Author(s)

Masa. Tanaka, T, Matsumoto & Y. Arai

Abstract

Application of BEM and cellular automata to determining optimal shapes of the sound-insulating wall M. Tanaka', T. Matsumotol & Y. Arai2 'Department of Mechanical Systems Engineering, Shinshu University, Nagano City, Japan. 2Graduate School of Shinshu University, Japan. 1 Introduction There are many optimizing procedures using sensitivity analysis or genetic algorithms, and they are successfidly applied to a wide varaiety of practical problems. In general, however, an optimizing procedure using sensitivity analysis frequently fails to find the global minimum of an objective function, depending on the initial values of parameters. The present paper is concerned with application of cellular automata [I] [2] [3] [4] [5] combined with the boundv element method to finding optimal shapes of the sound-insulating wall. In application of the cellular automata, the domain of interest is discretized into a number of uniform cells. Some quantity defining the cell state is assigned each cell, and then modi

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