On Structural Analysis And Simulation Technique Of The Airborne Chassis

Structure analysis is necessary in the airborne chassis designing. In this paper, the key techniques of structure simulation are studied; the structure analysis system which integrates CAD and CAE is developed. The system realizes automation in structure simulation of chassis.Based on the feasibility of secondary development of Ansys Workbench, the secondary development techniques of its various modules have been studied. The common methods of the secondary development and the key codes involved are given.The emphasis is put on structural analysis and simulation techniques of the airborne chassis. The GJB sinusoidal vibration test, shock vibration test and random vibration test environment in the finite element simulation software implementation technology are studied; According to the equivalent inertial force method, the finite element simulation method of the harmonic base acceleration excitation is discussed, focusing on the theoretical basis of this method and procedures for implementation and use calculation example to understand the program's feasibility and rationality; Based on Gaussian distribution and Miner linear cumulative damage law of three intervals law, completed the fatigue life procedure analysis of airborne chassis and discussed the display fatigue life of the fatigue points; Described the data flow of a variety of analysis process types in structure analysis module and the work processes of structural analysis in structure simulation system.Finally, by integrating structural analysis modules of CAD/CAE, the finite element model of the airborne chassis is established and modal analysis, impact response analysis, harmonic response analysis and random vibration analysis of the structure are carried out. The analysis results are generally consistent with the actual situation, which shows the effectiveness of the structural analysis module.