CN105389449A - Bolt strength analysis method - Google Patents
Bolt strength analysis method Download PDFInfo
- Publication number
- CN105389449A CN105389449A CN201510978137.9A CN201510978137A CN105389449A CN 105389449 A CN105389449 A CN 105389449A CN 201510978137 A CN201510978137 A CN 201510978137A CN 105389449 A CN105389449 A CN 105389449A
- Authority
- CN
- China
- Prior art keywords
- bolt
- node
- pretightning force
- pretension
- model
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/30—Circuit design
- G06F30/36—Circuit design at the analogue level
- G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a bolt strength analysis method, and solves the problem that the pre-tightening force cannot be added into strength analysis in the form of external force in analysis of the bolt strength. The bolt strength analysis method comprises the following steps: establishing a three-dimensional model according to a structure; and performing node division of the three-dimensional model, obtaining a variable under the action of the pre-tightening force according to a node coordinate of the model and the value of the pre-tightening force applied on a bolt node, obtaining the final variable through the variable, the node coordinate of the model and a display calculation formula after correction, obtaining the stress of a bolt, and analyzing the strength. The problem how to apply the pre-tightening force on the bolt can be solved; calculation can be accurately carried out; the analysis method is provided for the structure with the bolt; and the technical effect of increasing the design accuracy of a bolt related structure can be achieved.
Description
Technical field
The invention belongs to vehicle component technical field, relate to a kind of analysis of bolt strength.
Background technology
In prior art, the analysis of bolt strength, relates to following content:
Usually with following explicit algorithm bolt strength, display calculates the formula used and is
X is obtained by this formula
structure(t), thus the stress and strain calculating the dependency structure of bolt.
In the finite element simulation of engineering structure, a lot of structure can relate to bolt, and needs to apply pretightning force to bolt.If do not consider the effect of pretightning force, the result of simulation analysis can maybe cannot emulate in distortion.But pretightning force can not be added in formula with the form of external force in the analysis of bolt strength, therefore usually can not apply pretightning force to structure with during explicit algorithm, thus cause the x that calculates
structuret () is inaccurate.
Summary of the invention
The technical matters that the present invention solves is, a kind of analytical approach of bolt strength is provided, the method solves pretightning force in the analysis of bolt strength can not join the problem in bolt strength analytical approach with the form of external force, solve the technical matters of how accurately to carry out bolt strength analysis in mechanical manufacturing field.
Technical scheme of the present invention is: a kind of analytical approach of bolt strength, is characterized in that, the step of the method is as follows:
The first step: according to the structure of bolt and bolted all parts, is called for short structure; Set up the three-dimensional model of structure;
Second step: three-dimensional model is carried out node division, by node coordinate and the value being applied to the pretightning force on bolt joint of model, obtains the intermediate variable array x under pretightning force effect
pretension(t):
3rd step: the array x under the pretightning force effect drawn by second step
pretensiont the node coordinate of () knot and model, obtains final x
structure(t):
4th step: the stress and strain drawing bolt arrangement:
The x obtained
structuret () is multiplied by the stress that stress matrix draws structure, x
structuret () is multiplied by the strain that strain matrix draws structure;
5th step: the yield strength of said structure stress and bolt material is compared.
Technique effect of the present invention is: in the analytical approach of bolt strength of the present invention, the combination of implicit expression calculated relationship and explicit algorithm relation, before carrying out explicit algorithm, first utilize implicit expression to calculate and preliminary pretightning force is applied to bolt arrangement, explicit emulation is made to start to continue to calculate under the structure having pretightning force in structure, significantly can improve the accuracy of bolt result of calculation, solve and how also can ensure to calculate the problem of accurately carrying out to bolt applying pretightning force.For the structure containing bolt provides a kind of strength analysis method, the technique effect improving bolt dependency structure design accuracy can be reached.
Embodiment
The following detailed description of content of the present invention.
In the analytical approach of a kind of bolt strength of the present invention, the method comprises the steps:
The first step: according to the structure of bolt and bolted all parts, is called for short structure; Set up the three-dimensional model of structure;
Second step: three-dimensional model is carried out node (or grid) and divide, by the node coordinate of model and
Be applied to the value of the pretightning force on bolt joint, obtain the intermediate variable array x under pretightning force effect
pretension(t);
The value of the pretightning force on the node coordinate of input model and bolt joint, calculates according to formula (1), namely by implicit expression computing formula, obtains the array x under pretightning force effect
pretension(t).
Kx
pretension(t)=F
pretension(t) (1)
Wherein K is the rigidity of structure, comprises the rigidity of each node; F
pretensiont (), for being applied to the pretightning force on bolt, comprises the pretightning force of each node.
