冰川荷载作用下地壳回弹问题的混合间断有限元OA

With the intensification of global warming,continuous melting of overlying glaciers leads to crustal rebound and results in the development of collapse and landslide disasters in the periglacial area.These disasters can further transform into more destructive geological hazard chains under the influence of precipita-tion.The biharmonic equation is often used to model the crustal rebound problem caused by glacier load.Nowadays,mainstream numerical methods are difficult to balance accuracy and complexity.To address this problem,a mixed discontinuous finite element method is adopted by introducing an intermediate variable to reduce the requirement of smoothness of finite element space for the biharmonic equation.In comparison with the traditional finite element methods,the selection of discontinuous Galerkin element has greater flexibility and can greatly simplify the complexity of numerical simulation,while maintaining high calculation accuracy.Furthermore,this study simulates the rebound of crust when the largest marine glacier in China,the Qiaqing Glacier,completely melts.Sensitivity analysis indicates that the thickness has a significant impact on the re-bound deformation and the Young's modulus of crust is relatively minor.The obtained results are expected to provide an important reference for the prediction and prevention of landslide disasters triggered by glacier melt.