CN109948255A - Increasing material manufacturing metal skin lattice structure and its design method for storage tank installation - Google Patents
Increasing material manufacturing metal skin lattice structure and its design method for storage tank installation Download PDFInfo
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- CN109948255A CN109948255A CN201910216424.4A CN201910216424A CN109948255A CN 109948255 A CN109948255 A CN 109948255A CN 201910216424 A CN201910216424 A CN 201910216424A CN 109948255 A CN109948255 A CN 109948255A
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- covering
- lattice structure
- spherical shell
- metal skin
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Abstract
This application involves space flight construction applications, in particular to a kind of increasing material manufacturing metal skin lattice structure and its design method for storage tank installation.The structure includes covering and space lattice structure, and space lattice structure filling is inside covering.Covering and space lattice structure form spherical shell structure.Fixed part is provided on the periphery wall of spherical shell structure, and fixed part is arranged on covering；Space lattice structure is for carrying storage tank.Lattice structure is filled in covering, so that entire bearing structure quality reduces, overall stiffness improves.Fixed part is arranged in spherical shell structure surrounding, so that entire bearing structure does not need the pull rod using support normal, rigidity is higher, bearing capacity is stronger.
Description
Technical field
This application involves space flight construction applications, in particular to a kind of increasing material manufacturing metal for storage tank installation
Covering lattice structure and its design method.
Background technique
Field of structural design (especially aerospace structure), it is often desirable that obtain high rigidity with most light quality, hold greatly
The structure of load.To obtain this structure, can select from Optimal Structure Designing, material etc. is carried out the work.
Largely there are various forms of storage tank mounting structures in field of structural design, for aerospace structure field, to light
Matter, high rigidity, carry greatly for storage tank installation topology requirement it is especially urgent.Usual structure include: bar, Liangping plate, shell,
The composite structure of entity and different type structure.
For fixed around common, the mounting structure of centre dress storage tank, current existing mode is mentioned using I-beam
The normal stiffness of high framework；But 5mm cannot be less than by being limited the wing plate of I-beam and web thickness by casting technique, particularly with anti-
Curved rigidity improves efficiency lower web thickness not less than 5mm, and the optimization that cannot achieve Varying-thickness further for different zones is set
It is lower to eventually lead to quality (weight) utilization rate for meter scheme.The some structures separately having design a kind of band pull rod progress support normal
Slab construction, which is the stiffened panel of magnesium alloy machining forming, and the most thin thickness of muscle and plate can arrive 2mm,
Quality (weight) is light compared with casting magnesium part, but whole plate normal stiffness is poor, it is therefore desirable to improve normal stiffness and carrying energy by pull rod
Power increases pull rod and increases assembly technology difficulty, occupied space and then limit its scope of application.
Summary of the invention
The embodiment of the present application is designed to provide a kind of increasing material manufacturing metal skin lattice structure for storage tank installation
And its design method, it is intended to improve existing not being able to satisfy lightweight, high rigidity, asking of carrying greatly for storage tank mounting structure
Topic.
In a first aspect, the application provides a kind of technical solution:
A kind of metal skin lattice structure, metal skin lattice structure include:
Covering and space lattice spherical shell structure, space lattice structure filling is inside covering
Fixed part is provided on the periphery wall of spherical shell structure, and fixed part is arranged on covering；Space lattice structure is used for
Carry object.
Storage tank fills lattice structure in covering, so that the quality of entire metal skin lattice structure reduces, is whole rigid
Degree improves.Fixed part is arranged in the surrounding of spherical shell structure, so that entire metal skin lattice structure is not needed using support normal
Pull rod.The rigidity of entire metal skin lattice structure is higher, bearing capacity is stronger.
In the other embodiments of the application, the incomplete phase of thickness of the covering of the above-mentioned different location positioned at spherical shell structure
Together.
By setting different for the thickness selection of covering, so that structural slab upper stress concentrated area skin thickness increases,
Stress smaller area skin thickness reduces, and finally improves structural bearing efficiency and the structure of phase homogenous quantities is able to bear more
Big load.
In the other embodiments of the application, positioned at the different location of spherical shell structure covering thickness in 0.5mm-
Between 3mm.
Skin thickness can adapt to the stress of spherical shell structure different location between 0.5mm-3mm.
In the other embodiments of the application, space lattice structure includes multiple dot matrix cell elements, each dot matrix cell element is equal
Rod piece including the distribution connection of multiple edge cube body diagonals.
The regularly arranged composition of space lattice structural periodicity, so that the bearing capacity of entire spherical shell structure is uniformly steady
It is fixed.It is easily facilitated using the cube structure dot matrix cell element that multiple rod pieces are formed so that the symmetry of space lattice structure is more preferable
It is filled in covering.
In the other embodiments of the application, spherical shell structure has upper covering, and storage tank is mounted on covering.
Storage tank is mounted on the upper covering of spherical shell structure, can preferably carry storage tank.
In the other embodiments of the application, storage tank is installed interface and is arranged on upper covering.
Storage tank is installed interface and is arranged on upper covering, convenient for the installation of storage tank.
In the other embodiments of the application, multiple structure lifting interfaces are additionally provided on upper covering.
Multiple structure lifting interfaces are arranged on upper covering, convenient for lifting by crane mobile storage tank.
Second aspect, the application provide a kind of technical solution:
A kind of design method of increasing material manufacturing metal skin lattice structure, comprising:
Using Finite Element Method, the covering dot matrix spherical shell structure of different parts skin thickness consecutive variations is obtained；
Covering dot matrix spherical shell structure is manufactured using metal increasing material manufacturing technique；Covering dot matrix spherical shell structure includes covering and sky
Between lattice structure, space lattice structure filling is inside covering；
It is risen in the upper covering of covering dot matrix spherical shell structure using the method processing storage tank installation interface and structure of machining
Hang interface；Structure fixed interface is processed using the method for machining on the periphery wall covering of covering dot matrix spherical shell structure.
The design method of the increasing material manufacturing metal skin lattice structure can obtain lightweight, high rigidity, big carrying spherical shell knot
Structure.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram of metal skin lattice structure provided by the embodiments of the present application；
Fig. 2 is the structural schematic diagram of the dividing body of metal skin lattice structure provided by the embodiments of the present application；
Fig. 3 is the structural schematic diagram of metal skin lattice structure provided by the embodiments of the present application；
Fig. 4 is that A-A locates sectional view in Fig. 3, rotation counterclockwise, at totally 32；
Fig. 5 is that B-B locates sectional view in Fig. 3, rotation counterclockwise, at totally 16；
Fig. 6 is that C-C locates sectional view in Fig. 3, rotation counterclockwise, at totally 4；
Fig. 7 is the space lattice structural schematic diagram of metal skin lattice structure provided by the embodiments of the present application；
Fig. 8 is the dot matrix Cellular structure schematic diagram of metal skin lattice structure provided by the embodiments of the present application, corresponds to Fig. 7
In enlarged drawing at VIII.
Icon: 100- metal skin lattice structure；110- dividing body；The first dividing body of 111-；The second dividing body of 112-；
113- third dividing body；120- covering；The upper covering of 121-；122- storage tank installs interface；123- structure lifts by crane interface；124- structure
Interface is installed；130- space lattice structure；131- dot matrix cell element；132- rod piece.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.The application being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiments herein provided in the accompanying drawings is not intended to limit below claimed
Scope of the present application, but be merely representative of the selected embodiment of the application.Based on the embodiment in the application, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model of the application protection
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the embodiment of the present application, it is to be understood that term " center ", "upper", "lower", "left", "right",
The orientation or positional relationship of the instructions such as "vertical", "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings,
This application product using when the orientation or positional relationship usually put or those skilled in the art usually understand
Orientation or positional relationship, be merely for convenience of description the application and simplify description, rather than the equipment of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.
In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, it is not understood to indicate or imply
Relative importance.
In the description of the embodiment of the present application, it is also necessary to which explanation is unless specifically defined or limited otherwise, term
" setting ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to detachably connect
It connects, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediate matchmaker can also be passed through
Jie is indirectly connected, and can be the connection inside two elements.It for the ordinary skill in the art, can be with concrete condition
Understand the concrete meaning of above-mentioned term in this application.
Embodiment
Fig. 1-Fig. 8 is please referred to, a kind of metal skin lattice structure 100 is present embodiments provided.The metal skin dot matrix knot
Structure 100 includes covering 120 and space lattice structure 130.Space lattice structure 130 is filled in inside covering 120.120 He of covering
Space lattice structure 130 forms spherical shell structure.
Storage tank fills lattice structure in covering, so that the quality of entire metal skin lattice structure reduces, is whole rigid
Degree improves.Fixed part is arranged in the surrounding of spherical shell structure, so that entire metal skin lattice structure is not needed using support normal
Pull rod.The rigidity of entire metal skin lattice structure is higher, bearing capacity is stronger.
Further, fixed part is provided on the periphery wall of spherical shell structure, and fixed part is arranged on covering 120；Space
Lattice structure 130 is for carrying storage tank.
Specifically, the structure of 100 entirety of metal skin lattice structure is in spherical shell structure, set in the surrounding of spherical shell structure
Fixed part is set, so that entire metal skin lattice structure 100 is by the fixation of surrounding, it is in clamped state, storage tank to be lifted is set
It sets in the inside of spherical shell structure.Apply storage tank among periphery is fixed.
Since by the way of periphery fixed, which does not need the pull rod using support normal.
When carrying, it is mounted on intermediate storage tank overload and spherical shell near installation point is transmitted to by the storage tank installation point among spherical shell structure
Upper covering and lower covering, are then transmitted to spherical shell periphery fixed point by upper covering and lower covering.Entire metal skin dot matrix knot
The rigidity of structure 100 is higher, bearing capacity is stronger.
Illustratively, in one specific embodiment of the application, applicant uses and is separated into the method welded after muti-piece
It is prepared for metal skin lattice structure 100 provided by the present application.
It should be understood that the metal skin lattice structure can also be using whole in the application in other optional embodiments
The method of processing manufactures.
Further, referring to Fig. 3, in the application optional embodiment, metal skin lattice structure 100 includes multiple points
Cut body 110.Specifically, above-mentioned multiple dividing bodies 110 include three groups, three groups of dividing bodies 110 are respectively the first dividing body
111, the second dividing body 112 and third dividing body 113, the first dividing body 111 and the second dividing body 112 are located at spherical shell structure
Edge.Every group of dividing body 110 includes two, and one in the first dividing body 111 and one in the second dividing body 112
It is adjacent.Each third dividing body 113 is adjacent with first dividing body 111 and second dividing body 112 simultaneously, and two
Third dividing body 113 is adjacent.
Further, volume of the volume less than the second dividing body 112 of the first above-mentioned dividing body 111, the second dividing body
112 volume is less than the volume of third dividing body 113.
Further, referring to Fig. 3, first dividing body 111 and second dividing body 112 are adjacent positioned at spherical shell structure
An end margin, the adjacent another end edge for being located at spherical shell structure of another first dividing body 111 and another second dividing body 112
Edge, two third dividing bodies 113 are between this both ends.I.e. relative to the first dividing body 111 and the second dividing body 112, third
Dividing body 113 is located at the middle position of entire spherical shell structure.Since the volume of third dividing body 113 is larger, by third dividing body
113 are arranged in the middle position of spherical shell structure, can obtain bigger bearing capacity.
It should be understood that in other optional embodiments of the application, the quantity of above-mentioned multiple dividing bodies 110 and arrangement side
Formula can select other set-up modes according to the actual situation.
Further, the position distribution of above-mentioned first dividing body 111, the second dividing body 112 and third dividing body 113,
Convenient for be arranged according to the stress condition of entire spherical shell structure different zones each dividing body 110 covering 120 thickness.
Specifically, in the application optional embodiment, positioned at the thickness of the covering 120 of the different location of spherical shell structure
It is not exclusively same.
Further, the thickness positioned at the covering 120 of the different location of spherical shell structure is between 0.5mm-3mm.
Illustratively, in one optional embodiment of the application, above-mentioned the first dividing body 111 and the second dividing body 112
The thickness selection of covering 120 be designed as 0.5mm, the thickness selection of the covering 120 of above-mentioned third dividing body 113 is designed as
0.5-1.8mm.Thickness d=1.8mm of the covering 120 of third dividing body 113 is illustratively given referring to Fig. 2, Fig. 2.
It should be understood that in other optional embodiments of the application, the first above-mentioned dividing body 111, the second dividing body 112 with
And the thickness of the covering 120 of third dividing body 113 can select to be arranged according to the actual needs.
By setting different for the thickness selection of the covering 120 of different dividing bodies 110, so that structural slab upper stress collection
Middle 120 thickness of region covering increases, and 120 thickness of stress smaller area covering reduces, and finally improves structural bearing efficiency and makes
The structure for obtaining phase homogenous quantities (weight) is able to bear bigger load.
Further, the entire spherical shell structure of above-mentioned formation has upper covering 121, and storage tank is mounted on covering.