3rd step: the array x under the pretightning force effect drawn by second step
pretensiont the node coordinate of () knot and model, obtains final x
structure(t):
The array x that input second step draws
pretensiont the node coordinate of () result and model, calculates according to formula (2), namely by the display computing formula after correction, obtain x
structure(t)
Wherein M is the quality of structure, comprises the quality of each node; C is structural damping, comprises the damping of each node;
for the acceleration of structure, comprise the acceleration of each node,
for the speed of structure, comprise the speed of each node, K is the rigidity of structure, comprises the rigidity of each node; F (t) is for being applied to structural external force.W gets 1.
4th step: the stress and strain drawing bolt arrangement
The x obtained
structuret () is multiplied by (corresponding with each node), and stress matrix draws the stress of structure, x
structuret () is multiplied by (corresponding with each node), and strain matrix draws the strain of structure.
5th step: the yield strength of said structure stress and bolt material is compared, and the former is greater than the latter, does not meet the demands, and easily destroys; The former is less than the latter, then meet the demands, be then less likely to occur to destroy.
The analytical approach of a kind of bolt strength of the present invention, before carrying out explicit algorithm, first utilize implicit expression to calculate and preliminary pretightning force is applied to bolt arrangement, make explicit emulation start to continue to calculate under the structure having pretightning force in structure, significantly can improve the accuracy of bolt result of calculation.Can realize in the present invention applying pretightning force in explicit algorithm.
Claims (1)
1. an analytical approach for bolt strength, is characterized in that, the step of the method is as follows:
The first step: according to the structure of bolt and bolted all parts, is called for short structure; Set up the three-dimensional model of structure;
Second step: three-dimensional model is carried out node division, by node coordinate and the value being applied to the pretightning force on bolt joint of model, obtains the intermediate variable array x under pretightning force effect
pretension(t):
The value of the pretightning force on the node coordinate of input model and bolt joint, according to formula (1), obtains the array x under pretightning force effect
pretension(t);
Kx
pretension(t)=F
pretension(t) (1)
Wherein K is the rigidity of structure, comprises the rigidity of each node; F
pretensiont (), for being applied to the pretightning force on bolt, comprises the pretightning force of each node;
3rd step: the array x under the pretightning force effect drawn by second step
pretensiont the node coordinate of () knot and model, obtains final x
structure(t):
The array x that input second step draws
pretensiont the node coordinate of () and model, according to formula (2), obtains x
structure(t)
Wherein M is the quality of structure, comprises the quality of each node; C is structural damping, comprises the damping of each node;
for the acceleration of structure, comprise the acceleration of each node,
for the speed of structure, comprise the speed of each node, K is the rigidity of structure, comprises the rigidity of each node; F (t) is for being applied to structural external force; W gets 1;
4th step: the stress and strain drawing bolt arrangement:
The x obtained
structuret () is multiplied by the stress that stress matrix draws structure, x
structuret () is multiplied by the strain that strain matrix draws structure;
5th step: the yield strength of said structure stress and bolt material is compared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510978137.9A CN105389449A (en) | 2015-12-22 | 2015-12-22 | Bolt strength analysis method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510978137.9A CN105389449A (en) | 2015-12-22 | 2015-12-22 | Bolt strength analysis method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105389449A true CN105389449A (en) | 2016-03-09 |
Family
ID=55421733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510978137.9A Pending CN105389449A (en) | 2015-12-22 | 2015-12-22 | Bolt strength analysis method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105389449A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106294941A (en) * | 2016-07-29 | 2017-01-04 | 东南大学 | A kind of bolted-on attachment considering pretightning force closes face stiffness simulation method |
| CN106446459A (en) * | 2016-10-26 | 2017-02-22 | 中国特种设备检测研究院 | Pre-tightening optimization method of bolt connecting component |
| CN107169162A (en) * | 2017-04-13 | 2017-09-15 | 明阳智慧能源集团股份公司 | A kind of bolt strength simplified calculation method |
| CN110308055A (en) * | 2019-06-24 | 2019-10-08 | 航天材料及工艺研究所 | A method of improving composite material connector connection reliability |
| CN112733410A (en) * | 2021-04-06 | 2021-04-30 | 南京市特种设备安全监督检验研究院 | Bolt pretightening force identification method based on model correction and AR model |
| CN114689215A (en) * | 2022-03-16 | 2022-07-01 | 国网甘肃省电力公司电力科学研究院 | Method for monitoring fracture of connecting bolt of blade of wind generating set |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080283458A1 (en) * | 2007-04-20 | 2008-11-20 | Kimihiko Ishii | Separation column and liquid chromatography apparatus using the same |
