CN105653786A - Internal force calculation method capable of considering shear deformation and rigid node of sealed frame - Google Patents
Internal force calculation method capable of considering shear deformation and rigid node of sealed frame Download PDFInfo
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- CN105653786A CN105653786A CN201511015997.9A CN201511015997A CN105653786A CN 105653786 A CN105653786 A CN 105653786A CN 201511015997 A CN201511015997 A CN 201511015997A CN 105653786 A CN105653786 A CN 105653786A
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Abstract
The invention provides an internal force calculation method capable of considering the shear deformation and the rigid node of a sealed frame. The internal force calculation method comprises the following steps: 1) determining a structure; 2) determining a calculation schematic diagram; 3) determining a calculation model; 4) restricting the degree of freedom of the model; 5) constraining sidesway; 6) determining a shear rigidity coefficient; 7) regulating a calculation model; and 8) carrying out structure calculation analysis. The calculation result accuracy of the internal force calculation method meets code requirements, a purpose of quickness and accuracy is achieved, meanwhile, the advantages of the powerful functions and the convenience in operation of a structural mechanics solver are fully utilized, and therefore, the internal force calculation method has the advantages of being high in calculation result confidence level and convenient in popularization and application.
Description
Technical field
The present invention relates to a kind of internal force of considering closed frame detrusion and rigid joint calculatesMethod, belongs to Hydraulic and Hydro-Power Engineering technical field.
Background technology
According to China's hydropower industry current specifications requirement, for powerhouse of hydropower station spiral case, draft tube,Cross flow set tubular seat, power house in river channel inducer, the factory building such as wall pier and sole plate under waterBottom entity structure, can cut plane framework by absolute construction and calculate, for large-sized workshopShould consider space behavior, carry out if desired the structural analysis of factory building entirety three-dimensional finite element.
When plane frame method calculates, according to the relative rigidity that cuts position rod member, when top rod memberWhen relative rigidity and base plate relative rigidity approach, calculate by closed frame. Closed frame by base plate,Top board and some dividing piers composition, be reduced to structure and basic being connected to prop up than general frameworkSeat is different, and closed frame comprises sole plate, and its essence is the framework on elastic foundation. EnvelopeClose framework and ground Continuous Contact, being equivalent to has infinite multiple bearing between base plate and ground,Closed frame is infinite multiple indeterminate structure. In engineering reality, generally ignore at present base plate and groundThe Continuous Contact relation of base, is directly applied to subgrade reaction on closed frame base plate, by infiniteMultiple indeterminate structure is converted to limited number of time redundant structure, calculates thereby simplify.
When plane frame method calculates, rod member computational length is as the criterion with structure centre line, when rod member cutsFace thickness is larger, and rise-span ratio h/l is greater than 0.15, needs to consider the impact of detrusion and rigid joint,To improve computational accuracy.
Detrusion refer to when rod member have in two adjacent cross-section a pair of perpendicular to bar axle, butWhen the Lateral Force of opposite direction, there is the relative changing of the relative positions along cross force direction and become in this two sectionsShape. Detrusion is to cause one of factor of rod member elastic displacement, the displacement that detrusion causesComputing formula is:
In formula: ΔQ---the structural elasticity displacement that detrusion causes, m;
---the shearing that illusory unit load causes, kN;
FQP---the shearing that actual loading causes, kN;
The shear stiffness of GA---bar cross section, kN;
K---shear strain cross section shape coefficient, as square-section k=6/5.
For general framework structure, its displacement mainly causes by flexural deformation, axially and cutThe impact of shear deformation is very little, for simplified structure calculates general negligible axial and detrusion. But rightIn thick section frame, the proportion that the distortion that shearing causes accounts for structure total deformation is larger, for meeting meterCalculate required precision, should consider the impact of detrusion.
The place that is rigidly connected between frame member, in fact always forms a land. WhenHour, land can be reduced to a point to the size of land, what Here it is " node "Concept. But in the time that land size is larger, should consider the impact of land size. A kind of nearLike consideration method be that rigid region is regarded as in land, each Rod end is entered to one of landSection is regarded rigid section as. In hydropower industry, this Rod end being entered to a section of land regards as justThe method of property section is referred to as rigid joint. Rigid section has and does not deform under external forceAbility, in rigid section, bar cross section is assumed to be infinity, bending rigidity EI, extensional rigidity EAAnd shear stiffness GA is infinity.
At present, hydropower industry is considered the internal force meter of closed frame detrusion and rigid joint impactCalculation method mainly contains method of structural mechanics and FInite Element. While adopting method of structural mechanics to calculate, ignoreRod member axial deformation, ignores the impact of framework sidesway, ignores the Continuous Contact relation of base plate and ground,Directly subgrade reaction is applied on closed frame base plate, then by Involving Transverse Shear Deformation and rigidityThe formula of node impact, calculates rod member shape constant and carries constant, then presses moment distribution method artificialHand computation structural internal force. FInite Element adopts finite element analysis software, automatically complete under manual interventionBecome Structure Calculation. Two kinds of methods respectively have quality: traditional structure Mechanical Method adopts artificial hand computation, meterNumerous and diverse, simply repeat many, efficiency is low, error rate is high, but structuring concept is clear and definite, engineering is realTrample experiencedly, result of calculation has obtained numerous engineering verifications. FInite Element computer is auxiliaryHelp design means, workload is little, and computational process error rate is low, but computing grid subdivision randomnessMore intense, human factor impact is larger, the construction unit difference of selection, and the result of calculating is not yetWith, and stress result has size of mesh opening effect, and engineering experience is less, and reliability needsChecking. Therefore, current specifications still recommend adoption method of structural mechanics is main, must for heavy constructionWill time carry out overall three-dimensional finite element structural analysis and check.
Publication number be the Chinese patent of CN103970519A disclose one make PKPM program byThe method of water power Specification Design hydroelectric project frame structure, this patent is soft by self-defined PKPMSATWE module " self-defined combination and the operating mode " table of part, realizes conventional water conservancy project upper frame knotStructure designs by water power specification. PKPM software PK module can realize plane frame structure and calculate,But this module does not have the function of considering detrusion and rigid joint. Therefore, can not adoptPKPM software considers that the planar surface encloses framework of detrusion and rigid joint calculates.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of closed frame detrusion of consideringWith the Calculation Methods for Internal Force of rigid joint, this consideration closed frame detrusion and rigid jointCalculation Methods for Internal Force computational solution precision meets code requirement, and has reached fast order accurately, make full use of the powerful, easy to operate of structural mechanics solver simultaneously, make to calculate knotFruit is with a high credibility, is easy to be extended and applied.
The present invention is achieved by the following technical programs.
A kind of internal force meter of considering closed frame detrusion and rigid joint provided by the inventionCalculation method; Comprise the steps:
1. determine structure: according to the general principle of plane frame method, factory building bottom entity structure is dividedDistrict cuts single wide plane framework, according to the relative rigidity that cuts position rod member, when top rod member phaseWhen rigidity and base plate relative rigidity are differed to less than 10%, calculate by closed frame;
2. determine calculation diagram: frame member computational length is as the criterion with structure centre line; According to heightAcross than judgement, for the rod member that need to consider detrusion and rigid joint, each boom end is enteredEnter one section of frame member land as rod member rigid section, the part beyond rod member land is doneFor rod member compliant section, thereby determine closed frame calculation diagram;
3. determine computation model: from " node definition ", " unit definition ", " bearing definition " and" loading condition " four aspects are in conjunction with frame construction drawing is reduced to Structure Calculation model;
4. the limited model free degree: in analyzing according to structural mechanics geometrical construction, two tablets connect rule, all regard ground and closed frame as tablet, be connected with a chain bar by a hinge, and chainBar and extended line thereof be by hinge, and composition how much is constant and without the system of superfluous constraint;
5. retrain sidesway: in framework computation model, there is the position of sidesway, addition link fulcrum is setConstraint framework sidesway, makes computation model become frame without sidesway;
6. determine shear stiffness coefficient: obtain shear strain cross section shape coefficient k0, determine and get shearing resistanceStiffness coefficient k=1/k0;
7. adjust computation model: the addition link fulcrum that any anti-sidesway is set in Structure Calculation modelSo that Structure Calculation model is revised, and to " anti-in " material character " in Structure Calculation modelDraw rigidity EA ", " bending rigidity EI " and " shear stiffness kGA " adjust, for rigiditySection, by " extensional rigidity EA ", " bending rigidity EI " and " shear stiffness kGA " three parametersAll be adjusted into infinity, for compliant section, " extensional rigidity EA " is adjusted into infinity, " bending resistanceRigidity EI " and " shear stiffness kGA " get rod member practical stiffness value;
8. Calculation Anaysis for Tunnel Structure: the Structure Calculation model of determining and revising according to above-mentioned steps, profitCarrying out internal force or displacement with structural mechanics solver calculates.
