CN110348110A - A kind of bolt connected piece rigidity adaptive recognition methods - Google Patents
A kind of bolt connected piece rigidity adaptive recognition methods Download PDFInfo
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- CN110348110A CN110348110A CN201910610944.3A CN201910610944A CN110348110A CN 110348110 A CN110348110 A CN 110348110A CN 201910610944 A CN201910610944 A CN 201910610944A CN 110348110 A CN110348110 A CN 110348110A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/06—Power analysis or power optimisation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The invention discloses a kind of bolt connected piece rigidity adaptive recognition methods, which comprises the following steps: 1) inputs parameter and determine: determining geometric dimension and material parameter, determine load parameter；2) bolted system simulation analysis model is established: being established geometrical model, is established grid model, establishes simulation analysis model；3) bolt axial direction Rigidity Calculation；4) outer load acts on lower connected piece residual clamping force and extracts: applying bolt initial pretightening force, applies external applied load, extracts connected piece residual clamping force；5) connected piece axial rigidity calculates.Quick, the accurate calculating of connected piece rigidity and self-adapting estimation under different bolt fastening structures and carrying form may be implemented in the present invention, key index reference can be provided for engineers and technicians' quick predict assembly connection performance, can also be bolt fastening structure optimization design based theoretical.
Description
[technical field]
The invention belongs to intelligence manufacture fields, are related to a kind of bolt connected piece rigidity adaptive recognition methods.
[background technique]
Be bolted because its structure is simple, convenient disassembly and is easily obtained larger prefastening load, be widely used in nuclear power,
Among the large complicated mechanical system in the fields such as military project, aerospace.Bolt connected piece rigidity directly affects connection system
Mechanical characteristic is to be bolted one of key index of Performance Evaluation.
In order to accurately calculate bolt connected piece rigidity, domestic and foreign scholars have carried out a lot of research work, main method packet
Include theoretical calculation, FInite Element and experimental test method.In terms of theoretical calculation, by the axially distributed simplification of connected piece compression
For shapes such as hollow cylinder, cone and spheres, and assume that the distribution of the compressive stress of the every bearing course of compressive region is uniformly distributed or is diameter
To four relational expressions of coordinate, the analytic expression of connected piece rigidity is derived with this；In terms of FInite Element, bolt company is constructed
Detailed finite element model is connect, by extracting maximum bolt head contact surface normal direction, minimum and average deflection, utilizes Hooke's law
Calculate connected piece axial rigidity；In terms of experimental test, connected piece part under amesdial measurement prefastening load is mainly utilized
Deformation, or be distributed using pressure film detection connected piece combination surface contact pressure, and then reverse goes out connected piece rigidity.
As can be seen that scholars have carried out a large amount of fruitful research work in terms of connected piece Rigidity Calculation,
However there is also many yet unresolved issues.First is that there are a large amount of assumed conditions, different structure shapes for existing theoretical calculation method
Formula and carrying condition can all cause the inaccuracy of connected piece Rigidity Calculation；Second is that existing finite element method is limited to deflection
Being not fixed for position is extracted, connected piece overall stiffness characteristic can not be really described；Third is that between testing method belongs at present
Measurement method is connect, error is larger, and with high costs, is unable to satisfy engineering popularization and application.Therefore, there is an urgent need to develop a kind of considerations
True bolt fastening structure and carrying form, are eliminated since deformation position chooses the measurement error introduced, and can be quick and precisely
Calculate the new method of bolt connected piece overall stiffness.
[summary of the invention]
It is an object of the invention to overcome the above-mentioned prior art, a kind of bolt connected piece rigidity adaptive is provided
Recognition methods, this method are analyzed and are bolted under outer load effect by establishing the bolt fastening structure finite element model refined
The variation of clamping force, and by material Coordinate deformation equation, it constructs initial pretightening force, residual clamping force, bolt rigidity and is connected
Correlation model between fitting rigidity realizes that bolt is connected under different bolt fastening structures and carrying form based on this
The quick and precisely calculating of part rigidity and self-adapting estimation.
