Field test and numerical studies of the scissors-AVLB type bridge

• Autorzy: Krason W. , Malachowski J.

Identyfikatory

DOI

10.2478/bpasts-2014-0012

• Języki publikacji: EN

Abstrakty

EN

Scissor bridges are characterized by high mobility and modular structure. A single module-span consists of two spanning parts of the bridge; two main trucks and the support structure. Pin joints are used between modules of the single bridge span. Some aspects of the experimental test and numerical analysis of the scissor-AVLB type bridge operation are presented in this paper. Numerical analyses, presented here, were carried out for the scissors-type BLG bridge with treadways extended as compared to the classical bridge operated up to the present in the Armed Forces of the Republic of Poland. A structural modification of this kind considerably affects any changes in the effort of the force transmitting structure of the bridge. These changes may prove to be disadvantageous to the whole structure because of torsional moments that additionally load the treadways. Giving careful consideration to such operational instances has been highly appreciated because of the possibility of using this kind of bridges while organizing the crossing for vehicles featured with various wheel/track spaces (different from those used previously). The BLG bridge was numerically analysed to assess displacements and distributions of stresses throughout the bridge structure in different loading modes. Because of the complexity of the structure in question and simplifications assumed at the stage of constructing geometric and discrete models, the deformable 3D model of the scissors-type bridge needs verification. Verification of the reliability of models was performed by comparing deflections obtained in the different load modes that corresponded with tests performed on the test stand. It has been shown that the examined changes in conditions of loading the treadways of the bridge are of the greatest effect to the effort of the area of the joint which is attached to the girder bottom. Stress concentrations determined in the analysis are not hazardous to safe operation of the structure.

Słowa kluczowe

EN

scissor-AVLB type bridge; experimental test; numerical FE analysis

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2014
• Tom: Vol. 62, nr 1
• Strony: 103--112
• Opis fizyczny: Bibliogr. 8 poz., rys., tab., wykr., fot.

Twórcy

autor

Krason W.

• Department of Mechanics and Applied Computer Science, Military University of Technology, 2 Gen. Sylwestra Kaliskiego St., 00-908 Warsaw, Poland

autor

Malachowski J.

• Department of Mechanics and Applied Computer Science, Military University of Technology, 2 Gen. Sylwestra Kaliskiego St., 00-908 Warsaw, Poland

Bibliografia

• [1] Ministry of National Defence in Poland, “Military bridges”, MND Manual, MND, Warsaw, 1994, (in Polish).
• [2] Ministry of National Defence in United Statets, “Trilateral designe and test code for military bridging and gap-crossing equipment”, Operational Manual, MND, New York, 1996.
• [3] W. Krason and L. Filiks, “Rigid and deformable models in the numeriacal strength tests of scissor bridge”, WAT Bulletin LVII 2 (650), 103-116, (2008), (in Polish).
• [4] W. Krason and M. Wieczorek, Strength of the Floating Bridges - Computer Aspect, p. 269, Military University of Technology, Warsaw, 2004, (in Polish).
• [5] G. Rakowski and Z. Kacprzyk, Finite Element Method in Mechanics of Structures, Warsaw University of Technology Publishing House, Warsaw, 1993, (in Polish).
• [6] E. Rusinski, J. Czmochowski, and T. Smolnicki, Advanced Finite Element Method for Load-carrying Structures of Machines, Wroclaw University Press, Wroclaw, 2000, (in Polish).
• [7] MSC Sottware, MSC Reference Manual, “MSC Patran/Nastran, Version r2”, MSC. Software, New York, 2005.
• [8] L. Czechowski and T. Kubiak, “Analysis of thin-walled girders subjected to a pulse torsional torque”, J KONES Powertrain and Transport 19 (1), 51-62 (2012).