| Texto completo | |
| Autor(es): |
Neto, Alfredo Gay
;
Pimenta, Paulo de Mattos
;
Martins, Clovis de Arruda
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF ENGINEERING MECHANICS; v. 143, n. 4 APR 2017. |
| Citações Web of Science: | 3 |
| Resumo | |
This work presents a derivation of equivalent loads, coming from the integration of hydrostatic pressure fields on the internal and external walls of a curved pipe, which is modeled as a Euler-Bernoulli beam. To achieve that, the divergence theorem is applied to an infinitesimal-length pipe element. The Frenet coordinate system is used, leading to convenient simplifications. Finally, an expression is obtained for the equivalent distributed load along the pipe, due to pressure fields. Such load has a follower behavior and is curvaturedependent. Discussions are made, revisiting the effective tension and effective moment classical concepts, such as relating the proposed derivation with those concepts. An example of application is made in the context of analytical beam models, which is compared to a solid finite element model, experiencing a hydrostatic pressure field. Lastly, the obtained formulas are applied to an example of nonlinear buckling analysis of an initially straight pipeline, under constant internal pressurization. The postcritical configuration is obtained by using a geometric nonlinear finite element model, composed of beams, which are loaded using the expressions derived in this paper. (C) 2017 American Society of Civil Engineers. (AU) | |
| Processo FAPESP: | 15/11655-3 - Modelo estrutural para estudo da dinâmica de pás de turbinas eólicas |
| Beneficiário: | Alfredo Gay Neto |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |