CN101950316A - Design method of bionic spider web composite material structure - Google Patents
Design method of bionic spider web composite material structure Download PDFInfo
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Abstract
The invention discloses a design method of a bionic spider web composite material structure, comprising seven steps as follows: (1) performing static force analysis on stress of an original structure by finite-element analysis software to obtain a stress deformation cloud chart of the structure; (2) finding out the position of the maximum deformation region from the deformation cloud chart of the structure; (3) selectively arranging annular and arc-shaped regular latitudes and regular longitudes, wherein the maximum radius thereof is equal to or larger than the radius of the maximum deformation concentrated region; (4) arranging the regular longitudes in the mode that the regular longitudes are diffused to the periphery along the centers of the annular and arc-shaped regular latitudes, wherein the density of the longitudes is determined according to the order of magnitude of deformation of the maximum deformation concentrated region and the maximum deformation region; (5) arranging irregular longitudes along the gradient direction of deformation of the regions outside the maximum deformation concentrated region; (6) removing parts of materials from the sections of the structure having smaller stress deformation so as to form a hollow structure and reduce the whole mass of the structure; and (7) performing repeated design improvement on the original structure based on the above steps until the requirement is met.
Description
(1) technical field
The present invention relates to a kind of method for designing of bionical cobweb composite structure, be specifically related to the parts of military industry fields such as space flight, aviation, the light-weight design of machine tool component structure, is a kind of structure Design method.Belong to space flight and aviation and various physical construction light-weight design technical field.
(2) background technology
The development of space flight and aviation technology is had higher requirement to the design of various aircraft, guarantees that its reliability becomes the emphasis of research in the speed that improves aircraft, and this makes that the light-weight design of aircraft is more and more important.
Machining Technology requires lathe to have high acceleration, high precision.This just requires the little quality of machine tool motion component, high rigidity, and promptly the specific stiffness of motion structure parts wants high.This has also proposed requirement to the light-weight design of lathe.
At present, these parts light-weight design mainly contain two kinds of methods: the one, and by using " specific stiffness, specific strength " than higher material or fibre reinforced materials.Another kind method is under the prerequisite of certain material, the load condition of analytical structure, and the distribution of material of optimizing structure improves its strength and stiffness, thereby obtains the structure of high " specific strength ", " specific stiffness ".On existing structure design theory basis, further reduce structural member weight, improve the load performance of structural member, must seek new construction design method and thinking.
Natural biology has passed through very long evolutionary process, has formed various mechanical property excellences, structure unique biological structure gradually.These structures provide suggestive material for the mankind solve engineering technology problem.The structure of cobweb be exactly the Nature magical structure of moulding one of them.Cobweb can bear very big power, mainly is to be determined by the structure of cobweb and the special material of spider silk.Most of researchists of present stage are the constituent of the spider silk main contents as research, and less for the structural research of cobweb.Cobweb is made up of the silk of two kinds of heterogeneities, to around the silk drying of radiation sticking, and around the circle at center enclose thread as super glue, viscosity is extremely strong.The present invention is with regard to the heterogeneite of the structure that is based on cobweb and spider silk composition and obtain.By the structure and the material heterogeneite advantage of research cobweb, the method for designing of bionical cobweb composite structure has been proposed, apply it in the middle of the design of practical structure part, realize the light-weight design of aerospace structure spare.
(3) summary of the invention
1, purpose: the object of the present invention is to provide a kind of method for designing of bionical cobweb composite structure,, improve the specific strength of structure with the light-weight design of implementation structure spare.This construction design method can make original structure reduce the quality of structure, the lightweight of implementation structure, high rigidity Design under the situation that specific stiffness improves.
2, technical scheme:
See Fig. 1, Fig. 2, the cobweb structure has two kinds of forms, be annular cobweb structure and circular arc cobweb structure, therefore, bionical cobweb composite structure also has corresponding two kinds of versions, i.e. annular cobweb compound substance biomimetic features and circular arc cobweb compound substance biomimetic features.They are respectively by thimble 1, annular rule parallel 2, and regular warp 3, irregular warp 4, hollow 5, circular arc rule parallel 6 is formed; See Fig. 3, Fig. 4.
