The author conducts a complete and detailed theoretical analysis on the causes of raised grain defect during the fabrication of lattice mesh plate in the numerical control small punch spinning drying equipment in the article.

Considering the phase difference between the total horizontal wave force and total vertical wave force acting on perforated caisson due to the special structure of wave dissipating chamber, this paper describes the phase relation of the wave forces, and sets forth the methods for calculating the simultaneous wave forces on perforated caisson in three cases for sliding stability analysis, .