According to the moving feature of the mould and the relationship between the tool and the blank,the equation of virtual work and the technique of contact element have been established,the contact point model,the contact boundary model,the calculation of the contact force model and the friction model in numerical simulation of the sheet metal forming are also analysed in detail.

Study of the equal residence-time distribution of liquids on large-diameter trays(Ⅰ)Experimental measurement methods and analysis of the distribution pattern of liquid flows;

Analysis and Control on Breakout during Continuous Casting of Heavy Slab Concaster;

A new approachto the dimension Optimization for a structure with large-size plates,thediscretized optimality criteria method is based on the matrix equation in the finite elementanalysis of a plate structure and the Kuhn-Tucker optimum conditions.