The method for designing of a kind of bionical cobweb composite structure of the present invention, these method concrete steps are as follows:
Step 1: before structural design, at first origianl structure part stressed carried out static analysis, obtain the stress deformation cloud atlas of structural member.This is easy to realize by means of finite element analysis software such as Ansys, Abaqus, MSC.Marc etc. commonly used, can observe the graded of malformation from the distortion cloud atlas.See Fig. 5.
Step 2: the position of from the distortion cloud atlas of structural member, finding the maximum distortion district.In general the maximum distortion district is a fritter area.To the maximum distortion place, the center that the center of thimble is chosen in maximum distortion place area gets final product with the thimble structural arrangement, and the radius of thimble structure depends on the size in maximum distortion district, and general thimble covers the maximum distortion district and gets final product.The thimble structure adopts the material of big elastic modulus (comparing the elastic modulus of original structure common material).
Step 3: gradient curve can be than comparatively dense around the general maximum distortion district, and the variation meeting of deflection size is slower, and deflection is also obviously big than the other parts of structural member, can be described as the maximum distortion concentration zones.Select to arrange annular, circular arc rule parallel and regular warp herein.The interval of annular, circular arc rule parallel is generally near more more little from the maximum distortion district, and is far away more big more from the distorted area.The width of every layer of regular parallel can be selected flexibly according to the density of deformation gradient field.The maximum radius of annular rule parallel is general to be selected to equate or greater than the radius of maximum distortion concentration zones.
Because being made up of several sections roundlet arcs of circular arc rule parallel, its member process is than the regular parallel slightly more complicated of annular.At first need make a circle in the maximum distortion concentration zones, a1 is bigger than the radius of maximum distortion concentration zones for this greatest circle radius R, as shown in Figure 6.On this greatest circle, be a roundlet R1 then, the selection principle of its radius is when guaranteeing this circle along the big circular array of greatest circle radius R a1, some intersects between the adjacent circle, and makes circular arc parallel greatest irradiation scope H among Fig. 6 greater than the radius of maximum distortion concentration zones as far as possible.Roundlet R1 finishes after the array, and the deletion redundance obtains residue multi-section circular arc as shown in Figure 6.After the outermost layer circular arc is finished, it is just formed each section of internal layer circular arc along greatest circle radius R a1 direction to proportional the dwindling in center, the ratio of convergent-divergent depends on the interval of width He each layer circular arc of every layer of circular arc.
Can select the bigger material of elastic modulus at annular, circular arc rule parallel near the maximum distortion district, promptly identical with the thimble material.Can select and the origianl structure part identical materials from maximum distortion district annular far away, circular arc rule parallel.
Step 4: the layout of regular warp generally is exactly middle mind-set this week diffusion, the just gradient direction that changes along distortion along annular, circular arc parallel.The distribution density of rule warp is decided according to the order of magnitude of maximum distortion concentration zones and the distortion of maximum distortion district, order of magnitude difference is bigger, the density of arranging just can strengthen, but the starting point of considering this construction design method promptly alleviates quality, the general selection arranged 10～16, and density need not be too big.The material of rule warp can be selected and the origianl structure part identical materials.
Step 5: also can some local deformation ratio bigger outside the maximum distortion concentration zones, but be much smaller than the distortion in above two zones.At this moment can arrange some irregular warps along the gradient direction of these region deformations.The material of irregular warp can be selected for use and the origianl structure part identical materials.
Step 6: be to remove the part material in the less part of structural member stress deformation to form hollow structure at last, to alleviate the quality of total part.Hollow removal area is also not too big, and too conference produces adverse influence to the dynamic stiffness of structural member.The removal of hollow parts generally also wants the model analysis of integrated structure spare to carry out, and the standard of judgement is whether the removal of hollow-core construction meets the deviser to the influence of structural member dynamic stiffness initial requirement.
Step 7: according to above design procedure origianl structure part is improved design repeatedly, satisfy deviser's requirement up to the result who revises.
3, advantage and effect: the structure of the method for designing design of the bionical cobweb composite structure of the present invention, its advantage is as follows:
(1) this structure can realize effective utilization of material, under the situation that guarantees the rigidity of structure, makes the maximum utilization factor of material performance.
(2) this tactical rule warp and annular, circular arc rule parallel structure interconnect, and can be good at resisting the distortion of structure in the stress deformation district, have strengthened the ability of structure resistance to deformation.
(3) the thimble structure of this structure centre is a solid torus, and it is in the maximum distortion zone, and the thimble center overlaps with the stress deformation center of maximum, can effectively reduce the deformation in structure maximum distortion district, improves the rigidity of structure.
