CN103675197A - Structure dynamics analysis method for semi-rigid battery substrate - Google Patents
Structure dynamics analysis method for semi-rigid battery substrate Download PDFInfo
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- CN103675197A CN103675197A CN201210316859.4A CN201210316859A CN103675197A CN 103675197 A CN103675197 A CN 103675197A CN 201210316859 A CN201210316859 A CN 201210316859A CN 103675197 A CN103675197 A CN 103675197A
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Abstract
The invention discloses a structure dynamics analysis method for a semi-rigid battery substrate. The semi-rigid battery substrate comprises a grid panel; the structure dynamics analysis method for the semi-rigid battery substrate comprises the following steps: performing simplified calculation according to an equal-rigidity rule, and acquiring geometrical parameters and material attributes of the simplified grid panel; calculating a temperature load needed for simulating grid surface pretightening force based on the material attributes; establishing a finite element analytical model based on the geometrical parameters, the material attributes and the temperature load, and calculating the inherent characteristics of the semi-rigid battery substrate and response to external excitation based on the finite element analytical model. According to the technical scheme in the invention, a reasonable structure dynamics analysis and calculation model can be established.
Description
Technical field
The present invention relates to the Structural Dynamics analytical approach of semi-rigidity substrate of battery technical field, particularly relate to a kind of Structural Dynamics analytical approach of semi-rigidity substrate of battery.
Background technology
The blank of China in this technical field filled up in the invention of semi-rigidity substrate of battery, in order to ensure board structure, meets design objective requirement, need to analyze its structural dynamic characteristics.
With rigidity cell substrates, compare, semi-rigidity substrate of battery is used fiberglass braided net to make grid panel, by clamp fixture, apply certain pretightning force, be fixed on and use on the framework that carbon fibre reinforced composite is entwined, wherein grid panel is a kind of flexible structure, lightweight, large flexibility, has pretightning force, along with the increase of the wire side pretightning force of grid panel, its rigidity significantly improves, and has obvious nonlinear characteristic.And the physical dimension of semi-rigidity substrate of battery is larger, netting twine is closeer, if press the physical size modeling of grid, model just has too many unit number and nodes, and amount of calculation is large.For obtaining rapidly and accurately the structural dynamic characteristics of semi-rigidity substrate of battery, be necessary to set up rational Structural Dynamics analysis and calculation model, the pretightning force of considering gridding panel and non-linear, studies cancellated Finite Element Method.
Therefore how setting up rational Structural Dynamics analysis and calculation model becomes one of current problem demanding prompt solution.
Summary of the invention
The technical matters that technical scheme of the present invention solves is how to set up rational Structural Dynamics analysis and calculation model.
For addressing the above problem, technical scheme of the present invention provides a kind of Structural Dynamics analytical approach of semi-rigidity substrate of battery, and described semi-rigidity substrate of battery comprises grid panel, and the Structural Dynamics analytical approach of described semi-rigidity substrate of battery comprises:
According to etc. rigidity principle, simplify calculating, the geometric parameter of the grid panel after being simplified and material properties;
Based on described material properties, calculate the required temperature loading of simulation wire side pretightning force;
Based on described geometric parameter, material properties and temperature load, set up finite element analysis model, based on described finite element analysis model, calculate inherent characteristic and the response to external excitation of described semi-rigidity substrate of battery.
Technical scheme of the present invention can realize under different pretightning force conditions, calculate fast the inherent characteristic of semi-rigidity substrate of battery, for set up semi-rigid board structure dynamic analysis finite element model with common finite element software, provide fundamental basis, for the design of semi-rigid solar cell array provides reliable basis, obtained the beneficial effect that improves computational accuracy, shortens the work period.
Accompanying drawing explanation
The process flow diagram of the Structural Dynamics analytical approach of the semi-rigidity substrate of battery that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the grid panel before the simplification that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the grid panel after the simplification that Fig. 3 provides for the embodiment of the present invention;
The comparison chart of netting twine sectional dimension before and after the equivalence that Fig. 4 provides for the embodiment of the present invention.
Embodiment
Semi-rigidity substrate of battery is used fiberglass braided net to make grid panel, by clamp fixture, apply certain pretightning force, be fixed on and use on the framework that carbon fibre reinforced composite is entwined, wherein grid panel is a kind of flexible structure, lightweight, large flexibility, there is pretightning force, along with the increase of the wire side pretightning force of grid panel, its rigidity significantly improves, and has obvious nonlinear characteristic.And the physical dimension of semi-rigidity substrate of battery is larger, netting twine is closeer, if press the physical size modeling of grid, model just has too many unit number and nodes, and amount of calculation is large.For obtaining rapidly and accurately the structural dynamic characteristics of semi-rigidity substrate of battery, the present invention proposes following technical proposals: a kind of Structural Dynamics analytical approach of semi-rigidity substrate of battery.
