Abstract: In practical engineering calculation, data transfer between different mesh fields plays an important role in coupled analysis and the method of inverse mapping is required. The paper introduces the available methods of inverse mapping in the literatures and points out the deficiencies of the above methods. Then the method of FEM inverse isoparametric mapping inside the mesh is newly improved and the renewed method of data transfer outside the mesh is introduced. With the detailed introduction of the key problem of programming, the example of the data transfer procedure of temperature field to the stress and strain field in a high arch dam construction process is presented; it is shown that the reliable and accurate results can be achieved with the new method; and this method is simple, efficient and accurate, so as to be used in actual projects conveniently.

Key words: inverse isoparametric mapping, coupled analysis, local coordinates, data transfer, high arch dam