerodynamic response of a suspended-cable roof over a railway station is examined using a full aeroelastic model in a boundary-layer wind tunnel. The results of the wind-tunnel tests, conducted in thin and thick boundary-layer flow conditions, are presented and compared with those obtained for a section model in smooth and turbulent flow conditions. Vortex-induced oscillation at relatively low wind speed and flutter at high wind speeds were observed in a thin boundary-layer flow. Furthermore, it is shown that the presence of structures beneath the roof results in a sdecrease in the vertical oscillations of the roof. However, a train parked in the station on the upstream track caused an aerodynamic torsional instability for wind speed exceeding 70 mph (113 km/hr).

Construction of boundary layer wind tunnel for long-span bridges

In order to carry out final verification of the aeroelastic safety of the Akashi Kaikyo(strai) Bridge, which has a main span of 1,990 m and two side spans of 960 m and a truss stiffening girder, its full aeroelastic model wind tunnel tests were planned and are now in progress. A geometrical 1 100 scale model was selected and primary dimensions required for the test section of wind tunnel were determined as follows: width 41 m, height 4 m and length 30 m. This paper presents some discussions related to this large boundary layer wind tunnel facility and some new ideas of modeling for the bridge.

Wind tunnel experiments using 3D models and response prediction for a long-span suspension bridge

A series of wind tunnel experiments on a long-span suspension bridge has been conducted. A proposed design for Akashi Straits Bridge having a box stiffening girder was selected as the prototype for full aeroelastic models and taut strip models to a scale of 1:350. The wind-induced response (flutter) under smooth flow and the prediction calculated from the results of sectional model tests using the strip theory are presented. It is found that agreement between experiment and prediction is very good. Response under turbulent flow and its prediction are also presented.

Wind tunnel experiment of long-span suspension bridge using 3D models

A series of wind tunnel experiments on a long-span suspension bridge was conducted. A proposed design for the Akashi Straits Bridge having a box stiffening girder was selected as the prototype for full aeroelastic models and taut strip models to scale 1: 350.In this paper, an outline of the experiment, the wind-induced response (flutter) under smooth flow, and its prediction computed from the results of sectional model tests using “strip theory” are presented. It is found that agreement between experiment and prediction is good.

Parametric study on the behaviour of a full aeroelastic

A full aeroelastic cable-stayed bridge model, at a geometric scale of 1: 75, was studied in the 9m × 9m Wind Tunnel of the National Research Council of Canada. The basic structure simulates a composite cable stayed bridge over the Mississippi River at Quincy, Illinois, U.S.A. The prototype was chosen as a medium size cablestayed bridge typical of current practice. Nine deck section configurations were examined in three different flow regimes that represented scale atmospheric boundary layers . The project was carried out collaborately by the Yokohama National University, the University of Ottawa and the National Research Council of Canada.