Abstract: Due to the limitation of living space, washing machine products usually need to be embedded during decoration. In order to make up for the lack of space, develop ultra-thin box, large capacity drum washing machine, which puts forward higher requirements for the design of the ultra-thin cabinets. Take the ultra-thin box of the drum washing machine as the research object, use Simcenter3D simulation software to model the first ten natural frequencies of the cabinets. At the same time, use ARMA time series model and stability graph method to quickly identify the reliability of simulation results, which provide strong technical support for the optimization of the structural design of the ultra-thin cabinets in the future.

Key words: Drum washing machine, Ultrathin case, ARMA model, Stabilization diagram method