Based on an analysis of connotation and extension of the concept of the orthogonal curvilinear coordinates, we have deduced a platform of strain tensor expression of Cartesian coordinates, which turns out hp 27xq to be a function of Lame coefficient and unit vector.By using transform matrix between Cartesian coordinates and orthogonal curvilinear c

As the accident of a vessel impacting a bridge pier will cause serious disaster, such as destroyed bridge, sinking ship and polluting environment, the technology and method to protect bridge pier from ship collision have been widely investigated recently.Due to the huge kinetic energy of large-tonnage ship and the short time duration in the collisi