(4) this irregular structure through line structure, it arranges along the deformation gradient direction as far as possible, can resist each main deformation direction stressed of structure greatly, and material is made the best use of everything.
(5) the hollow-core construction place is non-power optimum transfer path, has saved unnecessary material greatly, has alleviated the quality of structure under the situation that does not influence the rigidity of structure.
(6) annular, circular arc rule parallel, the regular warp material different with the structure choice of irregular warp, material is chosen according to stress deformation figure.
(7) this structure can make the quality of motion structure spare alleviate, and this makes the acceleration of motion structure spare get a promotion, to satisfy the requirement of various high accelerations.
(4) description of drawings
Fig. 1 annular cobweb structural drawing;
Fig. 2 circular arc cobweb structural drawing;
Fig. 3 annular cobweb of the present invention compound substance biomimetic features sketch;
Fig. 4 circular arc cobweb of the present invention compound substance biomimetic features sketch;
The rough schematic view of Fig. 5 structural member distortion cloud atlas;
Fig. 6 circular arc cobweb of the present invention compound substance biomimetic features circular arc mapping synoptic diagram sketch;
Fig. 7 the present invention's method for designing process flow diagram.
Number in the figure is described as follows:
1 thimble, 2 annulars rule parallel
3 regular warp 4 irregular warps
5 hollow 6 circular arcs rule parallels
Ra1 greatest circle radius R 1 roundlet arc 1 radius R 2 roundlet arc radius
H circular arc parallel greatest irradiation scope
In Fig. 5, the direction of arrow is to point to small deformation by large deformation, and the deformation gradient curve is represented in the shadow region, the scope of rectangular wire frame representative structure spare.
(5) embodiment
See Fig. 1, Fig. 2, the cobweb structure has two kinds of forms, i.e. annular cobweb structure and circular arc cobweb structure.The present invention is a kind of method for designing one annular cobweb compound substance biomimetic features and circular arc cobweb compound substance biomimetic features method for designing of bionical cobweb composite structure, utilizes the structure of this method design to see also Fig. 3, Fig. 4.This structure is mainly by thimble 1, annular rule parallel 2, regular warp 3, irregular warp 4, hollow 5 and circular arc rule parallel 6 form;
See Fig. 7, it is for the present invention's method for designing process flow diagram.According to different structure and force-bearing situation thereof and difference, the method for designing of a kind of bionical cobweb composite structure of the present invention, these method concrete steps are as follows:
Step 1: at first origianl structure part stressed carried out static analysis, obtain the stress deformation cloud atlas of structural member, from the distortion cloud atlas, can observe the graded of malformation with finite element analysis software such as Ansys.See Fig. 5.
Step 2: the position of from the distortion cloud atlas of structural member, finding the maximum distortion district.In general the maximum distortion district is a fritter area.To the maximum distortion place, the center that the center of thimble 1 is chosen in maximum distortion place area gets final product with thimble 1 structural arrangement, and the radius of thimble 1 structure depends on the size in maximum distortion district, and general thimble 1 covers the maximum distortion district and gets final product.Thimble 1 structure adopts the material of big elastic modulus (comparing the elastic modulus of original structure common material).
Step 3: gradient curve can be than comparatively dense around the general maximum distortion district, and the variation meeting of deflection size is slower, and deflection is also obviously big than the other parts of structural member, can be described as the maximum distortion concentration zones.Select to arrange annular, circular arc rule parallel 2,6 and regular warp 3 herein.The general radius of selecting to equate or be slightly larger than the maximum distortion concentration zones of maximum radius of annular, circular arc rule parallel 2,6.The interval of annular, circular arc rule parallel 2,6 is generally near more more little from the maximum distortion district, and is far away more big more from the distorted area.Can select the bigger material of elastic modulus at annular, circular arc rule parallel 2,6 near the maximum distortion district, promptly identical with thimble 1 material.Can select and the origianl structure part identical materials from maximum distortion district annular far away, circular arc rule parallel 2,6.Because circular arc rule parallel 6 is made up of several sections roundlet arcs, at first need make a circle in the maximum distortion concentration zones, a1 is bigger than the radius of maximum distortion concentration zones for this greatest circle radius R, as shown in Figure 6.On this greatest circle, do a roundlet arc 1 radius R 1 then, the selection principle of its radius is when guaranteeing this circle along the big circular array of greatest circle radius R a1, some intersects between the adjacent circle, and makes circular arc parallel greatest irradiation scope H among Fig. 6 greater than the radius of maximum distortion concentration zones as far as possible.Roundlet arc radius R 1 is finished after the array, and the deletion redundance obtains residue multi-section circular arc as shown in Figure 6.After the outermost layer circular arc is finished, it is just formed each section of internal layer circular arc along greatest circle radius R a1 direction to proportional the dwindling in center, the ratio of convergent-divergent depends on the interval of width He each layer circular arc of every layer of circular arc.