It should be noted that the upper covering 121 of the entire spherical shell structure of above-mentioned formation is each by multiple dividing bodies 110 respectively
From upper covering block be spliced to form.
In other optional embodiments of the application, the entire spherical shell structure of above-mentioned formation has upper covering 121 can also be with
Selection is arranged on spherical shell structure using whole upper covering.
Further, the shape of above-mentioned covering 120 does not limit, and can select according to the actual needs.
Illustratively, in the application optional embodiment, referring to Fig. 2, the shape selection of above-mentioned covering 120 is set as
Arc, it is whole in spherical, it is distributed in the outer surface of entire spherical shell structure.
In other optional embodiments of the application, the shape of above-mentioned covering 120, which also can choose, is set as other shapes
Shape, such as polygon etc..
Further, multiple storage tank installation interfaces 122 are provided on the upper covering 121 of spherical shell structure.Still optionally further,
Multiple storage tank installation interfaces 122 are located at the middle position of covering 121 on entire spherical shell structure, so as to fully play spherical shell
The carrying of the space lattice structure 130 of inside configuration acts on.
It should be understood that the above-mentioned storage tank installation specific quantity of interface 122 and arrangement mode were installed according to actual needs
The shape and structure of storage tank selects setting.
Illustratively, referring to Fig. 3-6, in the application optional embodiment, storage tank installs interface 122 including two groups, two
Group storage tank installation interface 122 is separately positioned on a third dividing body 113, and each group of storage tank installation interface 122 includes 32
A mounting hole annularly respectively.
Further, multiple structure lifting interfaces 123 are additionally provided on the upper covering 121 of spherical shell structure.
Interface 123 is lifted by crane by the way that multiple structures are arranged on the upper covering 121 of spherical shell structure, easily will can entirely be stored up
Case lifting movement.
Illustratively, multiple structures lifting interface 123 on the upper covering 121 of above-mentioned spherical shell structure is evenly distributed on ball
On the upper covering 121 of shell structure.For example, referring to Fig. 1, it includes 4 that structure, which lifts by crane interface 123, is separately positioned on spherical shell structure side
On two the first dividing bodies 111 of edge and two the second dividing bodies 112.
It should be understood that in other optional embodiments of the application, the quantity of above-mentioned multiple structures lifting interface 123 and
Distribution mode can also select to be set as other quantity and other distribution modes according to the actual needs.
Further, the fixed part being arranged on the periphery wall of spherical shell structure includes multiple structure mounting interfaces 124, is uniformly divided
Surrounding of the cloth in spherical shell structure.So as to which spherical shell structure is fixed from periphery.
By storage tank be mounted on storage tank installation interface 122 when, due to entire metal skin lattice structure 100 be it is circumferentially fixed,
The acceleration overload of storage tank installs interface 122 by storage tank and is transmitted to neighbouring covering (covering of the dividing body of storage tank installation),
Then structure mounting interface 124 is transmitted to by remaining covering.
Illustratively, it in the application optional embodiment, referring to Fig. 3, is evenly distributed on the periphery wall of spherical shell structure
16 structure mounting interfaces 124, by this 16 structure mounting interfaces 124 by entire metal skin lattice structure 100 from periphery
It is fixed.
In other optional embodiments of the application, the quantity and distribution form of above-mentioned fixed part can be according to reality
It needs to select other modes.
Further, space lattice structure 130 includes multiple dot matrix cell elements 131, each dot matrix cell element includes multiple
Along a cube rod piece 132 for body diagonal distribution connection.
In the application optional embodiment, referring to Fig. 7-8, the bar of above-mentioned multiple edge cube body diagonals distribution connection
Part 132 selects side length for the cube of 10mm, and 132 diameter of rod piece is 0.5mm.
Space lattice structure 130 is in each regularly arranged composition of 110 periodically of dividing body, so that each point
The integrated carrying ability for cutting body 110 is uniform and stable.The cube structure dot matrix cell element 131 formed using multiple rod pieces 132, so that
The symmetry of space lattice structure 130 is more preferable, easily facilitates and fills in each dividing body 110.
Space lattice structure 130 can be effectively reduced the quality of entire metal skin lattice structure 100, and improve whole
The rigidity and bearing capacity of a metal skin lattice structure 100.
In other optional embodiments of the application, above-mentioned dot matrix cell element 131 can choose other kinds of dot matrix knot
Structure cell element.For example, the diagonal line along common face-centred cubic structure or body-centered cubic structure is distributed what the rod piece connected was formed
Lattice structure cell element.