The structural mechanics solver of described step in 8., for the professor of Yuan team of four horses of Tsing-Hua University presides over research and developmentStructural mechanics computer-assisted analysis software for calculation StructuralMechanicsSolver.
Described step is reduced to Structure Calculation model by frame construction drawing in 3. and passes through structural mechanicsSolver completes.
Beneficial effect of the present invention is: computational solution precision meets code requirement, and has reachedFast object accurately makes full use of powerful, the operation side of structural mechanics solver simultaneouslyJust, make result of calculation with a high credibility, be easy to be extended and applied.
Brief description of the drawings
Fig. 1 is the closed frame structural representation 1. of step of the first embodiment of the present invention;
Fig. 2 is that the closed frame that the step of the first embodiment of the present invention is simplified in is 2. calculatedSketch;
Fig. 3 be the first embodiment of the present invention step 3., step 4., step 5. and step7. the closed frame computation model that is provided with additional hinged-support, annex chain bar and adjust after rigidity showsIntention.
In figure: 1-chassis base, 2-frame head plate, 3-framework left side pier, pier in 4-framework,5-framework the right pier, 6-frame member node, 7-rod member rigid section, 8-rod member compliant section, 9-Additional fixed-hinged support, 10-additional active hinged-support, 11-addition link fulcrum.
Detailed description of the invention
Further describe technical scheme of the present invention below, but claimed scope is not limited toIn described.
Calculate for the internal force of considering closed frame detrusion and rigid joint, existing water power is capableThe main distinction of industry specification recommends method and structural mechanics solver is: the 1. knot of specification recommendsStructure mechanics moment distribution method, mainly adopts artificial hand computation, and its calculation procedure mainly comprises to be considered to cutThe shape constant of distortion and rigid joint and year constant calculations, distribution coefficient and carry-over factor calculating,Distribution and the transmission of fixing calculation of Bending Moment and node unbalanced moment, and structural mechanics solverAs computer aided calculation software, its calculation procedure comprises that setting up Structure Calculation model (comprisesNode definition, unit definition, bearing definition, loading condition, material character) and structural analysisCalculate (comprising geometry composition, internal force calculating, displacement calculating etc.) two steps; 2. specification recommendsStructural mechanics moment distribution method, ignores the Continuous Contact relation of base plate and ground, directly by groundCounter-force is applied on closed frame base plate, though closed frame meets static balance condition, it isHave 3 free degree geometrically unstable systems, moment distribution method is not considered how much composition structures of structureMake; And mechanics solver cannot carry out internal force calculating for geometrically unstable system; 3. specification recommendsStructural mechanics moment distribution method, do not consider framework sidesway and rod member axial deformation, and structural capacityLearn the exact algorithm of solver as planar structure, axial deformation and framework sidesway are all in its considerationScope and so on; 4. in the structural mechanics moment distribution method of specification recommends, rod member shear stiffness is GA;And structural mechanics solver shear stiffness is kGA.
In order to address the above problem, the invention provides a kind of consider closed frame detrusion andThe Calculation Methods for Internal Force of rigid joint, comprises the steps:
1. determine computation structure: according to the general principle of plane frame method, factory building bottom entity is tiedStructure subregion cuts single wide plane framework, according to the relative rigidity that cuts position rod member, works as upper barWhen part relative rigidity and base plate relative rigidity approach, calculate by closed frame.
2. determine calculation diagram: frame member computational length is as the criterion with structure centre line; According to heightAcross than judgement, for the rod member that need to consider detrusion and rigid joint, each boom end is enteredEnter one section of frame member land as rod member rigid section, the part beyond rod member land is doneFor rod member compliant section, thereby determine closed frame calculation diagram.
3. determine computation model: utilize " knot in structural mechanics solver according to Analytic Models For StructuresPoint definition ", " unit definition ", " bearing definition " and " loading condition " page be Structure CalculationSketch input structure mechanics solver, generates software computation model.
