similarity theorem
2.1. Different from those one-dimensional models, this paper includes all variables that affect the transient and time-dependent surface tempreture difference, and establishs a three-dimensional thermodynamic similarity model by means of dimension concordant principle and Buckingham theorem.
3.Dynamic similarity criteria for large displacements & deformations of structures with elastio plastic material are presented. The Buckingham Pi theorem and the Dimensional Matrix Analysis Method are used.

