关键词: 发动机舱盖；空气压力载荷；颤振试验；有限元分析

Abstract: As the main component that absorbs the collision energy of the vehicle, the deformation and flutter problem of the engine compartment cover under high-speed road driving conditions are important factors affecting the vehicle safety. Based on the requirement of flutter performance of the engine compartment cover, this paper proposes a prediction method for the flutter deformation of the engine compartment cover under high-speed driving conditions. Through finite element simulation calculation, considering the quasi-static loading under gravity, elastic force loading under the action of buffer pad and spring, and multi-dimensional loading condition of air pressure load under high-speed driving conditions, the method definition, model establishment, performance analysis and test check are completed, and the influence of multi-dimensional loading on engine compartment cover flutter is studied, which verifies the feasibility and effectiveness of the development and application of the prediction method.

Key words: Engine compartment cover; Air pressure load; Flutter test; Finite elements analysis