CN104657530A - Multi-scale simulation method of furnace lining structure - Google Patents
Multi-scale simulation method of furnace lining structure Download PDFInfo
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- CN104657530A CN104657530A CN201310600824.8A CN201310600824A CN104657530A CN 104657530 A CN104657530 A CN 104657530A CN 201310600824 A CN201310600824 A CN 201310600824A CN 104657530 A CN104657530 A CN 104657530A
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Abstract
Disclosed is a multi-scale simulation method of a furnace lining structure. The multi-scale simulation method of the furnace lining structure includes following steps: (1) building a microscopic damage mechanical model of fireproof material; (2) embedding the built microscopic damage mechanical model into finite element software, respectively analyzing the fireproof material from a macroscopic scale and a microcosmic scale, and achieving multi-scale simulation for the furnace lining structure. The multi-scale simulation method of the furnace lining structure can achieve overall optimization for microcosmic design of the fireproof material and macrostructure design of the furnace lining structure, prolongs use life of the furnace lining fireproof material, and reduces consumption of the fireproof material.
Description
Technical field
The present invention relates to a kind of furnace lining structure multi-dimension analogy method based on fire resistive material microscopic damage mechanics model, be specially a kind of furnace lining structure multi-dimension analogy method.
Background technology
Fire resistive material is widely used in the inner lining structure between all types of industries kiln of the industries such as metallurgy, machinery, petrochemical complex, building materials and elevated temperature vessel, is the indispensable important support material of hot industry thermal-energy equipment.But meanwhile, it is also rapid wear link the weakest in high temperature furnace lining structure.
The principal element of refractory damage is caused to comprise two aspects: one is the chemical erosion of slag to medium; One is the thermal stress damage produced in use procedure.The research of chemical erosion aspect, mainly based on physical chemistry, utilizes molecular dynamics and thermodynamics method to seek the erosion mechanism of fire resistive material.In this research field, material supplier author has done a large amount of work, achieves many achievements in research.And about the thermal stress damage of fire resistive material, main based on mathematics and mechanics method, utilize the numerical analysis techniques such as Finite Element, the thermal and mechanical stress stood in simulation, the use procedure of Forecast and evaluation fire resistive material and damage behavior, and be applied to the exploitation of the design and guidance fire resistive material of metallurgical furnace lining.But find, when numerical simulation analysis is carried out to refractory material furnace lining structure, still to there is some problems demand and solve under study for action.
First, in numerical simulation analysis, lack the constitutive relation model being applicable to characterizing fire resistive material nonlinear mechanics character; Secondly, when carrying out intensive analysis to furnace lining structure, lack the intensity evaluation standard or the failure criteria that are applicable to fire resistive material.
Summary of the invention
Technical matters solved by the invention is to provide a kind of furnace lining structure multi-dimension analogy method, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme:
A kind of furnace lining structure multi-dimension analogy method, comprises the following steps:
(1) the microscopic damage mechanics model of fire resistive material is set up;
In modeling process, adopt theoretical modeling and experimental study to carry out simultaneously, utilize the nonlinear mechanics character of fire resistive material to set up contact;
First, according to microstructure and the macro property experiment of fire resistive material, meso mechanical model is set up; Then, ultrasound wave and acoustic emission experiment is utilized to characterize the evolution mechanism explaining damage; Secondly, on this basis, adopt continuum damage mechanics method to set up microscopic damage mechanics model, and utilize experimental result correction model; Finally, comprehensive numerical simulation and experimental result, establish the numerical simulation based on the fire resistive material damage process of mesomechanics and intensity evaluation method;
(2) by set up microscopic damage mechanics model insertion in finite element software, on both macro and micro two yardsticks, fire resistive material is analyzed respectively, realizes the multi-scale Simulation of furnace lining structure.
In sum, beneficial effect of the present invention:
The present invention can make the Micro Instructional Design of fire resistive material and the macrostructure design of furnace lining structure reach total optimization, improves the serviceable life of fire proof material of furnace lining, reduces the consumption of fire resistive material.
Accompanying drawing explanation
The Technology Roadmap of Fig. 1 fire resistive material microscopic damage mechanics model;
The Technology Roadmap of Fig. 2 refractory material furnace lining structure multi-scale simulation.