4. the limited model free degree: closed frame is made up of base plate, top board and some dividing piers, phaseMore different than structure and basic connection being reduced to bearing in general framework, closed frame comprisesSole plate, its essence is the framework on elastic foundation. Closed frame and ground Continuous Contact,Being equivalent to has infinite multiple bearing between base plate and ground, and closed frame is infinite repeatedly super quietFixed structure. Tradition closed frame is not considered the bearing relation of base plate and ground, directly handle in calculatingSubgrade reaction applies on large closed frame base plate, in then being undertaken by moment distribution method or chain bar methodPower is calculated. But without the closed frame of bearing for thering are 3 free degree geometrically unstable systems, cannotUtilize structural mechanics solver to carry out internal force calculating. Need to increase constrained closed frame for this reasonThe free degree, is built into geometrically stable system. Increase after constraint, in structure for ensureing simultaneouslyPower constant (being that degree of statical indeterminacy is constant), the constraint increasing is necessary for non-superfluous constraint. RootTwo tablet concatenate rules in analyzing according to structural mechanics geometrical construction, all see ground and closed frameMake tablet, be connected with a chain bar by a hinge, and chain bar and extended line thereof are by hinge,Composition how much is constant and without the system of superfluous constraint.
5. restricted model sidesway: the position in framework computation model with sidesway (has line positionThe node moving), addition link fulcrum constraint framework sidesway is set, computation model is become without sidesway frameFrame, thus meet structural mechanics moment distribution method and do not consider the hypothesis of framework sidesway.
6. determine shear stiffness coefficient: structural mechanics solver software and dependent help file thereof are alsoDo not provide the coefficient k value explanation in shear stiffness, by theory analysis and case verification, anti-Cutting stiffness coefficient k is shear strain cross section shape coefficient k0Inverse, i.e. k=1/k0。
7. adjustment model rigidity: " tension in structural mechanics solver " material character " pageRigidity EA ", parameter box input rod member rigidity in " bending rigidity EI " and " shear stiffness kGA ".According to considering framework detrusion and rigid joint internal force Computing Principle, rigid section has in external forceThe ability not deforming under effect, in rigid section, bar cross section is assumed to be infinity, will be " anti-Draw rigidity EA ", " bending rigidity EI " two parameters are set to infinity, by " shear stiffness kGA "Be set to " not considering detrusion " and be equivalent to shear stiffness infinity; Compliant section is considered to cutShear deformation and flexural deformation, negligible axial distortion, is adjusted into infinity by " extensional rigidity EA "," bending rigidity EI " and " shear stiffness kGA " presses the input of rod member practical stiffness value.
8. structural internal force calculation: determine and revise closed frame computation model according to above-mentioned steps,The internal force computing function of utilizing structural mechanics solver, can realize based on structural mechanics solverThe detrusion of consideration framework and the internal force of rigid joint calculate target.
The structural mechanics solver of described step in 8., for the professor of Yuan team of four horses of Tsing-Hua University presides over research and developmentStructural mechanics computer-assisted analysis software for calculation StructuralMechanicsSolver.
Described step is converted into computation model by closed frame calculation diagram in 3. and passes through structural capacitySolver completes.
Structural mechanics solver StructuralMechanicsSolver, being called for short SMSolver is clearlyThe Hua Da Xue Yuan professor of a team of four horses presides over the structural mechanics computer-assisted analysis software for calculation of research and development, and it is askedSeparate how much compositions that content comprised two-dimension plane structure system, static determinacy, indeterminate, displacement,Internal force, affect the classical architecture such as line, envelope diagram, free vibration, elastic stability, ultimate loadRelated series of problems in mechanics, all adopts exact algorithm to provide accurate answer. StructureMechanics solver adopts matrix displacement method to carry out accurate Calculation, result of calculation to plane frame structureReliable and efficient and convenient. But frame structure internal force algorithm---the matrix displacement method of solver, withMoment in classical architecture mechanics is distributed and addition link fulcrum method exists larger difference, ignores the end simultaneouslyAfter the Continuous Contact of plate and ground is infinite multiple indeterminate relation, closed frame is for having 3Free degree geometrically unstable system, cannot utilize structural mechanics solver to carry out internal force calculating. Therefore,Structural mechanics solver can not be directly used in and calculate the plane of considering detrusion and rigid jointClosed frame.
Embodiment 1
For closed frame structure as shown in Figure 1, by chassis base 1, frame head plate 2, framePier 4 in frame left side pier 3, framework, framework the right pier 5, frame member node 6 form, adopt asLower step is carried out internal force calculating:
1. determine computation structure: according to the general principle of plane frame method, factory building bottom entity is tiedStructure subregion cuts single wide plane framework, because top rod member relative rigidity and base plate relative rigidity connectClosely, therefore calculate by closed frame. Form closed frame structure as shown in Figure 1, closed frameBy pier 4, framework the right pier 5 in chassis base 1, frame head plate 2, framework left side pier 3, frameworkForm with frame member node 6.
