Theory and implementation of sub-model method in finite element analysis

Finite Element Analysis and Validation of Wind Turbine Bearings

“…Therefore, in the present study, a coarse mesh was generated in the global model analysis to calculate the displacement, and then, a fine mesh was generated in the sub-model analysis with cut boundary constraints to calculate the contact stress. The global analysis and sub-model technique were based on the research of Sanit Vanant [20], stating that there is no stress difference between concentrated and distributed loads when the location of the load is far away, and the research of Liu [21], stating that the lattice density has a large effect on stress but no effect on displacement in static analysis, C hang [22] is based on (2-D) beam element model, the theory of sub-model was theoretically deduced, based on sub-modeling technique of nodal displacements, the results of the global model and the sub-model for the skew bridge were compared and studied in terms of stress field and plastic damage of concrete. Therefore, if the displacement obtained from the global analysis is input as the boundary condition of the sub-modeling analysis, reasonable analysis accuracy can be expected.…”