method for improving the inherent vibration frequency of a mechanical structure

• Main Authors: ZHANG SHENG, ZHANG XINKAN, YU HUIJIE, WANG HAIHUA, WANG SHENLONG, WU RUILIN, DING XIAOHONG, XU FENG
• Format: Patent
• Language: Chinese; English
• Published: 31.05.2019
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention discloses a method for improving the inherent vibration frequency of a mechanical structure. The method comprises the following steps of according to the method, subjecting a mechanicalstructure to a vibration mode test; establishing a finite element model and optimizing the rigidity of a connection part, carrying out modal analysis on the finite element model, confirming a relatively large strain energy position of the mechanical structure through topology optimization, DOE test design and modal strain energy analysis, and improving the inherent vibration frequency of the mechanical structure by arranging a beam unit and verifying the inherent vibration frequency of the mechanical structure. According to the method, test testing and theoretical simulation are combined, thestructural rigidity and the main position influencing the inherent vibration frequency of the mechanical structure are determined by carrying out vibration mode testing and size optimization on the mechanical structure, and th