Finite-difference time-domain method for prediction of structure-borne sound in architecture is proposed in this paper. Under the present circumstances of the PC performance, prediction for a large-scale problem is difficult yet. To solve such a problem, we model the target architecture as compositions of plate elements or beam elements to reduce the dimension of the simulated field to 1 or 2 dimensions in comparison to the situation that the object is discretized by 3-dimensional solid elements, and it results in a memory-saving, and faster calculation. In this report, the basic theory of the FDTD analysis for a model with plate or beam elements is described, and results of a case study for box-type and frame-type structure models are discussed.
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