CN110414068A - A method of using finite element analysis software C-shaped tunneltron intensity and stability - Google Patents
A method of using finite element analysis software C-shaped tunneltron intensity and stability Download PDFInfo
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- CN110414068A CN110414068A CN201910588925.5A CN201910588925A CN110414068A CN 110414068 A CN110414068 A CN 110414068A CN 201910588925 A CN201910588925 A CN 201910588925A CN 110414068 A CN110414068 A CN 110414068A
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Abstract
The invention discloses a kind of using finite element analysis software C-shaped tunneltron intensity and the method for stability, the present invention is based on C-shaped tunneltron limit load analysis, Eigenvalue Buckling Analysis and nonlinear buckling analysis in method, it is desirable to provide a kind of software for being automatically performed C-shaped tunneltron intensity and stability analysis and exporting analysis result.The software writes corresponding algorithm routine with APDL language in ANSYS, carries out secondary development to ANSYS software in conjunction with VB language.Software program interface is simple, easily operated, facilitates the structure design of C-shaped tunneltron.User can carry out finite element analysis to C-shaped tunneltron by the software, evaluate influence of the Different structural parameters to C-shaped tunneltron intensity and stability, simplify the analytic process to C-shaped tunneltron, also the optimization for tunneltron dimensional structure provides reference frame.
Description
Technical field
The present invention relates to a kind of tunneltron intensity and method for analyzing stability, in particular to apply finite element analysis software C
The method of shape tunneltron intensity and stability.
Background technique
Tunneltron is widely used in the industrial departments such as space flight, aviation, machinery, with the development of science and technology the effect of tunneltron
It is more and more big with importance.Tunneltron is divided into C, U, S etc. according to the form of wave there are many form of kind.Wherein c-type tunneltron mesh
It is preceding in space industry using more, c-type tunneltron dimensional structure parameter includes wall thickness, wave height, pitch of waves etc..Different dimensional structure ginsengs
The influence of several pairs of C-shaped tunneltron intensity and stability is different.
ANSYS software has powerful calculating and post-processing function, and the generation and analysis for simplifying finite element model are completed
Data processing and interpretation of result afterwards.
Analysis type common for tunneltron intensity and Finite element analysis of stability at present includes limit load analysis, spy
Value indicative buckling analysis and nonlinear buckling analysis.C-shaped tunneltron dimensional parameters are more, to the C-shaped tunneltron of different structure size
When carrying out finite element analysis, analytic process is relatively complicated, and repetitive operation amount is big.And analyze personnel need to be grasped it is certain limited
Meta analysis basis.
Summary of the invention
For the problem present on, the present invention provides a kind of application finite element analysis software C-shaped tunneltron intensity and
The method of stability.Based on limit load analysis, Eigenvalue Buckling Analysis and nonlinear buckling analysis method, with ANSYS
Middle APDL language writes corresponding algorithm routine, carries out secondary development to ANSYS software in conjunction with VB language, obtains for C-shaped tunnel
Deferent carries out the software of finite element analysis, and C-shaped tunneltron dimensional parameters are input in the software and carry out intensity and analysis of stability
Analysis directly obtains corresponding maximum external pressure LOAD FOR as a result, providing a kind of new analysis for C-shaped tunneltron finite element analysis
Method, the analysis method is simple, practical, meets objective reality.The structure of tunneltron is facilitated to design simultaneously.
During loading, plastic zone constantly expands C-shaped tunneltron, when load increases to a certain limiting value, C-shaped tunnel
Plastic Flow occurs for pipe, and this state is known as plastic limit state, and corresponding load is known as " ultimate load ".To C-shaped tunneltron
Apply a sufficiently large external pressure, makes it into plastic limit state, obtain corresponding ultimate load.
Eigenvalue Buckling Analysis refers to structure under external load function, second equilibrium state occurs.It is solved in derivation
The problem of being a solution characteristic value, therefore referred to as Eigenvalue Buckling Analysis.Apply the external pressure of specific loading to tunneltron, thus
Obtain critical load value.
Nonlinear buckling analysis considers geometrical non-linearity, material nonlinearity, to carry out Nonlinear Instability analysis to structure.
Geometrical non-linearity is to apply initial imperfection when calculating, to change the original shape of structure.Apply when to the analysis of C-shaped tunneltron
0.1 times of initial imperfection is analyzed using ideal elastic-plastic curved material model.Structure is obtained using nonlinear buckling analysis
Critical load value when buckling occurs.
A method of using finite element analysis software C-shaped tunneltron intensity and stability, the underlying carrier of method is needle
To the software of C-shaped tunneltron intensity and Stability Analysis and Design, which includes path setup module, parameter setting mould
Block, finite element analysis module and result output module.Software flow pattern is as shown in Figure 1.
