Numerical Simulation On Lateral-Displacements-Resisted Plate Rubber Support

Based on existent experiments, the influence of the fold gradient, fold length and groove depth of special-shaped steel plate on the capability of resisting lateral displacements of the support and the change of internal shear stress is studyed by numerical simulation. In view of the peeling intensity, the lateral-displacements- resisted plate rubber support is optimized and the reasonable structural dimension is gained. The main contents and innovative work include:(1) Based on existent experiments, the transverse and lognitudinal shear elastic modulus and press elastic modulus of usual and special-shaped plate rubber suppor is studyed by numerical simulation. The results of numerical simulation are in good agreement with experiments and can be used to the optimization of lateral- displacements-resisted plate rubber support. The variation of the structural form of steel stiffened panel can change the stress characteristic of rubber plate in the support from only shear stress to both shear and press, which increases the transverse shear elastic modulus and improves the capability of resisting lateral displacements of the support.(2) The transverse and lognitudinal shear stress of usual and special-shaped support is calculated. Because of the special structural form of steel stiffened panel, the internal stress of special-shaped support concentrates seriously and the maximal shear stress exceeds the critical value (10MPa) of the peeling intensity. As far as the permissive shear stress is concerned, the structural dimension of special-shaped support T1 and T2 is not eligible, so the lateral-displacements-resisted plate rubber support should be optimized.(3) Single factor and comprehensive analysis in the fold gradient, fold length and groove depth are taken. The results show that the increase of the gradient and groove depth is advantageous to the capability of resisting lateral displacements of the support, but it will also increase the maximal shear stress. When the maximal shear stress exceeds the critical value of the peeling intensity, it is disadvantageous to the security and wear of the support. The maximal shear stress decreases with the increase of groove depth, which is advantageous to the security and wear of the support. Compared with the gradient and groove depth, the fold gradient is less important to the capability of resisting lateral displacements and concentration of stress. Both the capability of resisting lateral displacements and the security and wear of the support by the optimization of the last three factors can be improved.