CN102663178B - Static analysis method based on finite element modeling of airborne active phased-array antenna - Google Patents
Static analysis method based on finite element modeling of airborne active phased-array antenna Download PDFInfo
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- CN102663178B CN102663178B CN201210087083.3A CN201210087083A CN102663178B CN 102663178 B CN102663178 B CN 102663178B CN 201210087083 A CN201210087083 A CN 201210087083A CN 102663178 B CN102663178 B CN 102663178B
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Abstract
The invention discloses a static analysis method based on finite element modeling of an airborne active phased-array antenna. The method comprises the following steps: 1) according to structural parameters of the airborne active phased-array antenna, determining a geometric model file, and inputting parameters of the geometric model file into Ansys; 2) setting antenna material attribute data in the geometric model file of the Ansys; 3) setting unit type and size of a geometric model of the antenna; 4) automatically dispersing the geometric model of the antenna into multiple units, and dividing finite elements by adopting Ansys free grids; 5) giving constraint conditions and boundary conditions of a finite element model of the antenna, computing deformation of a static load on the finite element model of the antenna and drawing a displacement deformation pattern and a stress cloud picture; 6) constructing an APDL (Ansys Parameter Design Language) macro document; and 7) directly generating the finite element model of the antenna. According to the method provided by the invention, the modeling efficiency of the finite element of the airborne active phased-array antenna is improved, and the time for static analysis of the airborne active phased-array antenna is shortened; and the method is an effective method for computing the static deformation of the airborne active phased-array antenna.
Description
Technical field
The present invention relates to phased array antenna in Radar Technology, particularly a kind of static analysis method based on Airborne Active Phased-Array Antenna finite element modeling.
Background technology
Active phase array antenna (Active Phased Array Antenna, APAA) technology is the new technology developing in recent years, and the impact that it brings radar development than any technology of monopulse, the pulse Doppler etc. at present tip is all deep and extensive.Active phase array antenna is the antenna that the current feed phase by controlling radiating element in array antenna changes pattern shapes.Control phase can change the peaked sensing of antenna radiation pattern, to reach the object of beam scanning.Under special circumstances, also can control the shape of minor level, minimum value position and whole directional diagram, for example, obtain cosecant square shape directional diagram and directional diagram is carried out to adaptive control etc.During with mechanical means rotating antenna, inertia is large, speed is slow, and phased array antenna has overcome this shortcoming, and the sweep velocity of wave beam is high.Its current feed phase is generally used electronics computer control, phase place pace of change fast (millisecond magnitude), i.e. and the variation of antenna radiation pattern maximal value sensing or other parameters is rapid.To sweep mutually the machine of substituting, to sweep be the maximum feature of active phase array antenna, and this mertialess beam scanning, gives Active Phased Array Radar many excellent properties.
Modern High-Tech is information-based, and fight combination property to airborne fire control radar and the requirement of reliability increased day by day, and traditional mechanical scanning pulse Doppler system fire control radar cannot meet these requirements.Microelectric technique, at a high speed, the development of large capacity electronic computer technology, active phase array antenna technology, hyperchannel multidimensional information treatment technology, expedited the emergence of Airborne Active Phased-Array Antenna.Airborne Active Phased-Array Antenna can not only meet modern advanced fighter to airborne fire control radar requirement, but also for fighter plane has brought a lot of new functions, the military technology commanding elevation that Shi Ge military power falls over each other to seize.
Static(al) deformation rule for Airborne Active Phased-Array Antenna is summarized, and needs mass data.If it is not dependence experience completely accumulates data high cost, very actual yet.
And the method for finite element modeling is finite element analysis (FEA, Finite Element Analysis), also referred to as finite element elements method (FEM, Finite Element Method), be a kind of high-effect, conventional computing method.
Therefore, utilize the method for finite element modeling Airborne Active Phased-Array Antenna to be carried out finite element modeling and carries out static analysis, the effective technological means of one that this field Airborne Active Phased-Array Antenna is carried out to deformation and Stress calculation.Also become this area technical matters urgently to be resolved hurrily at present.
Summary of the invention
For the problem and shortage existing in existing Airborne Active Phased-Array Antenna modeling method, the object of the present invention is to provide a kind of static analysis method based on Airborne Active Phased-Array Antenna finite element modeling, the analytical approach that the method can be out of shape for the finite element model static(al) that proposes a kind of automatic generation Airborne Active Phased-Array Antenna in Ansys system-based, compared with carrying out now the method for data summary, the present invention has not only improved the finite element modeling efficiency of Airborne Active Phased-Array Antenna, has also shortened the time of Airborne Active Phased-Array Antenna static analysis.
