Rock Strata Control Simulation Technology答案2023秋

第八章测试

1.Since the necessary information input for design prediction is limited, geotechnical numerical models are mainly used to explain the mechanical mechanisms affecting the system characteristics and to perform simple exploratory calculations for engineering design.（ ）
A:对 B:错
答案:A
2.Once block cutting is completed, material properties must be assigned to all blocks and discontinuities.（ ）
A:对 B:错 3.Boundary forces and stresses can be applied to the boundaries of rigid and deformable bodies, but velocity (displacement) boundaries apply only to rigid.（ ）
A:错 B:对 4.It is very easy to determine whether the stress state formed in the joint model represents the initial state. （ ）
A:对 B:错 5.The basic commands for cutting blocks are missing（ ）.
A:CRACK B:ROUND C:JSET D:ARC 6.The system unit of Density is（ ）.
A:kg/m³ B:N C:Pa D:m/sec² 7.The more () the fillet length is, the more () the initial unbalance force is.（ ）.
A:Small, small B:Big, big C:Small, big D:Big, small 8.( ) Change the block to isotropic elastic characteristics; ( ) changes the block to moore-Coulomb model and considers the plastic properties.（ ）.
A:Cons=0 Cons=1 B:Cons=1 Cons=0 C:Cons=1 Cons=3 D:Cons=0 Cons=3 9.The most efficient plastic model is（ ）.
A:Strain softening/hardening M-C model B:Double yield model C:M - C model D:D - P model 10.In which case UDEC will take a long time to converge:（ ）.
A:There is a big difference in block or unit size. B:There is little contrast between the stiffness or properties of block material and jointed material C:There is a small difference in block or cell size D:The rigidities or properties of the block material and the joint material are quite different