DYNAMIC STABILITY OF ARMOR UNITS - A BEM APPROACH

[摘要] A method is presented for predicting primary stability of armor units on a breakwater exposed to solitary waves. A 2-D flow model is developed based on a boundary element method for simulating run-up of a nonbreaking solitary wave on an impermeable, smooth slope. Since Laplace equation subject to exact boundary conditions is solved by the model, the 'mild slope' restriction in using a 1-D long wave model is eliminated. Schemes including inductive wave generation, Lagrangian shoreline motion and free surface regridding are proposed. The run-up flow model is then coupled with an armor stability model to predict a stability number for armor units as function of time and location on the slope. Aspects such as applicability of Morison-type approach and selection of lift coefficient are examined. Results of computed wave run-up and armor stability are compared with experimental data.

[学科分类] 建筑学

[关键词] dynamic stability;armor units;BEM approach