As shown in Figure 1, the Structural Dynamics analytical approach of described semi-rigidity substrate of battery, comprising:
Step S1, according to etc. rigidity principle, simplify calculating, the geometric parameter of the grid panel after being simplified and material properties;
Step S2, calculates the required temperature loading of simulation wire side pretightning force based on described material properties;
Step S3, sets up finite element analysis model based on described geometric parameter, material properties and temperature load, calculates inherent characteristic and the response to external excitation of described semi-rigidity substrate of battery based on described finite element analysis model.
In described step S1, etc. rigidity principle, be that adjacent n root netting twine is merged into one, obtain the grid panel after described simplification, with a more sparse grid, substitute former intensive grid.The sectional area of the grid panel central sill after simplifying by adjustment, tension and compression rigidity, bending stiffness and torsional rigidity, make the model of the grid panel after simplifying with the model of grid panel before simplification under identical load, produce identical distortion; Tension and compression rigidity, bending stiffness and the torsional rigidity of grid panel can obtain by careful finite element model calculating or experimental test.
In described step S2, by applying temperature loading, the grid panel of simulating after described simplification bears two-way pretightning force state.First in material constant, add the thermal expansivity of netting twine
, then determine prestress according to desired pretightning force N
, then according to generalized Hooke's law, obtain prestrain
, last given reference temperature
, can obtain the temperature loading that should apply on grid panel
(formula 1).
In described step S3, based on described geometric parameter and material properties, set up the geometric model of described finite element analysis model the definition material properties of described finite element analysis model; Based on described temperature load, define load and the boundary condition of described finite element analysis model.
The method has been set up more reasonably Structural Dynamics analysis and calculation model to semi-rigidity substrate of battery, has considered the pretightning force of grid panel and non-linear during modeling, can realize calculating the inherent characteristic of semi-rigidity substrate of battery under different pretightning force conditions; The rigidity principles such as employing, simplify computation model, have guaranteed analysis precision, have effectively solved a difficult problem for extensive numerical evaluation.
The present invention takes above-mentioned computing method, can realize calculating fast the inherent characteristic of semi-rigidity substrate of battery under different pretightning force conditions, for set up semi-rigid board structure dynamic analysis finite element model with common finite element software, provide fundamental basis, for the design of semi-rigid solar cell array provides reliable basis, obtained the beneficial effect that improves computational accuracy, shortens the work period.
Method of the present invention has been successfully applied to certain model semi-rigid solar cell array Structural Dynamics and has calculated, and has experienced flight test examination.
Below in conjunction with Fig. 1-4, describe the preferred embodiments of the present invention in detail.
In described step S1, according to etc. rigidity principle, master pattern is as shown in Figure 2 reduced to simplified model as shown in Figure 3, and adjacent n root netting twine is merged into one, and circular section is equivalent to square-section.Wherein:
(formula 4, t is wide with the square-section of circular section equivalence)
According to biaxial tensile test, calculate the elastic modulus E (E shown in formula 1) of netting twine.
In described step S2, calculate the required temperature loading of simulation wire side pretightning force.First in material constant, add the thermal expansivity of netting twine
, then determine prestress according to desired pretightning force N
, then according to generalized Hooke's law, obtain prestrain
, last given reference temperature
, can obtain the temperature loading that should apply on grid panel
(formula 1).
In described step S3, set up finite element analysis model, according to the result of calculation of step S1 and step S2, based on described geometric parameter and material properties, set up the geometric model of described finite element analysis model the definition material properties of described finite element analysis model; Based on described temperature load, define load and the boundary condition of described finite element analysis model, and the finite element model based on setting up calculates inherent characteristic and the response to external excitation of semi-rigidity substrate of battery.
Technical scheme of the present invention can realize under different pretightning force conditions, calculate fast the inherent characteristic of semi-rigidity substrate of battery, for set up semi-rigid board structure dynamic analysis finite element model with common finite element software, provide fundamental basis, for the design of semi-rigid solar cell array provides reliable basis, obtained the beneficial effect that improves computational accuracy, shortens the work period.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can utilize method and the technology contents of above-mentioned announcement to make possible change and modification to technical solution of the present invention; therefore; every content that does not depart from technical solution of the present invention; any simple modification, equivalent variations and the modification above embodiment done according to technical spirit of the present invention, all belong to the protection domain of technical solution of the present invention.