Path setup module, the path that setting ANSYS starts path and project saves；
Parameter setting module, input analysis software required parameter when running, including C-shaped tunneltron structural parameters, material
Expect attribute and design condition.
Finite element analysis module carries out finite element analysis, including ultimate load point according to the C-shaped tunneltron parameter of input
Analysis, Eigenvalue Buckling Analysis and nonlinear buckling analysis.
As a result output module extracts simultaneously explicit finite element analysis result cloud atlas and corresponding maximum external pressure load value.
Compared with prior art, the beneficial effects of the present invention are:
1, the present invention writes with APDL language in ANSYS for C-shaped tunneltron intensity and Finite element analysis of stability
Algorithm routine carries out secondary development to ANSYS software in conjunction with VB language, provides for C-shaped tunneltron finite element analysis a kind of new
Analysis method, the analysis method is simple, practical, meets objective reality.The structure of tunneltron is facilitated to design simultaneously；
2, when carrying out finite element analysis to the C-shaped tunneltron of different structure size, this invention simplifies analytic processes, shorten
Calculating time.
Detailed description of the invention
Fig. 1 is software flow pattern of the invention；
Fig. 2 is the starting set interface of the specific embodiment of the invention；
Fig. 3 is the parameter setting interface of the specific embodiment of the invention；
Fig. 4 is the limit load analysis interface of the specific embodiment of the invention；
Fig. 5 is the Eigenvalue Buckling Analysis interface of the specific embodiment of the invention；
Fig. 6 is the nonlinear buckling analysis interface of the specific embodiment of the invention.
Specific embodiment
In order to which objects and advantages of the present invention are more clearly understood, the present invention is carried out with reference to embodiments further
It is described in detail.
As shown in Fig. 2, the purpose of starting setting is to call ANSYS program and working directory is arranged.Concrete operations: dish is clicked
Single<setting>, pops up dialog box, and ANSYS is arranged by first navigation button and starts path, is set by second navigation button
Set project storing path.
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing:
(1) by parameter setting window input structure parameter, material properties and design condition, as shown in Figure 3.
(2) it clicks limit load analysis button and enters limit load analysis interface, as shown in Figure 4.In applying load frame
External pressure load value is inputted, analysis button is clicked, display results button is clicked after the completion of to be calculated.
(3) click feature value buckling analysis button enters Eigenvalue Buckling Analysis interface, as shown in Figure 5.Completion to be calculated
Display results button is clicked afterwards, shows Eigenvalue Buckling Analysis result figure.
(4) it clicks nonlinear buckling analysis button and enters nonlinear buckling analysis interface, as shown in Figure 6.Completion to be calculated
Display results button is clicked afterwards, shows nonlinear buckling analysis result figure.
Based on limit load analysis, Eigenvalue Buckling Analysis and nonlinear buckling analysis method, with APDL in ANSYS
Language writes corresponding algorithm routine, carries out secondary development to ANSYS software in conjunction with VB language.
During loading, plastic zone constantly expands structure, and when load increases to a certain limiting value, plasticity occurs for structure
Flowing, this state are known as plastic limit state, and corresponding load is known as " ultimate load ".One foot is applied to C-shaped tunneltron
Enough big external pressures, make it into plastic limit state, obtain corresponding ultimate load.
Eigenvalue Buckling Analysis refers to structure under external load function, second equilibrium state occurs.It is solved in derivation
The problem of being a solution characteristic value, therefore referred to as Eigenvalue Buckling Analysis.Apply the external pressure of specific loading to tunneltron, thus
Obtain critical load value.
Nonlinear buckling analysis considers geometrical non-linearity, material nonlinearity, to carry out Nonlinear Instability analysis to structure.
Geometrical non-linearity is to apply initial imperfection when calculating, to change the original shape of structure.Apply when to the analysis of C-shaped tunneltron
0.1 times of initial imperfection is analyzed using ideal elastic-plastic curved material model.Structure is obtained using nonlinear buckling analysis
Critical load value when buckling occurs.
Characteristic value load value is generally higher than non-linear load value, this is because characteristic value load value had ignored in calculating it is several
What non-linear influence to structure, therefore characteristic value load value is not guarded partially, is not used usually in engineering.Ultimate load value with
Non-linear load is close and is less than characteristic value load, illustrates that rigidity has allowance when structural strength deficiency.
