Ground Vibrations Induced by High-Speed Trains in Regions with Sudden Foundatio...

• Autor(es): Dimitrovová, Zuzana ; Varandas, José N. ; Silva, Manuel A.G.
• Data: 2007
• Identificador Persistente: http://hdl.handle.net/10362/4348
• Origem: Repositório Institucional da UNL
• Assunto(s): high-speed trains, induced vibration, foundation stiffness abrupt changes, dynamic analysis, transient analysis, vehicle-rail-track interaction, methods of integral transformations, analytical solution, numerical analysis, commercial software
• Tipo de Documento: Documento de conferência
• Idioma: Inglês

Descrição

In this paper analytical transient solutions of dynamic response of one-dimensional systems with sudden change of foundation stiffness are derived. In more details, cantilever dynamic response, expressed in terms of vertical displacement, is extended to account for elastic foundation and then two cantilever solutions, corresponding to beams clamped on left and right hand side, with different value of Winkler constant are connected together by continuity conditions. The internal forces, as the unknowns, can be introduced by the same values in both clamped beam solutions and solved. Assumption about time variation of internal forces at the section of discontinuity must be adopted and originally analytical solution will have to include numerical procedure.