Abstract: Disclosed is an acoustic analysis apparatus. The acoustic analysis apparatus is configured to allow a user or operator to set a plurality of load input points corresponding to respective sound input sources, and an evaluation point for evaluating a level of a sound pressure transferred from each of the set load input points (S1 to S3). Then, the acoustic analysis apparatus is operable to calculate a sound pressure level-frequency characteristic of a sound pressure from each of a plurality of paths between respective ones of the load input points and the evaluation point, by a finite element method (S5), and display the sound pressure level-frequency characteristic obtained by the calculation, in such a manner as to distinguishably indicate a difference in sound pressure level between the respective sound pressures from the paths.

Abstract: Upon calculating a FEM model of a new model vehicle as a structure to be analyzed using that of an existing vehicle as a prototype structure, a computer sets a plurality of corresponding reference points on the outline of the new model vehicle and the FEM model of the existing vehicle, changes a mesh model included in the FEM model of the existing vehicle to the outer shape of the new model vehicle on the basis of that mesh model and the correspondence between these reference points, and merges additional information contained in the FEM model of the existing vehicle and its associated state with respect to the deformed mesh model, thus calculating the FEM model of the new model vehicle.

Abstract: Upon calculating a FEM model of a new model vehicle as a structure to be analyzed using that of an existing vehicle as a prototype structure, a computer sets a plurality of corresponding reference points on the outline of the new model vehicle and the FEM model of the existing vehicle, changes a mesh model included in the FEM model of the existing vehicle to the outer shape of the new model vehicle on the basis of that mesh model and the correspondence between these reference points, and merges additional information contained in the FEM model of the existing vehicle and its associated state with respect to the deformed mesh model, thus calculating the FEM model of the new model vehicle.