A nonlinear vehicle-structure interaction methodology with wheel-rail detachment and reattachment

• Type: Article in International Conference Proceedings Book
• Date: 2013

Authors

Pedro Aires Montenegro (Author) Other; Neves, SGM (Author) Other; Azevedo, AFM (Author) Other; Rui Calçada (Author) FEUP

Conference proceedings International

Title: ECCOMAS Thematic Conference - COMPDYN 2013: 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Proceedings - An IACM Special Interest Conference

Pages: 416-429

4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, COMPDYN 2013

Kos Island, 12 June 2013 through 14 June 2013

Indexing

Scopus - 20 Citations

Other information

Authenticus ID: P-009-CK1

Abstract (EN): A vehicle-structure interaction methodology with a nonlinear contact formulation based on contact and target elements has been developed. To solve the dynamic equations of motion, an incremental formulation has been used due to the nonlinear nature of the contact mechanics, while a procedure based on the Lagrange multiplier method imposes the contact constraint equations when contact occurs. The system of nonlinear equations is solved by an efficient block factorization solver that reorders the system matrix and isolates the nonlinear terms that belong to the contact elements or to other nonlinear elements that may be incorporated in the model. Such procedure avoids multiple unnecessary factorizations of the linear terms during each Newton iteration, making the formulation efficient and computationally attractive. A numerical example has been carried out to validate the accuracy and efficiency of the present methodology. The obtained results have shown a good agreement with the results obtained with the commercial finite element software ANSYS.

Language: English

Type (Professor's evaluation): Scientific