2. determine calculation diagram: frame structure center line is as the criterion and determines rod member computational length; According toThe judgement of rod member rise-span ratio, for the rod member that need to consider detrusion and rigid joint, by each barEnd enters a section of frame member land as rod member rigid section 7, beyond rod member landPart as rod member compliant section 8. Thus closed frame structure chart is as shown in Figure 1 reduced toClosed frame calculation diagram as shown in Figure 2.
3. determine computation model: utilize " knot in structural mechanics solver according to Analytic Models For StructuresPoint definition ", " unit definition ", " bearing definition " and " loading condition " page be closed frameCalculation diagram input structure mechanics solver, generates software computation model.
4. the limited model free degree: as shown in Figure 2, without the closed frame of bearing for have 3 fromBy degree geometrically unstable system, cannot utilize structural mechanics solver to carry out internal force calculating. Needing increasesThe free degree of constrained closed frame, is built into geometrically stable system. Simultaneously for ensureingIncrease after constraint, structural internal force constant (being that degree of statical indeterminacy is constant), the constraint increasing mustMust be non-superfluous constraint. Two tablet concatenate rules in analyzing according to structural mechanics geometrical construction, willGround and closed frame are all regarded tablet as, be connected with a chain bar by a hinge, and chain bar andExtended line is by hinge, and composition how much is constant and without the system of superfluous constraint. According to above-mentioned former, as shown in Figure 3, in Structure Calculation model, at least one frame member node 6 arranges arbitrarilyAn additional fixed-hinged support 9, in addition arbitrarily at least one does not arrange additional fixing hingedAdditional active hinged-support 10 of Node configuration of seat.
5. restricted model sidesway: the closed frame 4. arranging after additional support seat by step has jointPoint displacement of the lines, belongs to frame with sidesway. For not considering framework sidesway with structural mechanics moment distribution methodHypothesis consistent, in computation model, there is framework sidesway place (thering is the node of displacement of the lines),Addition link fulcrum constraint framework sidesway is set. As shown in Figure 3, there is line position at Structure Calculation modelThe Node configuration addition link fulcrum 11 moving retrains framework sidesway, thereby computation model is become without sideswayClosed frame.
6. determine shear stiffness coefficient: structural mechanics solver software and dependent help file thereof are alsoDo not provide the coefficient k value explanation in shear stiffness, by theory analysis and case verification, anti-Cutting stiffness coefficient k is shear strain cross section shape coefficient k0Inverse, i.e. k=1/k0。
7. adjustment model rigidity: " tension in structural mechanics solver " material character " pageRigidity EA ", parameter box input rod member rigidity in " bending rigidity EI " and " shear stiffness kGA ".According to considering framework detrusion and rigid joint internal force Computing Principle, rigid section has in external forceThe ability not deforming under effect, in rigid section, bar cross section is assumed to be infinity, will be " anti-Draw rigidity EA ", " bending rigidity EI " two parameters are set to infinity, by " shear stiffness kGA "Be set to " not considering detrusion " and be equivalent to shear stiffness infinity; Compliant section is considered to cutShear deformation and flexural deformation, negligible axial distortion, is adjusted into infinity by " extensional rigidity EA "," bending rigidity EI " and " shear stiffness kGA " presses the input of rod member practical stiffness value.
8. structural internal force calculation: the Structure Calculation model of determining and revising according to above-mentioned steps, profitCarry out internal force calculating with structural mechanics solver, can realize examining based on structural mechanics solverThe internal force of considering closed frame detrusion and rigid joint calculates target.
The present invention is by structural mechanics solver computation model, arrange additional fixed-hinged support andThe additional active hinged-support limited model free degree, member geometrically stable system; Addition link fulcrum is setConstraint framework sidesway; Adjust relevant stiffness parameters and consider the impact of detrusion and rigid joint.Thereby the structural mechanics moment of its software result of calculation and existing hydropower industry specification recommends is dividedJoining the consistent and computational efficiency of the result of calculation of method significantly promotes. Through case verification, by above-mentioned sideThe moment distribution method of method revised structural mechanics solver result of calculation and specification recommends calculatesResultant error is in 0.5%, and the error of calculation is mainly the square adopting due to structural mechanics solverBattle array displacement belongs to rigorous method, and moment distribution method belongs to progressive computing method, inferior along with distributingIncreasing of number, error will level off to 0; Computational efficiency improves more than 5 times simultaneously, and along with frameworkThe increase of the number of plies and span, computational efficiency is in rising trend.
