Abstract: The washing machine cabinet is the key core component. In the process of high-speed dehydration, the box is excited and vibrates, and in order to avoid resonance, a certain margin needs to be reserved for the first-order natural frequency of the box. During the transportation of the washing machine, the box is an appearance part, and if it is obviously dropped and deformed, it will seriously affect the user experience. In this paper, the finite element model of the box and the packaging of the whole machine is established, the static and modal analysis of the box is carried out, and the drop simulation analysis of the whole machine is carried out. The deformation distribution map of the box was obtained, and the structure was optimized, and the performance was significantly improved. This paper can provide theoretical guidance for the design of core components of washing machines.

Key words: Modal analysis, Stiffness, PEEQ