In this paper, we firstly derive the stability conditions of high-order staggered-grid schemes for the three-dimensional (3D) elastic wave equation in heterogeneous media based on the energy method. Moreover, the plan...In this paper, we firstly derive the stability conditions of high-order staggered-grid schemes for the three-dimensional (3D) elastic wave equation in heterogeneous media based on the energy method. Moreover, the plane wave analysis yields a sufficient and necessary stability condition by the von Neumann criterion in homogeneous case. Numerical computations for 3D wave simulation with point source excitation are given.展开更多
This paper provides the stability analysis of blot-reinforced slopes using of 3D DDA(Discontinuous Deformation Analysis).Up to now,the 2D DDA has been developed maturely in theory and practice.However,the usage of 3D ...This paper provides the stability analysis of blot-reinforced slopes using of 3D DDA(Discontinuous Deformation Analysis).Up to now,the 2D DDA has been developed maturely in theory and practice.However,the usage of 3D DDA is rare according to literature review especially in practical 3D slopes.The function of bolt reinforcement has been fulfilled in the 2D DDA,while it has not been realized and applied in practical engineering in the 3D DDA.For the practical engineering problem,obviously,the 3D analysis is more accurate.Therefore,to fulfil the function of bolt reinforcement and application in practical engineering is still a problem for the 3D DDA.In this research,firstly,some basic theory about the 3D DDA method and the CRLD(Constant Resistance and Large Deformation)bolt model will be illustrated.Secondly,how to add the function of bolt reinforcement to the 3D DDA is illustrated,and then a simple test mode is used to test its accuracy.Lastly,a slope model is used as an example to verify its usage in engineering.In this paper,the process of adding bolt function in the 3D DDA is illustrated and the verification in slope is made,which benefits the future development of 3D DDA in landslide mitigation.展开更多
文摘In this paper, we firstly derive the stability conditions of high-order staggered-grid schemes for the three-dimensional (3D) elastic wave equation in heterogeneous media based on the energy method. Moreover, the plane wave analysis yields a sufficient and necessary stability condition by the von Neumann criterion in homogeneous case. Numerical computations for 3D wave simulation with point source excitation are given.
文摘This paper provides the stability analysis of blot-reinforced slopes using of 3D DDA(Discontinuous Deformation Analysis).Up to now,the 2D DDA has been developed maturely in theory and practice.However,the usage of 3D DDA is rare according to literature review especially in practical 3D slopes.The function of bolt reinforcement has been fulfilled in the 2D DDA,while it has not been realized and applied in practical engineering in the 3D DDA.For the practical engineering problem,obviously,the 3D analysis is more accurate.Therefore,to fulfil the function of bolt reinforcement and application in practical engineering is still a problem for the 3D DDA.In this research,firstly,some basic theory about the 3D DDA method and the CRLD(Constant Resistance and Large Deformation)bolt model will be illustrated.Secondly,how to add the function of bolt reinforcement to the 3D DDA is illustrated,and then a simple test mode is used to test its accuracy.Lastly,a slope model is used as an example to verify its usage in engineering.In this paper,the process of adding bolt function in the 3D DDA is illustrated and the verification in slope is made,which benefits the future development of 3D DDA in landslide mitigation.
