Aspects aléatoires de l'érosion d'une digue : simulations de la brèche par des algorithmes génétiques
| Autor: | Claude Marche, Tew-Fik Mahdi, Ousmane Seidou |
|---|---|
| Rok vydání: | 2004 |
| Předmět: | |
| Zdroj: | Canadian Journal of Civil Engineering. 31:927-942 |
| ISSN: | 1208-6029 0315-1468 |
| DOI: | 10.1139/l04-097 |
| Popis: | Attempts to forecast the final form of a dam-break suffer from various uncertainty sources such as field data (topography, hydraulic and geotechnical parameters), and modeling assumptions. So the result seems to be at least partially chaotic and difficult to match with the objectives of the dam-safety engineers in which the goal is to model dam-break flow evolution in time. On the other hand, the principle of minimal energy dissipation rate makes it possible to predict the shape towards which the geometry of the breach will evolve to under stationary hydraulic conditions. In this article, one uses energy minimization by a genetic algorithm to integrate at the same time the two concepts of random result and convergence towards an equilibrium state. They are used to simulate the submersion failure of a clay dam, and the results agree reasonably with the field data. This approach makes it possible to obtain as realistic breach shapes as those obtained by actual models, and to introduce a random component in the process of dam-breach formation, which remains, however, guided by a physical principle.Key words: erosion, dam breach, genetic algorithms, sediment transport. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|