Claims (3)
1. consider a Calculation Methods for Internal Force for closed frame detrusion and rigid joint, itsBe characterised in that: comprise the steps:
1. determine structure: according to the general principle of plane frame method, factory building bottom entity structure is dividedDistrict cuts single wide plane framework, according to the relative rigidity that cuts position rod member, when top rod member phaseWhen rigidity and base plate relative rigidity are differed to less than 10%, calculate by closed frame;
2. determine calculation diagram: frame member computational length is as the criterion with structure centre line; According to heightAcross than judgement, for the rod member that need to consider detrusion and rigid joint, each boom end is enteredEnter one section of frame member land as rod member rigid section, the part beyond rod member land is doneFor rod member compliant section, thereby determine closed frame calculation diagram;
3. determine computation model: from " node definition ", " unit definition ", " bearing definition " and" loading condition " four aspects are in conjunction with frame construction drawing is reduced to Structure Calculation model;
4. the limited model free degree: in analyzing according to structural mechanics geometrical construction, two tablets connect rule, all regard ground and closed frame as tablet, be connected with a chain bar by a hinge, and chainBar and extended line thereof be by hinge, and composition how much is constant and without the system of superfluous constraint;
5. retrain sidesway: in framework computation model, there is the position of sidesway, addition link fulcrum is setConstraint framework sidesway, makes computation model become frame without sidesway;
6. determine shear stiffness coefficient: obtain shear strain cross section shape coefficient k0, determine and get shearing resistanceStiffness coefficient k=1/k0；
7. adjust computation model: the addition link fulcrum that any anti-sidesway is set in Structure Calculation modelSo that Structure Calculation model is revised, and to " anti-in " material character " in Structure Calculation modelDraw rigidity EA ", " bending rigidity EI " and " shear stiffness kGA " adjust, for rigiditySection, by " extensional rigidity EA ", " bending rigidity EI " and " shear stiffness kGA " three parametersAll be adjusted into infinity, for compliant section, " extensional rigidity EA " is adjusted into infinity, " bending resistanceRigidity EI " and " shear stiffness kGA " get rod member practical stiffness value;
8. Calculation Anaysis for Tunnel Structure: the Structure Calculation model of determining and revising according to above-mentioned steps, profitCarrying out internal force or displacement with structural mechanics solver calculates.
2. the internal force of consideration closed frame as claimed in claim 1 detrusion and rigid jointComputational methods, is characterized in that: the structural mechanics solver of described step in 8., for Tsing-Hua University largeThe professor of a Xue Yuan team of four horses presides over the structural mechanics computer-assisted analysis software for calculation Structural of research and developmentMechanicsSolver。
3. the internal force of consideration closed frame as claimed in claim 1 detrusion and rigid jointComputational methods, is characterized in that: described step is reduced to Structure Calculation by frame construction drawing in 3.Model completes by structural mechanics solver.
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| CN107832480A (en) * | 2017-06-13 | 2018-03-23 | 中国电建集团贵阳勘测设计研究院有限公司 | The computational methods of framework on a kind of elastic foundation |
| CN107832480B (en) * | 2017-06-13 | 2022-09-23 | 中国电建集团贵阳勘测设计研究院有限公司 | Calculation method of upper frame of elastic foundation |
| CN110288881A (en) * | 2019-05-28 | 2019-09-27 | 上海交通大学 | A kind of modular construction mechanics experiment platform system |
| CN110517547A (en) * | 2019-08-23 | 2019-11-29 | 重庆大学 | Mechanics intelligent analysis system based on human-computer interaction |
| CN111027247A (en) * | 2019-12-09 | 2020-04-17 | 江南大学 | Stepwise incremental dynamic analysis and data processing method based on OpenSees and MATLAB |
| CN111027247B (en) * | 2019-12-09 | 2021-07-27 | 江南大学 | Stepwise incremental dynamic analysis and data processing method based on OpenSees and MATLAB |
| CN114429725A (en) * | 2021-12-30 | 2022-05-03 | 河海大学 | Universal node and assembled structure mechanical deformation demonstration teaching aid |
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