The object of the invention is to realize by following technical proposals:
Based on a static analysis method for Airborne Active Phased-Array Antenna finite element modeling, the method comprises the steps:
1) according to the structural parameters of Airborne Active Phased-Array Antenna, determine the geometric model file of Airborne Active Phased-Array Antenna, and by geometric model file parameters input Ansys;
2) Airborne Active Phased-Array Antenna material properties data are set in Ansys geometric model file;
3) cell type and the cell size of Airborne Active Phased-Array Antenna geometric model are set;
4) Airborne Active Phased-Array Antenna geometric model is separated into some unit automatically, the free Meshing Method that adopts Ansys to support is divided finite element;
5) constraint condition of given Airborne Active Phased-Array Antenna finite element model and boundary condition, calculate the deformation that basic load produces at Airborne Active Phased-Array Antenna finite element model, and draw displacement deformation figure and the stress cloud atlas of Airborne Active Phased-Array Antenna finite element model;
6) static analysis to step 5) Airborne Active Phased-Array Antenna finite element modeling according to step 1), builds APDL macro document;
7) by APDL macro document, be deposited under Ansys working directory, under Ansys runnable interface, call APDL macro document and directly generate Airborne Active Phased-Array Antenna finite element model.
Further aspect of the present invention is:
Described Airborne Active Phased-Array Antenna geometrical structure parameter comprises the parameter of cold drawing, radiant panel, T/R assembly and case.
Described Airborne Active Phased-Array Antenna material properties data comprise elastic modulus, Poisson ratio and density.
The elastic modulus of described cold drawing, T/R assembly (transmitting/receiving assembly) and case material is 70 × 10
3t/mm
2, Poisson ratio is 0.28, density is 2.7 × 10
-9t/mm
3; The elastic modulus of described radiant panel material is 6.58 × 10
3t/mm
2, Poisson ratio is 0.28, density is 1.87 × 10
-9t/mm
3.
Described cell type is SOLID98; The cellular construction of described cold drawing, T/R assembly, radiant panel and case is tetrahedron.
The present invention has following feature:
Utilize the method for finite element modeling, summarize for the static(al) deformation rule of Airborne Active Phased-Array Antenna, do not need mass data, cost is low, easy and simple to handle.And having utilized APDL macro document to shorten greatly the time that the deformation of Airborne Active Phased-Array Antenna finite element model generation is carried out to static analysis, is that a kind of static(al) to Airborne Active Phased-Array Antenna is out of shape the effective method of calculating.
Brief description of the drawings
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 is analytical approach process flow diagram of the present invention.
Fig. 2 is the geometric model figure of Airborne Active Phased-Array Antenna of the present invention.
Fig. 3 is the schematic diagram of the suffered constrained of Airborne Active Phased-Array Antenna finite element model of the present invention.
Fig. 4 is the displacement deformation figure of Airborne Active Phased-Array Antenna finite element model of the present invention.
Fig. 5 is the stress cloud atlas of Airborne Active Phased-Array Antenna finite element model of the present invention.
Embodiment
As shown in Figure 1, be somebody's turn to do the static analysis method based on Airborne Active Phased-Array Antenna finite element modeling, comprise the steps:
1) according to the structural parameters of Airborne Active Phased-Array Antenna, determine the geometric model file of Airborne Active Phased-Array Antenna, and by geometric model file parameters input Ansys; And in Ansys file, obtaining the geometric model of Airborne Active Phased-Array Antenna, the geometric model figure of Airborne Active Phased-Array Antenna is as shown in Figure 2.Wherein, Airborne Active Phased-Array Antenna geometrical structure parameter comprises the parameter of cold drawing, radiant panel, T/R assembly and case;
2) Airborne Active Phased-Array Antenna material properties data are set in Ansys geometric model file; Wherein, Airborne Active Phased-Array Antenna material properties data comprise elastic modulus, Poisson ratio and density;
In the present embodiment, the elastic modulus of cold drawing, T/R assembly and case material is 70 × 10
3t/mm
2, Poisson ratio is 0.28, density is 2.7 × 10
-9t/mm
3; The elastic modulus of described radiant panel material is 6.58 × 10
3t/mm
2, Poisson ratio is 0.28, density is 1.87 × 10
-9t/mm
3;
3) cell type and the cell size of Airborne Active Phased-Array Antenna geometric model are set; Wherein, described cell type is SOLID98; The cellular construction of described cold drawing, T/R assembly, radiant panel and case is tetrahedron;
4) Airborne Active Phased-Array Antenna geometric model is separated into some unit automatically, the free Meshing Method that adopts Ansys to support is divided finite element;
5) constraint condition of given Airborne Active Phased-Array Antenna finite element model and boundary condition, calculate the deformation that basic load produces at Airborne Active Phased-Array Antenna finite element model, and draw displacement deformation figure and the stress cloud atlas of Airborne Active Phased-Array Antenna finite element model.Wherein 8 constraints are carried on the lower surface of Airborne Active Phased-Array Antenna finite element model case, and institute's Constrained is all full constraint, distribute, as shown in Figure 3 about the center of circle Central Symmetry of case circular bottom plate.The direction of the suffered basic load of antenna is-y direction that coordinate system as shown in Figure 2;