Step 4: the layout of regular warp 3 generally is exactly middle mind-set this week diffusion, the just gradient direction that changes along distortion along annular, circular arc rule parallel 2,6.The distribution density of rule warp 3 is decided according to the order of magnitude of maximum distortion concentration zones and the distortion of maximum distortion district, order of magnitude difference is bigger, the density of arranging just can strengthen, but the starting point of considering this construction design method promptly alleviates quality, select to arrange that the bar number does not generally surpass 16, promptly density is not too big.The material of rule warp 3 can be selected and the origianl structure part identical materials.
Step 5: also can some local deformation ratio bigger outside the maximum distortion concentration zones, but be much smaller than the distortion in above two zones.At this moment can arrange some irregular warps 4 along the gradient direction of these region deformations.The material of irregular warp 4 can be selected for use and the origianl structure part identical materials.
Step 6: be to remove the part material in the less part of structural member stress deformation to form hollow 5 structure at last, to alleviate the quality of total part.Hollow 5 removal area is also not too big, and too conference produces adverse influence to the dynamic stiffness of structural member.The removal of hollow 5 parts generally also wants the model analysis of integrated structure spare to carry out, and the standard of judgement is whether the removal of hollow 5 structures meets the deviser to the influence of structural member dynamic stiffness initial requirement.
Step 7: according to above design procedure origianl structure part is improved design repeatedly, satisfy deviser's requirement up to the result who revises.
Claims (1)
1. the method for designing of a bionical cobweb composite structure, it is characterized in that: bionical cobweb composite structure has two kinds of versions, be annular cobweb compound substance biomimetic features and circular arc cobweb compound substance biomimetic features, they are respectively by thimble (1), annular rule parallel (2), rule warp (3), irregular warp (4), hollow (5) and circular arc rule parallel (6) is formed; These method concrete steps are as follows:
Step 1: at first origianl structure part stressed carried out static analysis, obtain the stress deformation cloud atlas of structural member, from the distortion cloud atlas, observe the graded of malformation with finite element analysis software Ansys, Abaqus;
Step 2: the position of from the distortion cloud atlas of structural member, finding the maximum distortion district; The maximum distortion district is a fritter area, the center of thimble (1) is chosen in the center of maximum distortion place area, the radius of thimble (1) structure depends on the size in maximum distortion district and the maximum distortion district is covered that thimble (1) structure adopts the material of big elastic modulus;
Step 3: gradient curve is intensive around the maximum distortion district, the variation of deflection size is slow, deflection is also obviously big than the other parts of structural member, is the maximum distortion concentration zones, selects to arrange annular, circular arc rule parallel (2), (6) and regular warp (3) herein; The interval of annular, circular arc rule parallel (2), (6) is near more more little from the maximum distortion district, and is far away more big more from the distorted area; The maximum radius of annular, circular arc rule parallel (2), (6) is equal to or greater than the radius of maximum distortion concentration zones; Select the bigger material of elastic modulus in annular, circular arc rule parallel (2), (6) near the maximum distortion district, promptly identical with thimble (1) material; Can select and the origianl structure part identical materials from maximum distortion district annular far away, circular arc rule parallel (2), (6);
Step 4: the layout of regular warp (3) is exactly middle mind-set this week diffusion, the just gradient direction that changes along distortion along annular, circular arc rule parallel (2), (6) parallel; The distribution density of rule warp (3) is decided according to the order of magnitude of maximum distortion concentration zones and the distortion of maximum distortion district, order of magnitude difference is bigger, the density of arranging just can strengthen, and selects to arrange 10～16, and the material of regular warp (3) can be selected and the origianl structure part identical materials;
