DEVELOPMENT OF A MODELLING APPROACH FOR LARGE GRANULAR MEDIA USED IN COASTAL APPLICATIONS
The modelling approach under development aims to fill a major technical gap that has inhibited advances in breakwater and coastal engineering for the last 50 years. Since the early 1980s it has been clear that lab-scale physical hydraulic models on their own are unable to represent full-scale strength behaviour for concrete elements. Substantial and complicated efforts have therefore been required to avoid structural failure of concrete armour units. To fill this knowledge gap, advanced 3D fluids and solids computational methods are being developed that will have the capability, when combined, to cover all the important processes. Key components are (a) realistic wave modelling using adaptive unstructured meshing, coupled to (b) a discrete element model for the movement of solid elements with (c) finite element modelling of stresses/structural failure for the solid bodies.These form a FEM-based multi-physics, multi-scale framework to capture extreme stress transients for modelling fluid-structure interactions in coastal structures. The paper describes research results achieved to date and proposals for methods to address the development of wave simulation and its application to breakwater and coast protection armour unit stability/breakage. The long-term aim is to study the grand challenge problem of breakwater armour layers i.e. massive granular systems under wave attack using a new numerical wave tank. This is crucial as it will allow detailed studies of problems that have not been addressed before such as stress levels transmitted to units during storms, how wave energy dissipates and how these structures may be optimised,
wave-structure interaction combined finite-discrete element solid-fluid coupling breakwaters concrete armour units
J.P.Lathamt J.Mindel J.Xiang X.Garcia C.Pain G.Gorman A.Munjiza
Department of Earth Science and Engineering,Imperial College,London,UK Department of Engineering,Queen Mary London University,London,UK
国际会议
北京
英文
122-130
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）