The displacement deformation figure of Airborne Active Phased-Array Antenna finite element model as shown in Figure 4, in Fig. 4, displacement cloud atlas result shows that Airborne Active Phased-Array Antenna finite element model is larger at the case panel place of Airborne Active Phased-Array Antenna finite element model displacement deformation, and other partial dislocations variations are less.The stress cloud atlas of Airborne Active Phased-Array Antenna finite element model as shown in Figure 4, in Fig. 5, the mark of light color shown in stress scale represents that the stress of Airborne Active Phased-Array Antenna finite element model is less, and dark mark shown in stress scale represents that the stress of Airborne Active Phased-Array Antenna finite element model is larger.Stress cloud atlas result shows that the stress of Airborne Active Phased-Array Antenna finite element model is larger at the position imposing restriction, next position that is subject to that stress is larger is the case side plate (case side plate position see in Fig. 5 shown in A) of Airborne Active Phased-Array Antenna finite element model, and the stress that other parts are subject to is less;
6) model analysis to step 5) Airborne Active Phased-Array Antenna finite element modeling according to step 1), builds APDL macro document;
7) by APDL macro document, be deposited under Ansys working directory, under Ansys runnable interface, call APDL macro document and directly generate Airborne Active Phased-Array Antenna finite element model.Utilize the program language of APDL to organize the finite element analysis order of Ansys, just can realize that the parametric modeling of Airborne Active Phased-Array Antenna, free grid are divided, the condition that imposes restriction and static analysis solve, thereby realize the overall process of Airborne Active Phased-Array Antenna Finite Element Static Analysis.The parameter that can revise simply taking APDL as basis wherein reaches multiple analytical plan or the sequentiality product of repeatedly analyzing various physical dimensions, different loads size, greatly improve analysis efficiency, shorten the analytical cycle of Airborne Active Phased-Array Antenna, reduced analysis cost.
The above; only for preferably embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.
Claims (2)
1. the static analysis method based on Airborne Active Phased-Array Antenna finite element modeling, is characterized in that, the method comprises the steps:
1) according to the structural parameters of Airborne Active Phased-Array Antenna, determine the geometric model file of Airborne Active Phased-Array Antenna, and by geometric model file parameters input Ansys;
2) Airborne Active Phased-Array Antenna material properties data are set in Ansys geometric model file;
3) cell type and the cell size of Airborne Active Phased-Array Antenna geometric model are set;
4) Airborne Active Phased-Array Antenna geometric model is separated into some unit automatically, the free Meshing Method that adopts Ansys to support is divided finite element;
5) constraint condition of given Airborne Active Phased-Array Antenna finite element model and boundary condition, calculate the deformation that basic load produces at Airborne Active Phased-Array Antenna finite element model, and draw displacement deformation figure and the stress cloud atlas of Airborne Active Phased-Array Antenna finite element model;
Wherein, 8 constraints are carried on the lower surface of Airborne Active Phased-Array Antenna finite element model case, and institute's Constrained is all full constraint, distribute about the center of circle Central Symmetry of case circular bottom plate;
Displacement cloud atlas result shows that Airborne Active Phased-Array Antenna finite element model is larger at the case panel place of Airborne Active Phased-Array Antenna finite element model displacement deformation, and other partial dislocations variations are less;
Stress cloud atlas result shows that the stress of Airborne Active Phased-Array Antenna finite element model is larger at the position imposing restriction, and next position that is subject to that stress is larger is the case side plate of Airborne Active Phased-Array Antenna finite element model, and the stress that other parts are subject to is less;
6) static analysis to step 5) Airborne Active Phased-Array Antenna finite element modeling according to step 1), builds APDL macro document;
7) by APDL macro document, be deposited under Ansys working directory, under Ansys runnable interface, call APDL macro document and directly generate Airborne Active Phased-Array Antenna finite element model;
Described Airborne Active Phased-Array Antenna structural parameters comprise the parameter of cold drawing, radiant panel, T/R assembly and case;
Described Airborne Active Phased-Array Antenna material properties data comprise elastic modulus, Poisson ratio and density;
The elastic modulus of described cold drawing, T/R assembly and case material is 70 × 10
3t/mm
2, Poisson ratio is 0.28, density is 2.7 × 10
-9t/mm
3; The elastic modulus of described radiant panel material is 6.58 × 10
3t/mm
2, Poisson ratio is 0.28, density is 1.87 × 10
-9t/mm
3.
2. a kind of static analysis method based on Airborne Active Phased-Array Antenna finite element modeling according to claim 1, is characterized in that, described cell type is SOLID98; The cellular construction of described cold drawing, T/R assembly, radiant panel and case is tetrahedron.
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| CN104410442B (en) * | 2014-11-05 | 2017-11-03 | 北京智谷睿拓技术服务有限公司 | Wireless signal transmitting method, emitter and unmanned plane |
| CN112199880A (en) * | 2020-10-27 | 2021-01-08 | 北京机电工程总体设计部 | Antenna housing parameterization and strength rapid analysis simulation system |
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| CN102073754A (en) * | 2010-09-20 | 2011-05-25 | 西安电子科技大学 | Comprehensive electromechanical analysis method of reflector antenna based on error factor |
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