Abstract
In the several engineering fields, the collision between structures and foreign objects involve some difficulties in the numerical treatment because intensity, contact area and the time history of the impact load are not known. Some experimental techniques have been suggested to measure the distributed load by a piezo-electric sensor. However, such a direct measurement often meet with difficulty, because the geometry or rigidity of the contact surface may be altered by attaching the sensors on the surface. In order to overcome the difficulty, this paper deals with estimation of pressure distribution applied to the elastic body using inverse analysis. In the present study, the coefficient matrix is introduced which gives linear relation between distributed load and internal strain. The coefficient matrix can be determined by experimentally measured data of strain produced by concentrated loading. In order to increase the accuracy of the identified pressure, regularization technique suggested by Kubo is employed to stabilize the solutions. A numerical simulation on the circular plate subjected to transverse distributed loading is conducted to demonstrate the effectiveness of the present method.
