Techniques for the computational analysis of contact problems in risers

• Grant number: 12/21167-8
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• Start date: January 01, 2013
• End date: July 31, 2013
• Field of knowledge: Engineering - Civil Engineering - Structural Engineering
• Principal Investigator: Paulo de Mattos Pimenta
• Grantee: Alfredo Gay Neto
• Supervisor: Peter Wriggers
• Host Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Institution abroad: Leibniz Universität Hannover, Germany
• Associated to the scholarship: 12/09912-0 - RISERS NONLINEAR DYNAMICS INCLUDING THE UNILATERAL CONTACT WITH THE SEABED, BP.PD

Abstract

Some riser configurations used in ocean applications present a unilateral contact with the seabed. The contact region varies along time, once it depends on the movement induced to the riser by the floating unit, guided by the sea current and ocean waves. The soliciting loads determination in a configuration of this kind is a nonlinear problem due to contact and this may be taken into account in a riser model. The candidate postdoctoral project in Brazil contemplates a 3D dynamic beam model to represent the riser. The contact issue, however, is a very important subject and will be considered in a next step of the project, according to the schedule proposed to the postdoctoral in Brazil. In this project a "computational contact" trainee program was predicted. Indeed, this will be performed from January, 2013 to August, 2013. The objective is to study the "computational contact" topic in a world top ranked institution. There are many techniques for dealing with the contact problem and certainly the choice for the best or the more convenient technique is not straightforward. For that, it is necessary to know the different existenting strategies to make a good choice to be used in the postdoctoral program, in Brazil. Furthermore, the abroad experience in an excellence center will be a unique opportunity for the candidate. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

GAY NETO, ALFREDO; MARTINS, CLOVIS DE ARRUDA. Structural stability of flexible lines in catenary configuration under torsion. MARINE STRUCTURES, v. 34, p. 16-40, DEC 2013. (12/09912-0, 06/06277-0, 12/21167-8)

GAY NETO, ALFREDO; PIMENTA, PAULO M.; WRIGGERS, PETER. Contact between rolling beams and flat surfaces. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, v. 97, n. 9, p. 683-706, MAR 2 2014. (12/09912-0, 12/21167-8)

GAY NETO, ALFREDO; MARTINS, CLOVIS A.; PIMENTA, PAULO M.. Static analysis of offshore risers with a geometrically-exact 3D beam model subjected to unilateral contact. COMPUTATIONAL MECHANICS, v. 53, n. 1, p. 125-145, JAN 2014. (12/09912-0, 06/06277-0, 12/21167-8)