In order to achieve the above objectives, the present invention is achieved by the following scheme:
A kind of bolt connected piece rigidity adaptive recognition methods, comprising the following steps:
Step 1: determining input parameter；
Step 2: establishing bolted system simulation analysis model；
Step 3: calculating bolt axial rigidity；
Step 4: extracting outer load and act on lower connected piece residual clamping force；
Step 5: calculating connected piece axial rigidity.
The present invention further improves as follows:
The specific method is as follows for the step 1:
Step 1-1: geometric dimension and material parameter are determined: determines connected piece, the geometric dimension of bolt and material properties
Parameter；
Step 1-2: it determines load parameter: determining initial bolt pretightening load and external application load.
The specific method is as follows for the step 2:
Step 2-1: establish bolted system geometrical model: it is right to establish bolted system two dimension using finite element software
Claim geometrical model；
Step 2-2: bolted system grid model is established: by material properties setting, grid dividing and preload unit
It divides, establishes bolted system two-dimensional symmetric grid model；
Step 2-3: it establishes bolted system simulation analysis model: contact function is set between crucial faying face, wrap
Include contact surface between bolt head and connected piece contact surface, connected piece, connected piece and nut contact surface, nut thread and spiral shell
Displacement constraint is arranged in lower connected piece lower surface in the bolt screw thread field of conjugate action, to establish the emulation of bolted system two-dimensional symmetric
Analysis model.
The specific method is as follows for the step 3:
The axial rigidity of bolt are as follows:
Wherein, LenThe equivalent length of threaded portion, unit mm are screwed for bolt and nut；LtFor bolt head and nut support
Long threaded portion between face, unit mm；LbFor bolt pole length, unit mm；LehFor bolt head equivalent length, unit mm；AbFor
Bolt light rod cross-sectional area Ab=π d2/ 4, unit mm2；AsFor flank cross-sectional area As=π (d-0.9382p)2/ 4, unit
mm2；D is bolt diameter, unit mm；P is thread pitch, unit mm；EbFor bolt material elasticity modulus, units MPa.
The specific method is as follows for the step 4:
Step 4-1: apply bolt initial pretightening force: the bolted system simulation analysis model established using step 2-3,
First load step is set, bolt initial pretightening force F is applied by pretightning force uniti, and solve the first load step；
Step 4-2: apply external applied load: on the basis of step 4-1 analyzes result, the second load of setting is walked, in bolt head and
Tail portion applies external applied load Fex, and Fex< 80%Fi, and solve the second load step；
Step 4-3: it extracts connected piece residual clamping force: on the basis of step 4-2 analyzes result, extracting connected piece knot
Conjunction face normal direction residual clamping force Fcf。
The specific method is as follows for the step 5:
Connected piece axial rigidity are as follows:
Compared with prior art, the invention has the following advantages:
It is calculated, compared with finite element and testing method with traditional theory, is able to solve "current" model with the present invention and deposits
Assuming that, measuring point be difficult to it is determining and indirectly measurement bring bolt connected piece Rigidity Calculation process is complicated, result inaccuracy,
The problems such as engineering adaptability is not strong realizes the quick, accurate of connected piece rigidity under different bolt fastening structures and carrying form
Calculating and self-adapting estimation, it is at low cost, time-consuming small, and it is easy to engineering site popularization and application, it can be quickly pre- for engineers and technicians
It surveys assembly connection performance and key index reference is provided, can also be bolt fastening structure optimization design based theoretical, while
To promote the intelligent Process of complicated machinery equipment to provide basic technology support.
[Detailed description of the invention]
Fig. 1 is connected piece Rigidity Calculation flow chart of the invention；
Fig. 2 is bolted system structural schematic diagram of the invention；
Fig. 3 is that bolt of the invention deforms equivalent-simplification structure type figure.
[specific embodiment]
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, the embodiment being not all of, and it is not intended to limit range disclosed by the invention.In addition, with
In lower explanation, descriptions of well-known structures and technologies are omitted, obscures concept disclosed by the invention to avoid unnecessary.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment should fall within the scope of the present invention.