Embodiment
Below in conjunction with the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
As shown in Figure 1-2, a kind of furnace lining structure multi-dimension analogy method, comprises the following steps:
(1) set up the microscopic damage mechanics model of fire resistive material, theoretical modeling and experimental study carry out simultaneously, utilize the nonlinear mechanics character of fire resistive material to set up contact;
Set up the microscopic damage mechanics model of fire resistive material, comprise the following steps:
1) fire resistive material microstructure analysis;
Adopt the phase composition, grain size distributed number, pore opening distributed number etc. of the means analysis fire resistive materials such as X-ray diffractometer (XRD), scanning electron microscope (SEM) and electron probe (EPMA), image analyzer and chemical analysis, grasp its micro-structural feature; Utilize Hysitron Tribolndenter to record the mechanical property of each thing phase, by simplify and abstract, extract expression its meso mechanical model characteristic parameter;
2) fire resistive material mechanical property test
Make fire resistive material test specimen by ASTM standard, carry out mechanical property test, obtain the data such as fire resistive material elastic modulus, Poisson ratio, intensity, stress-strain diagram;
3) meso mechanical model of fire resistive material is set up
When setting up meso mechanical model, first, by the microstructure analysis of fire resistive material, obtain material composi, volume content and space distribution thereof, and it simplified, take out the microstructural mesomechanics of fire resistive material and characterize---represent volume element; Then according to the constituent of fire resistive material, the Local physical performance of each component is determined; Secondly, utilize corresponding quantitative measurement method, measure the macro physical performance of material; Finally, utilize the homogenization method of heterogeneous material, set up fire resistive material represent volume element interior point stress and strain and apply between outer carrying relation, thus obtain the quantitative relationship between material microstructure and macro property;
4) Experimental Characterization of damage development process
The micromechanism damage of fire resistive material directly affects its macro-mechanical property, macro-scale and micro-scale are monitored its damage development process, on a macroscopic scale, select and can reflect its mechanical property, can reflect that again the elastic modulus of damage status is as index, utilizes ultrasonic technology to monitor; On a microscopic scale, adopt acoustic emission to monitor the damage strength of micromechanism and position, experimental situation is the thermal cycle cycle (heating-insulation-cooling) of carrying out Loading Control;
A) elastic modulus and temperature relation are tested;
The elastic modulus variation with temperature curve of fire resistive material during adopting ultrasound scanning technique (ultrasonic pulse echography) to record thermal cycle;
B) acoustic emission experiment
Acoustic emission (AE) is that material stressed effect is when producing distortion or fracture, a kind of phenomenon of strain energy is discharged with the form of elastic wave, it characterizes the change of material microstructure mechanical property, by detecting fire resistive material AE signal in the loaded state, research micro-crack produces, expansion is until the feature of AE signal of destructive process; According to the difference of different phase material cracking release stress wave, analyze the spectrum signature of AE signal when crackle occurs different parts in microstructure (mutually each or phase interface), be as the criterion and determine that a crack site provides foundation;
C) physical interpretation of damage development process and quantitatively characterizing thereof
The change of high-temperature elastic modulus is the macroscopic token of fire resistive material micromechanism damage, and acoustic emission signal can detect the damage of micromechanism; According to the elastic modulus variation with temperature curve of fire resistive material, the damage process of micromechanism is divided into some stages, and represents by different damage function; By analyzing hits and the frequency structure composition of acoustic emission signal, determine degree of injury and the position of micromechanism.Comprehensive Correlation elastic modulus change rule and acoustic emission detection analysis result, in conjunction with microstructure observing, the failure mechanism of fire resistive material micromechanism and the impact on macro-mechanical property thereof in reasonable dismissal Thermal Cycling, obtain the damage location of different phase in damage process, the mathematical description of degree of injury---damage function, utilize mesomechanics quantitative description damage process to lay the foundation;
5) the microscopic damage mechanics model of fire resistive material is set up
Utilize the fire resistive material meso mechanical model built, the change of research its microstructure internal stress state under state is carried in above-mentioned experiment outward, Binding experiment characterization result, contacting in comparative analysis fire resistive material damage process between the microscopic damage mechanism of different phase and meso mechanical model local stress state, the damage function of different damage type is counted meso mechanical model, set up the micromechanical damage model of fire resistive material, realize the quantitative description of its damage development process, for the numerical simulation of fire resistive material nonlinear mechanics character and intensity evaluation provide scientific basis;
6) modelling verification and nonlinear mechanics character emulate
Experimental result according to high-temperature elastic modulus change is revised model, utilizes revised microscopic damage mechanics model, the nonlinear mechanics character of simulation and emulation fire resistive material;
(2) by set up microscopic damage mechanics model insertion in finite element software, on both macro and micro two yardsticks, fire resistive material is analyzed respectively, realizes the multi-scale Simulation of furnace lining structure;
Realize furnace lining structure multi-scale Simulation to comprise the following steps:
A) multi-scale Simulation of refractory material furnace lining structure
Set up micromechanical damage model is embedded in business finite element software by establishment user's favorite subroutine.First on a macroscopic scale stress analysis is carried out to furnace lining structure, then the result utilizing macrostructure to analyze is as the boundary condition of the representative volume element of micromechanical damage model, obtain the local stress distribution representing volume element, predict the faulted condition of its micromechanism and the impact on macro structure damage thereof, the multi-scale Simulation of experimental furnace lining structure;
The macro-scale simulation of (i) furnace lining structure
Utilize general finite element analysis software, set up the finite element model of high temperature furnace lining structure; The quantitative description of the fire resistive material macro non-linear mechanical behavior based on microscopic damage mechanics is written as interface routine, is embedded in finite element analysis software, as the constitutive relation model of fire resistive material; By applying suitable boundary condition and load, the stress state of high temperature furnace lining structure is simulated;
(ii) the micro-scale simulation of fire resistive material
Particles of aggregates due to fire resistive material is um level, and finite element grid is generally mm level, therefore, can according to the result of FEM (finite element) calculation, the external applied load of equivalent homogeneous material (HEM) in meso mechanical model using each element stress value and temperature value, calculates respectively and represents volume element (RVE) various places inside stress; Utilize the microscopic damage mechanics model being embedded into fire resistive material in finite element software, judge faulted condition and the degree of injury of each phase material of fire resistive material, and show with different colours, for the design of high temperature furnace lining structure and intensity evaluation provide foundation;
B) global optimization of refractory material furnace lining structure
According to multi-scale Simulation result, from macroscopic view (furnace lining structure geometric configuration, boundary condition, material property) and microcosmic (microstructure of fire resistive material) two yardsticks, innovative approach is proposed, the Micro Instructional Design of fire resistive material and the macrostructure design of furnace lining structure is made to reach total optimization, reduce the damage probability of refractory material furnace lining, improve serviceable life.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.