Step 5: also can some local deformation ratio bigger outside the maximum distortion concentration zones, but be much smaller than the distortion in above two zones; At this moment can arrange some irregular warps (4) along the gradient direction of these region deformations; The material selection of irregular warp (4) and origianl structure part identical materials;
Step 6: be to remove the structure that the part material forms hollow (5) at last, to alleviate the quality of total part in the less part of structural member stress deformation; The removal of hollow (5) part wants the model analysis of integrated structure spare to carry out, and the standard of judgement is whether the removal of hollow (5) structure meets the deviser to the influence of structural member dynamic stiffness initial requirement;
Step 7: according to above design procedure origianl structure part is improved design repeatedly, satisfy deviser's requirement up to the result who revises.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102693345A (en) * | 2012-06-08 | 2012-09-26 | 机械科学研究总院先进制造技术研究中心 | Method for modeling composite material preform with bionic structure |
| CN102729494A (en) * | 2012-06-08 | 2012-10-17 | 机械科学研究总院先进制造技术研究中心 | Composite material with bionic structure and preparation method thereof |
| WO2013181912A1 (en) * | 2012-06-08 | 2013-12-12 | 机械科学研究总院先进制造技术研究中心 | Composite material having bionic structure, method of preparing same, and modeling method |
| ES2432479R1 (en) * | 2012-06-01 | 2014-05-28 | Universidad De Las Palmas De Gran Canaria | Method for the identification and automatic classification of arachnid species through their spider webs |
| CN104613923A (en) * | 2015-03-01 | 2015-05-13 | 河南理工大学 | Evaluation system and evaluation method for deformation monitoring safety |
| CN109145393A (en) * | 2018-07-27 | 2019-01-04 | 燕山大学 | A kind of bionic structure light-weight design method |
| CN110293805A (en) * | 2019-07-30 | 2019-10-01 | 宁波合力模具科技股份有限公司 | A kind of bionical corrosion-resistant damping tower |
| CN112100738A (en) * | 2020-08-14 | 2020-12-18 | 中国第一汽车股份有限公司 | Method for calculating and analyzing normal dynamic stiffness of vehicle body metal plate in cloud picture form |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| ES2432479R1 (en) * | 2012-06-01 | 2014-05-28 | Universidad De Las Palmas De Gran Canaria | Method for the identification and automatic classification of arachnid species through their spider webs |
| EP2860649A1 (en) * | 2012-06-08 | 2015-04-15 | Advanced Manufacture Technology Center, China Academy of Machinery Science & Technology | Composite material having bionic structure, method of preparing same, and modeling method |
| WO2013181912A1 (en) * | 2012-06-08 | 2013-12-12 | 机械科学研究总院先进制造技术研究中心 | Composite material having bionic structure, method of preparing same, and modeling method |
| CN102729494A (en) * | 2012-06-08 | 2012-10-17 | 机械科学研究总院先进制造技术研究中心 | Composite material with bionic structure and preparation method thereof |
| CN102729494B (en) * | 2012-06-08 | 2014-09-24 | 机械科学研究总院先进制造技术研究中心 | Composite material with bionic structure and preparation method thereof |
| CN102693345B (en) * | 2012-06-08 | 2014-11-19 | 机械科学研究总院先进制造技术研究中心 | Method for modeling composite material preform with bionic structure |
| CN102693345A (en) * | 2012-06-08 | 2012-09-26 | 机械科学研究总院先进制造技术研究中心 | Method for modeling composite material preform with bionic structure |
| EP2860649A4 (en) * | 2012-06-08 | 2016-03-09 | Advanced Mft Tech Ct Cn Camst | Composite material having bionic structure, method of preparing same, and modeling method |
| CN104613923A (en) * | 2015-03-01 | 2015-05-13 | 河南理工大学 | Evaluation system and evaluation method for deformation monitoring safety |
| CN104613923B (en) * | 2015-03-01 | 2017-10-13 | 河南理工大学 | A kind of deformation monitoring safety estimation system and appraisal procedure |
| CN109145393A (en) * | 2018-07-27 | 2019-01-04 | 燕山大学 | A kind of bionic structure light-weight design method |
| CN110293805A (en) * | 2019-07-30 | 2019-10-01 | 宁波合力模具科技股份有限公司 | A kind of bionical corrosion-resistant damping tower |
| CN112100738A (en) * | 2020-08-14 | 2020-12-18 | 中国第一汽车股份有限公司 | Method for calculating and analyzing normal dynamic stiffness of vehicle body metal plate in cloud picture form |
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