| CN102930085A (en) * | 2012-10-18 | 2013-02-13 | 南车株洲电力机车研究所有限公司 | High-strength bolt strength calculating method of wind generating set |
| CN103020377A (en) * | 2012-12-26 | 2013-04-03 | 国电联合动力技术有限公司 | Bolt strength analysis method for directly-driven wind-driven generator |
-
2015
- 2015-12-22 CN CN201510978137.9A patent/CN105389449A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080283458A1 (en) * | 2007-04-20 | 2008-11-20 | Kimihiko Ishii | Separation column and liquid chromatography apparatus using the same |
| CN102930085A (en) * | 2012-10-18 | 2013-02-13 | 南车株洲电力机车研究所有限公司 | High-strength bolt strength calculating method of wind generating set |
| CN103020377A (en) * | 2012-12-26 | 2013-04-03 | 国电联合动力技术有限公司 | Bolt strength analysis method for directly-driven wind-driven generator |
Non-Patent Citations (3)
| Title |
|---|
| 中国防震减灾百科全书总编辑委员会: "《地震工程学》", 30 September 2014, 北震出版社 * |
| 李志红，肖念新: "《机械设计》", 31 August 2015, 中国农业科学技术出版社 * |
| 陈道礼，饶刚，魏国前: "《结构分析有限单元法的基本原理及工程应用》", 30 June 2012, 北京：冶金工业出版社 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106294941A (en) * | 2016-07-29 | 2017-01-04 | 东南大学 | A kind of bolted-on attachment considering pretightning force closes face stiffness simulation method |
| CN106294941B (en) * | 2016-07-29 | 2018-02-06 | 东南大学 | A kind of bolt connection combination face stiffness simulation method for considering pretightning force |
| CN106446459A (en) * | 2016-10-26 | 2017-02-22 | 中国特种设备检测研究院 | Pre-tightening optimization method of bolt connecting component |
| CN107169162A (en) * | 2017-04-13 | 2017-09-15 | 明阳智慧能源集团股份公司 | A kind of bolt strength simplified calculation method |
| CN110308055A (en) * | 2019-06-24 | 2019-10-08 | 航天材料及工艺研究所 | A method of improving composite material connector connection reliability |
| CN110308055B (en) * | 2019-06-24 | 2022-04-22 | 航天材料及工艺研究所 | Method for improving connection reliability of composite material connecting piece |
| CN112733410A (en) * | 2021-04-06 | 2021-04-30 | 南京市特种设备安全监督检验研究院 | Bolt pretightening force identification method based on model correction and AR model |
| CN114689215A (en) * | 2022-03-16 | 2022-07-01 | 国网甘肃省电力公司电力科学研究院 | Method for monitoring fracture of connecting bolt of blade of wind generating set |
| CN114689215B (en) * | 2022-03-16 | 2024-02-23 | 国网甘肃省电力公司电力科学研究院 | Wind generating set blade connecting bolt fracture monitoring method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105389449A (en) | Bolt strength analysis method | |
| CN102622472B (en) | Method for analyzing load and stress distribution and stress levels of composite mechanical connection pins | |
| CN104573172A (en) | Fatigue analysis method and fatigue analysis device of structural member in wind generating set | |
| CN103984803B (en) | Finite element load application method | |
| CN106354920B (en) | Base bearing axle sleeve strength analysis method and interference analysis method in Wind turbines | |
| CN104133926A (en) | Comprehensive analysis method of elastic aerodynamic force characteristic | |
| CN106777691B (en) | Rubber o-ring finite element modeling method for Structural Dynamics emulation | |
| CN105005671A (en) | Dynamics simulation analysis method of uniformly distributed load bearing system | |
| CN105069223A (en) | Method for checking ultimate strength and fatigue strength of wind turbine tower drum door opening | |
| CN106547963B (en) | Method and device for checking ultimate strength of fan yaw brake disc | |
| CN107976908B (en) | Aircraft coupling dynamic stability characteristic analysis method | |
| CN105716886A (en) | Aircraft landing gear load calibration method and test fake wheel structure | |
| CN109063401B (en) | Method for realizing structural contact force optimization by adopting equivalent static displacement | |
| CN103902504A (en) | Method for calculating inherent frequency of Euler-Bernoulli beam through improved differential transformation method | |
| CN109271655B (en) | Material scale effect analysis method based on asymmetric finite element algorithm | |
| CN107491627B (en) | Finite element global sensitivity analysis method in composite material drilling process | |
| CN109885961A (en) | A kind of electrical vehicular power assembly suspension operating condition force data processing method based on Excel | |
| CN107563102A (en) | A kind of power transmission skeleton method for visualizing of bearing structure | |
| CN108897966B (en) | Equivalent elasticity analysis method of buckling restrained brace structure based on elastic-plastic correction | |
| CN107256294B (en) | SSS clutch dynamics modeling method based on equivalent stiffness method | |
| CN103678753A (en) | Finite element calculation method of separated interface connecting strength | |
| CN104992012B (en) | Automobile back door stiffness analysis method | |
| CN106598224A (en) | Method for enhancing teleoperation telepresence based on virtual environment reconstruction | |
| WO2022106863A8 (en) | Method and system for accelerating the convergence of an iterative computation code of physical parameters of a multi-parameter system | |
| CN105677390A (en) | Method for recording and maintaining for large form |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160309 |