Claims (4)
1. a kind of using finite element analysis software C-shaped tunneltron intensity and the method for stability, C-shaped tunneltron is in loading procedure
In, plastic zone constantly expands, and when load increases to a certain limiting value, Plastic Flow occurs for C-shaped tunneltron, and this state is known as
Plastic limit state, corresponding load are known as " ultimate load "；To C-shaped tunneltron apply a sufficiently large external pressure, make its into
Enter plastic limit state, obtains corresponding ultimate load；
Eigenvalue Buckling Analysis refers to structure under external load function, second equilibrium state occurs；What is solved in derivation is one
The problem of a solution characteristic value, therefore referred to as Eigenvalue Buckling Analysis；The external pressure for applying specific loading to tunneltron, to obtain
Critical load value；
Nonlinear buckling analysis considers geometrical non-linearity, material nonlinearity, to carry out Nonlinear Instability analysis to structure；Geometry
Non-linear is to apply initial imperfection when calculating, to change the original shape of structure；Apply 0.1 times when to the analysis of C-shaped tunneltron
Initial imperfection, analyzed using ideal elastic-plastic curved material model；Structure is obtained using nonlinear buckling analysis
Critical load value when buckling；
It is characterized by: the underlying carrier of this method is the software for C-shaped tunneltron intensity and Stability Analysis and Design, this point
Analysing software includes path setup module, parameter setting module, finite element analysis module and result output module；
Path setup module, the path that setting ANSYS starts path and project saves；
Parameter setting module, input analysis software required parameter when running, including C-shaped tunneltron structural parameters, material category
Property and design condition；
Finite element analysis module carries out finite element analysis, including limit load analysis, spy according to the C-shaped tunneltron parameter of input
Value indicative buckling analysis and nonlinear buckling analysis；
As a result output module extracts simultaneously explicit finite element analysis result cloud atlas and corresponding maximum external pressure load value.
2. a kind of C-shaped tunneltron intensity according to claim 1 and Finite element analysis of stability software, it is characterised in that:
Based on limit load analysis, Eigenvalue Buckling Analysis and nonlinear buckling analysis method, write with APDL language in ANSYS
Corresponding algorithm routine carries out secondary development to ANSYS software in conjunction with VB language；
During loading, plastic zone constantly expands structure, and when load increases to a certain limiting value, plasticity stream occurs for structure
Dynamic, this state is known as plastic limit state, and corresponding load is known as " ultimate load "；One is applied enough to C-shaped tunneltron
Big external pressure, makes it into plastic limit state, obtains corresponding ultimate load；
Eigenvalue Buckling Analysis refers to structure under external load function, second equilibrium state occurs；What is solved in derivation is one
The problem of a solution characteristic value, therefore referred to as Eigenvalue Buckling Analysis；The external pressure for applying specific loading to tunneltron, to obtain
Critical load value；
Nonlinear buckling analysis considers geometrical non-linearity, material nonlinearity, to carry out Nonlinear Instability analysis to structure；Geometry
Non-linear is to apply initial imperfection when calculating, to change the original shape of structure；Apply 0.1 times when to the analysis of C-shaped tunneltron
Initial imperfection, analyzed using ideal elastic-plastic curved material model；Structure is obtained using nonlinear buckling analysis
Critical load value when buckling.
3. a kind of C-shaped tunneltron intensity according to claim 1 and Finite element analysis of stability software, it is characterised in that:
Characteristic value load value is generally higher than non-linear load value, this is because to have ignored geometry in calculating non-for characteristic value load value
Linearly to the influence of structure, therefore characteristic value load value is not guarded partially, is not used usually in engineering；Ultimate load value with it is non-thread
Property load it is close and be less than characteristic value load, illustrate when structural strength deficiency, rigidity has allowance.
4. a kind of analysis system using finite element analysis software C-shaped tunneltron intensity and stability according to claim 1
System, it is characterised in that:
The purpose of starting setting is to call ANSYS program and working directory is arranged；Concrete operations: menu<setting>, pop-up are clicked
Dialog box is arranged ANSYS by first navigation button and starts path, and project is arranged by second navigation button and saves road
Diameter；
(1) pass through parameter setting window input structure parameter, material properties and design condition；
(2) it clicks limit load analysis button and enters limit load analysis interface；External pressure load value is inputted in applying load frame,
Analysis button is clicked, display results button is clicked after the completion of to be calculated；
(3) click feature value buckling analysis button enters Eigenvalue Buckling Analysis interface；Display result is clicked after the completion of to be calculated
Button shows Eigenvalue Buckling Analysis result figure；
(4) it clicks nonlinear buckling analysis button and enters nonlinear buckling analysis interface；Display result is clicked after the completion of to be calculated
Button shows nonlinear buckling analysis result figure.
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