The various structural schematic diagrams for disclosing embodiment according to the present invention are shown in the attached drawings.These figures are not in proportion
It draws, wherein some details are magnified for the purpose of clear expression, and some details may be omitted.As shown in the figure
The shape in various regions, layer and relative size, the positional relationship between them out is merely exemplary, in practice may be due to
Manufacturing tolerance or technical restriction and be deviated, and those skilled in the art may be additionally designed as required have not
Similar shape, size, the regions/layers of relative position.
In context disclosed by the invention, when one layer/element is referred to as located at another layer/element "upper", the layer/element
Can may exist intermediate layer/element on another layer/element or between them.In addition, if in a kind of court
One layer/element is located at another layer/element "upper" in, then when turn towards when, the layer/element can be located at another layer/
Element "lower".
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
The invention will be described in further detail with reference to the accompanying drawing:
Referring to Fig. 1, bolt connected piece rigidity adaptive recognition methods of the present invention, the specific steps are as follows:
1) it determines input parameter, comprises the following steps:
It 1-1) determines geometric dimension and material parameter: determining connected piece, the geometric dimension of bolt and material properties parameter；
It 1-2) determines load parameter: determining initial bolt pretightening load and external application load.
2) bolted system simulation analysis model is established, is comprised the following steps:
2-1) establish bolted system geometrical model: it is several to establish bolted system two-dimensional symmetric using finite element software
What model；
It 2-2) establishes bolted system grid model: being divided by material properties setting, grid dividing and preload unit,
Establish bolted system two-dimensional symmetric grid model；
It 2-3) establishes bolted system simulation analysis model: contact function, including spiral shell is set between crucial faying face
Contact surface, connected piece and nut contact surface, nut thread and bolt spiral shell between bolt head and connected piece contact surface, connected piece
Displacement constraint is arranged in lower connected piece lower surface, to establish bolted system two-dimensional symmetric simulation analysis in the line field of conjugate action
Model.
3) bolt axial rigidity is calculated, is comprised the following steps:
The axial rigidity of bolt are as follows:
In formula, LenThe equivalent length of threaded portion, unit mm are screwed for bolt and nut；LtFor bolt head and nut support
Long threaded portion between face, unit mm；LbFor bolt pole length, unit mm；LehFor bolt head equivalent length, unit mm；AbFor
Bolt light rod cross-sectional area Ab=π d2/ 4, unit mm2；AsFor flank cross-sectional area As=π (d-0.9382p)2/ 4, unit
mm2；D is bolt diameter, unit mm；P is thread pitch, unit mm；EbFor bolt material elasticity modulus, units MPa.
4) it extracts outer load and acts on lower connected piece residual clamping force, comprise the following steps:
4-1) apply bolt initial pretightening force: the bolted system simulation analysis model established using step 2-3, setting
First load step applies bolt initial pretightening force F by pretightning force uniti, and solve the first load step；
4-2) apply external applied load: on the basis of step 4-1 analyzes result, the second load of setting is walked, in bolt head and tail portion
Apply external applied load Fex, and Fex< 80%Fi, and solve the second load step；
It 4-3) extracts connected piece residual clamping force: on the basis of step 4-2 analyzes result, extracting connected piece faying face
Normal direction residual clamping force Fcf。
5) connected piece axial rigidity is calculated, is comprised the following steps:
Connected piece axial rigidity are as follows:
Embodiment:
The present embodiment test specimen selects the mono- bolt fastening structure of GB/T 5782-2000M12, and it is axial to calculate bolt connected piece
Rigidity, and invention is further described in detail for attached drawing.Specific step is as follows:
1) input parameter is determined；
It 1-1) determines geometric dimension and material parameter: determining connected piece, the geometric dimension of bolt and material properties parameter,
Bolt specification M12, screw pitch p=1.5, connected piece is with a thickness of 20mm, internal diameter 13mm, outer diameter 160mm；Bolt and connected piece
Elastic modulus Eb=Em=2 × 105MPa；
1-2) determine assembly technology parameter: bolt initial pretightening force Fi=20kN, external applied load Fex=5kN.
