Detection of Cracks in Structures Using Two Crack Transfer Matrix

摘要: Abstract A novel damage detection scheme for multiple crack in a beam like structures is presented, based on transfer matrix (TM) derived from the element with two cracks. Based Linear Elastic Fracture Mechanics (LEFM) principles, modelled as hinge which provides an additional flexibility to element. Each assumed have open edge cracks and new TM called Two Crack Transfer Matrix (TCTM) developed using Finite Element method. Using inverse approach, TCTM used predict beam. The state vector at node includes displacements, forces moments that node; when it multiplied adjacent can be obtained. formed starting node, known initial needs estimated, vectors nodes are predicted TM. Displacement responses measured few structure. mean square error (MSE) between minimized heuristic optimization algorithm, depth location each variables. numerical examples, cantilever sub-structure (SS) of frame nine members solved method also validated experimentally by local identification SS fixed where strain gauges accelerometers. this method, maximum per were successfully identified. suitable large structures.