In addition, be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (4)
1. a furnace lining structure multi-dimension analogy method, is characterized in that, comprises the following steps:
(1) the microscopic damage mechanics model of fire resistive material is set up;
(2) by set up microscopic damage mechanics model insertion in finite element software, on both macro and micro two yardsticks, fire resistive material is analyzed respectively, realizes the multi-scale Simulation of furnace lining structure.
2. a kind of furnace lining structure multi-dimension analogy method according to claim 1, is characterized in that, described microscopic damage mechanics model is in conjunction with the Experimental Characterization in meso mechanical model and damage process, adopts the model that continuum damage mechanics method is set up.
3. a kind of furnace lining structure multi-dimension analogy method according to claim 2, is characterized in that, described meso mechanical model is the model set up according to microstructure and the macro property experiment of fire resistive material.
4. a kind of furnace lining structure multi-dimension analogy method according to claim 2, it is characterized in that, the Experimental Characterization in described damage process is obtained by ultrasound wave and acoustic emission experiment.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106066913A (en) * | 2016-05-31 | 2016-11-02 | 西北工业大学 | Complex composite material structure equivalent material performance multi-dimension computational methods |
| CN107451307A (en) * | 2016-05-31 | 2017-12-08 | 西北工业大学 | A kind of method of Multi-Scale Calculation complex composite material structure effective stiffness matrix |
| CN109781531A (en) * | 2019-03-15 | 2019-05-21 | 本钢板材股份有限公司 | A method of the stress-strain diagram under prediction material at high temperature high strain rate |
| CN110210103A (en) * | 2019-05-27 | 2019-09-06 | 北京工业大学 | A kind of multi-dimension analogy method of heterogeneous composite material mechanical behavior |
| CN110688789A (en) * | 2019-08-29 | 2020-01-14 | 西安建筑科技大学 | Multi-scale response analysis method for carbon fiber composite unidirectional plate unbalance loading impact |
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| WO2005047891A3 (en) * | 2003-11-14 | 2005-06-23 | Concretec Ltd | Method, apparatus and system for forecasting strength of cementitious material |
| KR20070096166A (en) * | 2006-03-21 | 2007-10-02 | 현대자동차주식회사 | Methodology to determine the mechanical behavior of heterogeneous microstructure of aluminum metal matrix composites |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106066913A (en) * | 2016-05-31 | 2016-11-02 | 西北工业大学 | Complex composite material structure equivalent material performance multi-dimension computational methods |
| CN107451307A (en) * | 2016-05-31 | 2017-12-08 | 西北工业大学 | A kind of method of Multi-Scale Calculation complex composite material structure effective stiffness matrix |
| CN106066913B (en) * | 2016-05-31 | 2019-06-21 | 西北工业大学 | Complex composite material structure equivalent material performance multi-dimension calculation method |
| CN107451307B (en) * | 2016-05-31 | 2020-07-14 | 西北工业大学 | Method for multi-scale calculation of equivalent stiffness matrix of complex composite structure |
| CN109781531A (en) * | 2019-03-15 | 2019-05-21 | 本钢板材股份有限公司 | A method of the stress-strain diagram under prediction material at high temperature high strain rate |
| CN109781531B (en) * | 2019-03-15 | 2021-08-24 | 本钢板材股份有限公司 | Method for predicting stress-strain curve of material at high temperature and high strain rate |
| CN110210103A (en) * | 2019-05-27 | 2019-09-06 | 北京工业大学 | A kind of multi-dimension analogy method of heterogeneous composite material mechanical behavior |
| CN110688789A (en) * | 2019-08-29 | 2020-01-14 | 西安建筑科技大学 | Multi-scale response analysis method for carbon fiber composite unidirectional plate unbalance loading impact |
| CN110688789B (en) * | 2019-08-29 | 2022-09-13 | 西安建筑科技大学 | Multi-scale response analysis method for carbon fiber composite unidirectional plate unbalance loading impact |
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Application publication date: 20150527 |