2) bolted system simulation analysis model is established；
2-1) establish bolted system geometrical model: it is several to establish bolted system two-dimensional symmetric using finite element software
What model；
It 2-2) establishes bolted system grid model: being divided by material properties setting, grid dividing and preload unit,
Establish bolted system two-dimensional symmetric grid model；
It 2-3) establishes bolted system simulation analysis model: contact function, including spiral shell is set between crucial faying face
Contact surface, connected piece and nut contact surface, nut thread and bolt spiral shell between bolt head and connected piece contact surface, connected piece
Displacement constraint is arranged in lower connected piece lower surface, to establish bolted system two-dimensional symmetric simulation analysis in the line field of conjugate action
Model.
3) bolt axial rigidity is calculated；
The axial rigidity of bolt are as follows:
In formula, LenThe equivalent length of threaded portion, unit mm are screwed for bolt and nut；LtFor bolt head and nut support
Long threaded portion between face, unit mm；LbFor bolt pole length, unit mm；LehFor bolt head equivalent length, unit mm；AbFor
Bolt light rod cross-sectional area Ab=π d2/ 4, unit mm2；AsFor flank cross-sectional area As=π (d-0.9382p)2/ 4, unit
mm2；D is bolt diameter, unit mm；P is thread pitch, unit mm；EbFor bolt material elasticity modulus, units MPa.
Therefore, the axial rigidity of bolt are as follows: Kb=11275.33N/mm.
4) it extracts outer load and acts on lower connected piece residual clamping force；
4-1) apply bolt initial pretightening force: the bolted system simulation analysis model established using step 2-3, setting
First load step applies bolt initial pretightening force F by pretightning force uniti=20kN, and solve the first load step；
4-2) apply external applied load: on the basis of step 4-1 analyzes result, the second load of setting is walked, in bolt head and tail portion
Apply external applied load Fex=5kN, and solve the second load step；
It 4-3) extracts connected piece residual clamping force: on the basis of step 4-2 analyzes result, extracting connected piece faying face
Normal direction residual clamping force Fcf=16.279kN.
5) connected piece axial rigidity is calculated；
Connected piece axial rigidity are as follows:
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (6)
1. a kind of bolt connected piece rigidity adaptive recognition methods, which comprises the following steps:
Step 1: determining input parameter；
Step 2: establishing bolted system simulation analysis model；
Step 3: calculating bolt axial rigidity；
Step 4: extracting outer load and act on lower connected piece residual clamping force；
Step 5: calculating connected piece axial rigidity.
2. bolt connected piece rigidity adaptive recognition methods according to claim 1, which is characterized in that the step 1
The specific method is as follows:
Step 1-1: geometric dimension and material parameter are determined: determines connected piece, the geometric dimension of bolt and material properties parameter；
Step 1-2: it determines load parameter: determining initial bolt pretightening load and external application load.
3. bolt connected piece rigidity adaptive recognition methods according to claim 1, which is characterized in that the step 2
The specific method is as follows:
Step 2-1: establish bolted system geometrical model: it is several to establish bolted system two-dimensional symmetric using finite element software
What model；
Step 2-2: it establishes bolted system grid model: being divided by material properties setting, grid dividing and preload unit,
Establish bolted system two-dimensional symmetric grid model；
Step 2-3: it establishes bolted system simulation analysis model: contact function, including spiral shell is set between crucial faying face
Contact surface, connected piece and nut contact surface, nut thread and bolt spiral shell between bolt head and connected piece contact surface, connected piece
Displacement constraint is arranged in lower connected piece lower surface, to establish bolted system two-dimensional symmetric simulation analysis in the line field of conjugate action
Model.
4. bolt connected piece rigidity adaptive recognition methods according to claim 1, which is characterized in that the step 3
The specific method is as follows:
The axial rigidity of bolt are as follows:
Wherein, LenThe equivalent length of threaded portion, unit mm are screwed for bolt and nut；LtBetween bolt head and nut seat
Long threaded portion, unit mm；LbFor bolt pole length, unit mm；LehFor bolt head equivalent length, unit mm；AbFor bolt
Polished rod cross-sectional area Ab=π d2/4, unit mm2；AsFor flank cross-sectional area As=π (d-0.9382p)2/ 4, unit mm2；D is
Bolt diameter, unit mm；P is thread pitch, unit mm；EbFor bolt material elasticity modulus, units MPa.
