太原理工大学
- The most commonly used models for deformed blocks in UDEC are as follows:（ ）
- Commonly used retarders are（ ）
- The following statement about the mechanical strain gauge is incorrect （ ）
- The following similarity theory is （ ）.
- Physical similarity simulation determines the principles that similar materials need to follow（ ）
- The selection of orthogonal table mainly considers three aspects:（ ）
- The deformation characteristics of the block are defined by the following command（ ）
- UDEC has several commands for generating the geometry of the calculation model. The two main commands for generating geological structures (namely, joints) are as follows:（ ）
- Numerical simulation technology commonly used numerical calculation methods are mainly:（ ）
- UDEC/3DEC Application Field （ ）
- Three methods for simulation of load weight of Similar Material Model（ ）
- For an elastic model, the required properties are:（ ）
- At present, there are two types of numerical calculation methods that can be used in the study of rock fracture and rock strata movement:（ ）
- Which of the following falls under the physical similarity category （ ）
- The recommended steps for conducting successful numerical simulation tests are（ ）
- Which business program is not based on finite element method?（ ）
- Which of the following options should not be considered in the selection of resistance strain gauge? （ ）
- Which of the following is not the advantages of the finite element method?（ ）
- Numerical mechanical analysis has become a conventional means to solve complex engineering analysis problems.（ ）
- Which of the following is wrong about UDEC? （ ）
- The engineering structure shape is formed by cutting the UDEC block, which needs to be carried out before the excavation of the project. （ ） commands are typically used to generate shapes.
- reset disp；After the original equilibrium of the model, the displacement becomes （ ）.
- Consideration should be given to preserving the required （ ） state of the model during the calculation so that each parameter change does not have to be double-counted.
- The boundary element method is described incorrectly by （ ）.
- （ ） can more truly reflect the movement law of the overlying strata inside the stope, and accurately judge the stress characteristics of the stope support and the distribution law of the surrounding rock stress.
- The following statement about mechanical strain gauge is correct. （ ）
- The following analysis methods are incorrectly classified as （ ）.
- The ratio of the corresponding physical quantities of similar phenomena is called （ ）.
- To achieve the desired strength of similar materials in advance, （ ） can be used.
- The command Gen （ ） V is used to specify the model as a unit of the plastic material model.
- The （ ） code for horizontal and vertical stress curves is as follows.
- “segment” is the number of a group of prop whose default value is（ ）.
- The First Theorem of Similarity satisfies several conditions （ ）.
- prop mat j sup_kn -1；sup_kn refers to the bracket （ ）, -1 corresponds to Table 1.
- The element composition of PFC model (2D) contact property does not include .（ ）
- For deformed blocks, the maximum fillet length should not exceed 1% of the average edge length of the block.（ ）
- print pline 2 xdis [Record the vertical displacement of line 2] .（ ）
- The inhomogeneity of initial stress state space can't be simulated in jointed and fissured media.（ ）
- Critical block theory belongs to the method of nondeterministic analysis.（ ）
- Command Gen Edge V to apply to blocks of any shape. Its V value defines the maximum side length of the triangle cells, that is, the smaller the V value, the smaller the cell in the block.（ ）
- If the mechanical properties of rock mass are accurately grasped macroscopically and the in-situ stress field is grasped by in-situ stress testing, the results of numerical mechanics analysis are not reliable.（ ）
- The mining process of the model in the test can be understood as the process of moving the powered support at the working face and the process of coal caving.（ ）
- Numerical analysis methods mainly include analysis of certainty methods and analysis of uncertainty methods.（ ）
- At present, all strain gauges are designed and calibrated according to the standard of 120 resistance.（ ）
- According to the third theorem of similitude, we can point out the rules that must be obeyed in doing model experiments.（ ）
- Cons=0 means that the model block material is removed or excavated.（ ）
- The PFC damping coefficient is dimensionless.（ ）
- If the simulated prototype is composed of multiple layers of rock, the strength index of the simulated rock should be calculated layer by layer.（ ）
- Cohesion is not a dielectric condition.（ ）
- The property parameters required for the numerical calculation are determined by the constitutive relation of block and knots.（ ）
A:cons=1 ; elastic model change B:cons=3 ; Mohr-coulomb model C:cons=3；jtension model D:change cons=0; null model change change
答案:cons=1 ; elastic model change###cons=3 ; Mohr-coulomb model###change cons=0; null model change change
A:borax B:gelatine C:asphalt D:sodium phosphate
答案:borax###gelatine###sodium phosphate
A:Need the power supply B:There is no guide plate C:Need arrange the measuring points D:can read it directly
答案:A, B, D
A:Physical similarity theorem B:Geometric similarity theorem C:the second similarity theorem D:The First Theorem of Similarity
答案:A, B, C, D
A:When the ratio of mixed materials is changed, its mechanical properties can be greatly changed B:The mechanical properties of the material are stable and not easily affected by environmental changes C:When the similar materials are selected, the main physical and mechanical properties of the corresponding parts of the model and prototype should be similar D:Materials should be easy to obtain, easy to manufacture, easy to lay
答案:When the ratio of mixed materials is changed, its mechanical properties can be greatly changed.###The mechanical properties of the material are stable and not easily affected by environmental changes.###When the similar materials are selected, the main physical and mechanical properties of the corresponding parts of the model and prototype should be similar.###Materials should be easy to obtain, easy to manufacture, easy to lay.
