Search

One of the major challenges in mesh-based deformation simulation in computer graphics is to deal with mesh distortion. In this paper, we present a novel mesh-insensitive and softer method for simulating deformable solid bodies under the assumptions of linear elastic mechanics. A face-based strain smoothing method is adopted to alleviate mesh distortion instead of the traditional spatial adaptive smoothing method. Then, we propose a way to combine the strain smoothing method and the corotational method. With this approach, the amplitude and frequency of transient displacements are slightly affected by the distorted mesh. Realistic simulation results are generated under large rotation using a linear elasticity model without adding significant complexity or computational cost to the standard corotational FEM. Meanwhile, softening effect is a by-product of our method. [ABSTRACT FROM AUTHOR]

The horizontal force friction of sliding-isolated bearing is variable when the vertical press change. So if the rubber bearings and the sliding-isolated bearings are used together in parallel in the same base-isolated layer, the characteristic of isolated layer is compex. In this paper the nonlinear finite element program which can analyze the vertical stress variation on sliding isolated bearing is made and introduced. One three-floor frame is analyzed as one example. The dynamical properties of base-isolation layer combined by rubber bearing and sliding-isolated bearing in parallel are anlyzed. The effects of overturning moment and vertical difference deformation on isolation layer are analyzed. The lateral displacement curves of the isolated layer top and the curves of vertical press changing on the sliding-isolated bearing are given on each condition. Analytical results show, that because of the vertical stress variation on sliding isolated bearing, the horizontal dynamic behavior of isolated layer is changed in such layer. This condition should be considered in design. [ABSTRACT FROM AUTHOR]