Claims (5)
1. a Structural Dynamics analytical approach for semi-rigidity substrate of battery, described semi-rigidity substrate of battery comprises grid panel, it is characterized in that, the Structural Dynamics analytical approach of described semi-rigidity substrate of battery comprises:
According to etc. rigidity principle, simplify calculating, the geometric parameter of the grid panel after being simplified and material properties;
Based on described material properties, calculate the required temperature loading of simulation wire side pretightning force;
Based on described geometric parameter, material properties and temperature load, set up finite element analysis model, based on described finite element analysis model, calculate inherent characteristic and the response to external excitation of described semi-rigidity substrate of battery.
2. the Structural Dynamics analytical approach of semi-rigidity substrate of battery as claimed in claim 1, is characterized in that, described according to etc. rigidity principle, simplify to calculate and comprise:
Adjacent n root netting twine is merged into one, obtain the grid panel after described simplification;
Adjust sectional area, tension and compression rigidity, bending stiffness and the torsional rigidity of the grid panel central sill after described simplification, the model that makes the grid panel after described simplification with simplify before the model of grid panel under identical load, produce identical distortion.
3. the Structural Dynamics analytical approach of semi-rigidity substrate of battery as claimed in claim 2, is characterized in that: tension and compression rigidity, bending stiffness and the torsional rigidity of described grid panel are calculated by finite element model.
4. the Structural Dynamics analytical approach of semi-rigidity substrate of battery as claimed in claim 1, it is characterized in that: describedly based on described material properties, calculate the required temperature loading of simulation wire side pretightning force and comprise: by applying temperature loading, the grid panel of simulating after described simplification bears two-way pretightning force state.
5. the Structural Dynamics analytical approach of semi-rigidity substrate of battery as claimed in claim 1, it is characterized in that: describedly based on described geometric parameter, material properties and temperature load, set up finite element analysis model and comprise: based on described geometric parameter and material properties, set up the geometric model of described finite element analysis model the definition material properties of described finite element analysis model; Based on described temperature load, define load and the boundary condition of described finite element analysis model.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104300041A (en) * | 2014-09-22 | 2015-01-21 | 上海复合材料科技有限公司 | Method for forming semi-rigid solar cell array substrate made of low-rigidity carbon fiber composite |
| CN109522622A (en) * | 2018-10-31 | 2019-03-26 | 中国运载火箭技术研究院 | A kind of in-orbit load working condition of multiple degrees of freedom solar battery array determines method and system |
| CN109891663A (en) * | 2017-04-13 | 2019-06-14 | 株式会社Lg化学 | Device and method for testing end plate |
| CN112115616A (en) * | 2020-09-21 | 2020-12-22 | 广东电网有限责任公司电力科学研究院 | Dynamic characteristic analysis method and device of power transmission tower |
| US11036901B2 (en) * | 2017-11-24 | 2021-06-15 | Boe Technology Group Co., Ltd. | Method and apparatus for simulating flexible panel |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300041A (en) * | 2014-09-22 | 2015-01-21 | 上海复合材料科技有限公司 | Method for forming semi-rigid solar cell array substrate made of low-rigidity carbon fiber composite |
| CN104300041B (en) * | 2014-09-22 | 2016-08-24 | 上海复合材料科技有限公司 | The forming method of Low rigidity carbon fibre composite substrate of semi-rigid solar cell array |
| CN109891663A (en) * | 2017-04-13 | 2019-06-14 | 株式会社Lg化学 | Device and method for testing end plate |
| CN109891663B (en) * | 2017-04-13 | 2021-09-14 | 株式会社Lg化学 | Apparatus and method for testing end plates |
| US11036901B2 (en) * | 2017-11-24 | 2021-06-15 | Boe Technology Group Co., Ltd. | Method and apparatus for simulating flexible panel |
| CN109522622A (en) * | 2018-10-31 | 2019-03-26 | 中国运载火箭技术研究院 | A kind of in-orbit load working condition of multiple degrees of freedom solar battery array determines method and system |
| CN109522622B (en) * | 2018-10-31 | 2023-04-18 | 中国运载火箭技术研究院 | Method and system for determining on-orbit load working condition of multi-degree-of-freedom solar cell array |
| CN112115616A (en) * | 2020-09-21 | 2020-12-22 | 广东电网有限责任公司电力科学研究院 | Dynamic characteristic analysis method and device of power transmission tower |
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