A:the number of times of each batch of tests B:the factors examined and the number of bit levels of each factor C:whether there are key factors D:Orthogonal table format
答案:the factors examined and the number of bit levels of each factor###whether there are key factors###the number of times of each batch of tests
A:Plot zone B:gen edad v C:gen edge v D:gen quad v
答案:gen edge v###gen quad v
A:log B:jset C:block D:crack
答案:B: jset
A:The boundary element method B:The finite element method C:Finite difference method D:The rigid body element method
答案:The boundary element method###The rigid body element method###Finite difference method###The finite element method
A:Earthquake engineering B:The geotechnical engineering C:Military engineering D:Agriculture, forestry and engineering
A:Applying surface force to simulate self weight B:Add water to simulate dead weight C:Using the weight of equivalent material itself to simulate self weight D:Exerting physical force to simulate self weight
A:Modulus of elasticity B:density C:bulk modulus D:Shear modulus
A:Analysis method for viscous media B:Numerical calculation method based on continuum mechanics C:Numerical calculation method based on semicontinuous medium mechanics D:Methods for mechanical analysis of discontinuous media
A:Bulk density B:area C:volume D:time
A:Perform model calculations B:Present the results for interpretation C:Create a conceptual graph of the physical model system D:Collect data for specific problems
A:SAP B:ANSYS C:ADINA D:UDEC
A:Hardness of material B:Long-term observation or short-term measurement C:Static or dynamic load D:Measure the working condition of the object
A:Good at handling rigid and flexible contact problems B:It can be meshed directly on the mechanical model C:has good adaptability D:the physical concept is clear and easy to understand
A:To study the internal mechanics mechanism of engineering problems B:Reduce engineering and product costs C:Increased engineering and product reliability D:Find a certain reliable construction scheme
A:Blocks in UDEC can be rigid B:The UDEC calculation preparation process is complex C:UDEC can be used in military activities D:Blocks in UDEC can be deformable
A:four B:two C:three D:One
A:4 B:6 C:0 D:2
A:The initial B:On average C:The end of D:In the middle
A:The boundary element method is called SPH B:more accurate and efficient than the finite element method C:The basic idea is based on Green's theorem D:especially convenient to deal with the problems of infinite and semi-infinite fields.
A:Three-dimensional model frame Plane B:Swivel model frame C:Stress model frame D:Plane strain model frame
A:Need the power supply B:can read it directly C:There is no guide plate D:Need arrange the measuring points
A:Finite difference method is continuum analysis method B:Time series analysis is a nondeterministic method C:Discontinuous deformation analysis is a nondeterministic method D:Discrete element method is a discontinuous medium analysis method
A:similarity constants B:the similarity criterion C:similarity index D:Similarity criterion
A:water B:casein C:accelerator D:retarder
A:qund B:qued C:quad D:qaad
A:lag B:lug C:lae D:log
A:4 B:5 C:2 D:3
A:1 B:2 C:4 D:3
A:material properties B:stiffness C:Cross-sectional area D:width
A:Bond type B:Displacement increment C:Coulomb slider D:Linear springs
A:对 B:错
A:错 B:对
A:对 B:错
A:对 B:错
A:对 B:错
A:对 B:错
A:对 B:错
A:错 B:对
A:对 B:错
A:错 B:对
A:对 B:错
A:对 B:错
A:错 B:对
A:错 B:对
A:对 B:错
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