Apparatus for and method of analyzing coupling characteristics

Claim 1

An apparatus for analyzing coupling characteristics of a system consisting of a plurality of unit structures coupled to one another and having respective physical characteristics comprising: a first memory for storing physical data of each of said unit structures; a plurality of calculating means each for calculating a transfer function matrix of each of said unit structures according to said physical data; a second memory for storing definitions of co-ordinate conversion data and coupling concerning said unit structures a plurality of co-ordinate conversion means for generating co-ordinate conversion matrices from said co-ordinate conversion data and converting said transfer function matrices into those for the system; coupling means for coupling together said transfer function matrices in said system according to said definitions of coupling and generating transfer function matrices concerning said coupled system; eigen value analysis means for analyzing an eigen mode and mode shape of said coupled system according to said transfer function matrices; a third memory for storing forcing function data in the time domain with respect to each of said unit structures; Fourier analysis means for converting said forcing function data into those in the frequency domain; response analysis means for analyzing a response in the frequency domain concerning a point of measurement of said coupled system according to the transfer function matrices from said coupling means and forcing function data in the frequency domain; and inverse Fourier analysis means for converting the results of said response analysis into those in the time domain.

Claim 2

An apparatus for analyzing coupling characteristics of a system consisting of a plurality of unit structures coupled to one another and having respective physical characteristics comprising: a first memory for storing physical data of each of said unit structures; a plurality of calculating means each for calculating a transfer function matrix of each of said unit structures according to said physical data; a second memory for storing definitions of co-ordinate conversion data and coupling concerning said unit structures a plurality of co-ordinate conversion means for generating co-ordinate conversion matrices from said co-ordinate conversion data and converting said transfer function matrices into those for the system; coupling means for coupling together said transfer function matrices in said system according to said definitions of coupling and generating transfer function matrices concerning said coupled system; eigen value analysis means for analyzing an eigen mode and mode shape of said coupled system according to said transfer function matrices; a third memory for storing forcing function data in the time domain with respect to each of said unit structures; Fourier analysis means for converting said forcing function data into those in the frequency domain; response analysis means for analyzing a response in the frequency domain concerning a point of measurement of said coupled system according to the transfer function matrices from said coupling means and forcing function data in the frequency domain; and inverse Fourier analysis means for converting the results of said response analysis into those in the time domain.

Claim 4

A method of analyzing coupling characteristics comprising: a step of calculating a transfer function matrix of each of a plurality of unit structures from physical data thereof; a step of generating co-ordinate conversion matrices from co-ordinate conversion data of each of said unit structures, and converting said transfer function matrices into those for the system; a step of coupling together said transfer function matrices in said system according to definitions of coupling and generating transfer function matrices concerning a coupled system obtained by coupling together said unit structures; a step of analyzing an eigen mode and mode shape of said coupling system according to said transfer function matrices; a step of converting vibration application data in the time domain with respect to said unit structures through Fourier analysis into those in the frequency domain; a step of analyzing a response to vibrations in the frequency domain concerning a point of measurement on said coupled system from the transfer function matrices of said coupled system and forcing function data in the frequency domain; and a step of performing inverse Fourier conversion of the results of said response analysis into those in the time domain.

Claim 5

A method of analyzing coupling characteristics comprising: a step of calculating a transfer function matrix of each of a plurality of unit structures from physical data thereof; a step of generating co-ordinate conversion matrices from co-ordinate conversion data of each of said unit structures, and converting said transfer function matrices into those for the system; a step of coupling together said transfer function matrices in said system according to definitions of coupling and generating transfer function matrices concerning a coupled system obtained by coupling together said unit structures; a step of analyzing an eigen mode and mode shape of said coupling system according to said transfer function matrices; a step of converting vibration application data in the time domain with respect to said unit structures through Fourier analysis into those in the frequency domain; a step of analyzing a response to vibrations in the frequency domain concerning a point of measurement on said coupled system from the transfer function matrices of said coupled system and forcing function data in the frequency domain; and a step of performing inverse Fourier conversion of the results of said response analysis into those in the time domain.