This paper sums up disturbance gravitational computation methods(Bjerhammar, suppositional point mass, suppositional single layer density) by using operator operational method.

For the simulation accuracy of springback problem in sheet metal forming,the effect of punch virtual velocity and sheet virtual density on the sheet strain energy was studied in this paper.

Conjugate heat transfer of transient thermal conduction,natural convection and thermal radiation with internal heat sources is simulated numerically using PHOENICS(Version 1 4) with the false density method.

Application of virtual laminated element in the shape optimization of beam and arch;

By the method of transforming the node DOF of the space bar element to the node DOF of the space virtual laminated element,that is,the node of bar element need not fixed on the node of space solid element,the prestressed concrete structure were simulated together.

Based on the virtual laminated element theory and program,the concept of equivalent node force was adopt to make a program,with which the spatial effect induced by post successive pre-stress of a simply supported and continuous spread boxes bridge was analyzed.

The effect of prestressed steel bars on bridge structure is transformed to the equivalent loads,then an approach of analyzing prestressed concrete bridge is presented with virtual laminated element method.