New solution of shaker's supporting structure intended to railway bridges testing (original) (raw)
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2006, DAAAM International Publishing eBooks
The dynamic performances of railway bridges structures under the train loads come into more and more prominence with development of high-speed railways being built in the world. It forces to develop some methods to test them. The aim of this study was to develop a new shaker's supporting structure to inspect railway bridges dynamic parameters and perform some dynamic tests for shaker-framedynamometers structure. A special frame transferring the excitations to the rails was designed and produced. Then it was tested together with the shaker. Some results of laboratory tests were presented. The shaker together with a new construction of the supporting frame, adopted to its fastening to rails, fulfill all the functional assumptions, i.e. they allow to: permanently measure components of the excitation forces during the railway bridge inspections, temporarily attach the wheel system for the transport purposes and raise/lower the system for attaching/detaching wheels and fastening/removing dynamometers. The shaker with the supporting system allows obtaining an excitation force with a stable frequency and the amplitude deviations no larger then 5% of nominal value. The deviations get smaller when the excitation frequency and resulting excitation force increase.
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