Gap structure dynamic model order reduction method and system based on virtual mass

• Main Authors: LU YUNCHAO, LIU LUGUANG, LI YU, LI ZONGYANG, DOU YIBIN
• Format: Patent
• Language: Chinese; English
• Published: 25.05.2021
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention provides a gap structure dynamic model order reduction method and system based on virtual mass, and the method comprises the steps: S1, employing a finite element method, and building a gap state structure dynamic model and a non-gap state structure dynamic model; S2, adding a virtual mass matrix on a mass matrix of the gap state structure dynamic model to obtain a structure dynamic model containing virtual mass; S3, performing modal calculation on the virtual mass dynamics model to obtain a corresponding modal matrix phi f; S4, performing first order reduction on the non-gap state structure dynamic model by using the modal matrix phi f to obtain a non-gap state dynamic order reduction model after the first order reduction; S5, performing modal calculation on the non-gap state dynamic order reduction model after the first order reduction to obtain a modal matrix xb; S6, constructing a virtual quality reduced-order modal matrix phi b according to the modal matrix x b; and S7, performing secondary