5. bolt connected piece rigidity adaptive recognition methods according to claim 1, which is characterized in that the step 4
The specific method is as follows:
Step 4-1: apply bolt initial pretightening force: the bolted system simulation analysis model established using step 2-3, setting
First load step applies bolt initial pretightening force F by pretightning force uniti, and solve the first load step；
Step 4-2: apply external applied load: on the basis of step 4-1 analyzes result, the second load of setting is walked, in bolt head and tail portion
Apply external applied load Fex, and Fex< 80%Fi, and solve the second load step；
Step 4-3: it extracts connected piece residual clamping force: on the basis of step 4-2 analyzes result, extracting connected piece faying face
Normal direction residual clamping force Fcf。
6. bolt connected piece rigidity adaptive recognition methods according to claim 1, which is characterized in that the step 5
The specific method is as follows:
Connected piece axial rigidity are as follows:
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| CN110909425A (en) * | 2019-11-04 | 2020-03-24 | 西安交通大学 | Bolt flange connection process optimization design method capable of eliminating load overtravel |
| CN112560156A (en) * | 2020-12-24 | 2021-03-26 | 杭州群核信息技术有限公司 | Furniture dynamic design display method and system based on geometric constraint |
| WO2021088215A1 (en) * | 2019-11-05 | 2021-05-14 | 广西艾盛创制科技有限公司 | Iterative filtering topology optimization method for design of mortise-and-tenon connection structure |
| CN113127998A (en) * | 2021-04-30 | 2021-07-16 | 大连理工大学 | Finite element modeling method considering bolt stress field change in actual assembly process |
| CN113392544A (en) * | 2021-05-28 | 2021-09-14 | 东北林业大学 | Method for calculating contact load of planetary threaded roller bearing based on deformation coordination theory |
| CN113435077A (en) * | 2021-05-24 | 2021-09-24 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for determining strength parameters in fastener connecting structure |
| CN113536635A (en) * | 2021-07-15 | 2021-10-22 | 中国第一汽车股份有限公司 | Analysis method for clamping rigidity of auxiliary frame bushing assembly structure |
| CN113636098A (en) * | 2021-10-18 | 2021-11-12 | 成都飞机工业（集团）有限责任公司 | Design method of process stiffening piece for aircraft component |
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| CN110909425A (en) * | 2019-11-04 | 2020-03-24 | 西安交通大学 | Bolt flange connection process optimization design method capable of eliminating load overtravel |
| CN110909425B (en) * | 2019-11-04 | 2021-09-07 | 西安交通大学 | Bolt flange connection process optimization design method capable of eliminating load overtravel |
| WO2021088215A1 (en) * | 2019-11-05 | 2021-05-14 | 广西艾盛创制科技有限公司 | Iterative filtering topology optimization method for design of mortise-and-tenon connection structure |
| CN112560156A (en) * | 2020-12-24 | 2021-03-26 | 杭州群核信息技术有限公司 | Furniture dynamic design display method and system based on geometric constraint |
| CN113127998A (en) * | 2021-04-30 | 2021-07-16 | 大连理工大学 | Finite element modeling method considering bolt stress field change in actual assembly process |
| CN113435077A (en) * | 2021-05-24 | 2021-09-24 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for determining strength parameters in fastener connecting structure |
| CN113435077B (en) * | 2021-05-24 | 2023-08-22 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for determining strength parameters in fastener connecting structure |
| CN113392544A (en) * | 2021-05-28 | 2021-09-14 | 东北林业大学 | Method for calculating contact load of planetary threaded roller bearing based on deformation coordination theory |
| CN113536635A (en) * | 2021-07-15 | 2021-10-22 | 中国第一汽车股份有限公司 | Analysis method for clamping rigidity of auxiliary frame bushing assembly structure |
| CN113636098A (en) * | 2021-10-18 | 2021-11-12 | 成都飞机工业（集团）有限责任公司 | Design method of process stiffening piece for aircraft component |
| CN113636098B (en) * | 2021-10-18 | 2022-01-25 | 成都飞机工业（集团）有限责任公司 | Design method of process stiffening piece for aircraft component |
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