公开(公告)号：US20200226309A1

公开(公告)日：2020-07-16

申请号：US16647516

申请日：2018-04-18

Applicant: SOUTHEAST UNIVERSITY

Inventor： Yanbin LI ,  Peng ZHANG ,  Qingguo FEI ,  Shaoqing WU ,  Xuan YANG ,  Dong JIANG

IPC: G06F30/23 ,  G01H17/00 ,  G06F17/16

Abstract: A dynamic response analysis method based on a dual-mode equation in a random noise environment includes the following steps: (1) dividing a structure and an acoustic cavity in an acoustic-structural coupling system into different subsystems; (2) calculating modes of the structural subsystems and the acoustic cavity subsystems; (3) calculating inter-mode coupling parameters in adjacent subsystems; (4) establishing a dual-mode equation of the coupling system; (5) by means of pre-processing, obtaining a cross power spectrum of generalized force loads applied on the subsystem modes under the action of a random load; (6) calculating the dual-mode equation to obtain cross power spectra of all participation factors of all modes; and (7) by means of modal superposition, calculating a random acoustic-structural coupling response of the system.