公开(公告)号：US20180128675A1

公开(公告)日：2018-05-10

申请号：US15575563

申请日：2016-04-27

Applicant: HITACHI, LTD.

Inventor： Yosuke TANABE ,  Masanori WATANABE ,  Naoki YONEYA

IPC: G01H17/00 ,  G06F17/50

Abstract: A problem of the present invention is to provide a vibration analysis program capable of analyzing bidirectional exchanges between a distribution amount and a difference amount with respect to an external system of the part in a part modeled as a finite element, in which the difference amount accumulation characteristic and the distribution amount accumulation characteristic are distributed. A vibration analysis program of the present invention includes a first step 6 of importing a finite element model of a target part modeled by a finite element method program 4 to calculate an accumulation characteristic matrix and connection matrix, a second step 8 of calculating a difference amount-distribution amount mode matrix and eigenvectors after inputting 7 an attenuation characteristic to the accumulation characteristic matrix or the connection matrix as necessary, and a third step 14 of importing an input difference amount-flow amount vector to a target part obtained from an external system simulator 9, performing a mode coordinate transformation of the input difference amount-flow amount vector, calculating the mode vector response, and performing physical coordinate transformation of mode vector.