ANALYSIS DEVICE AND ANALYSIS METHOD

摘要

An analysis device constructs an analytical model with a circuit board and a medium, and applies a concentrated load grouping composed of concentrated loads to the circuit board. In this case, the concentrated loads are established such that the sum of the respective vectors is zero, and such that the torque is zero with respect to the center of gravity. The analysis device applies a finite element method to the analytical model to figure out the vibration of the circuit board, which is caused when the concentrated loads vibrate with a constant period. The change in the pressure of the medium is computed from the vibration of the circuit board, and the change in the pressure is converted to a sound pressure.

主权项

1. An analysis device that uses a finite element method to analyze an acoustic noise phenomenon of a circuit board with a multilayer ceramic capacitor mounted thereon, the analysis device comprising:
a model construction that constructs an analytical model with the circuit board and a medium; a concentrated load grouping application that applies a concentrated load grouping including multiple concentrated loads configured such that the sum of respective vectors is zero and such that the torque is zero with respect to the center of gravity, to the circuit board of the analytical model in accordance with the multilayer ceramic capacitor; a board vibration calculation that figures out vibration of the circuit board with the concentrated load grouping applied thereto, when the magnitudes of the respective concentrated loads are periodically changed with time; and a sound pressure calculation that figures out a sound pressure in the medium on the basis of the change in pressure of the medium due to the vibration of the circuit board.