Illustratively, reference Fig. 3, the self weight 14.0kg of this metal skin lattice structure 100 provided by the above embodiment,
Under one week 16 clamped state of point, centre, which is able to bear maximum and is carried as 1.68 × 105N, (is equivalent to the storage of 1.68 × 104kg
Case weight)；140kg storage tank is installed in centre, only the fundamental frequency under one week 16 clamped state of point reach 89Hz (without
The pull rod of support normal).
100 bearing capacity of metal skin lattice structure provided by the present application is high, the rigidity of structure is big, and structure own wt
Gently, Aeronautics and Astronautics construction applications be can be widely applied for.
Other optional embodiments of the application additionally provide a kind of design method of increasing material manufacturing metal skin lattice structure,
Include:
Using Finite Element Method, the covering dot matrix spherical shell structure of different parts skin thickness consecutive variations is obtained；
Covering dot matrix spherical shell structure is manufactured using metal increasing material manufacturing technique；Covering dot matrix spherical shell structure includes covering and sky
Between lattice structure, space lattice structure filling is inside covering；
It is risen in the upper covering of covering dot matrix spherical shell structure using the method processing storage tank installation interface and structure of machining
Hang interface；Structure fixed interface is processed using the method for machining on the periphery wall covering of covering dot matrix spherical shell structure.
In the application optional embodiment, multiple dividing bodies are made using metal increasing material manufacturing technique；Wherein, each
Dividing body includes covering and space lattice structure, and multiple dividing bodies are welded to be formed by space lattice structure filling inside covering
Spherical shell structure；
Still optionally further, multiple dividing bodies are prepared using selective laser molten metal increasing material manufacturing mode.
Still optionally further, use AlSi10Mg metal powder for raw material manufacture spherical shell structure space lattice structure and
Covering.
In other optional embodiments of the application, it also can choose this field other applicable aluminium alloy, titanium alloys etc.
Metal powder.For example, Ti6Al4V metal powder.
Further, using Finite Element Method, the covering dot matrix ball of different parts skin thickness consecutive variations is obtained
The specific steps of shell structure are such that
1) it establishes the solid finite meta-model based on hexahedral element and carries out the topological optimization based on density variable method, find knot
The optimal material of structure is distributed, and specific optimization method is that fundamental frequency is not less than 85Hz for constraint, the density conduct of every individual cell
Design variable, design variable variable range are 0~1, and global finite element model weight is most gently optimization aim；Optimum results show
Taking can be improved rigidity and bearing capacity with the structure of spherical shell covering connecting inner filling dot matrix and efficiently mitigates structure weight
Amount.2) finite element model of covering and internal one-dimensional beam element simulation dot matrix based on triangle and quadrangle shell unit is established,
Skin thickness optimal distribution is found, specific optimization method is that fundamental frequency is not less than 85Hz for constraint, the thickness of each shell unit
As design variable, consider that the thickness of shell elements design variable variable range of manufacturing constraints is 0.5mm~3mm, global finite element
Model weight is most gently optimization aim；Optimum results are the covering dot matrix spherical shell of different parts skin thickness consecutive variations.
The design method of the increasing material manufacturing metal skin lattice structure can obtain lightweight, high rigidity, big carrying spherical shell knot
Structure.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (8)
1. a kind of metal skin lattice structure, which is characterized in that the metal skin lattice structure includes:
Covering and space lattice structure, the space lattice structure filling is inside the covering；The covering and the space
Lattice structure forms spherical shell structure；
Fixed part is provided on the periphery wall of the spherical shell structure, and the fixed part is arranged on the covering；The space
Lattice structure is for carrying storage tank.
2. metal skin lattice structure according to claim 1, which is characterized in that
Thickness positioned at the covering of the different location of the spherical shell structure is not exactly the same.
3. metal skin lattice structure according to claim 2, which is characterized in that
Positioned at the different location of the spherical shell structure the covering thickness between 0.5mm-3mm.
4. metal skin lattice structure according to claim 1-3, which is characterized in that
The space lattice structure includes multiple dot matrix cell elements, each described dot matrix cell element includes multiple diagonal along cube
The rod piece of line distribution connection.
5. metal skin lattice structure according to claim 1, which is characterized in that
The spherical shell structure has upper covering, and the storage tank is mounted on the upper covering.
6. metal skin lattice structure according to claim 5, which is characterized in that
The storage tank installation interface is arranged on the upper covering.
7. metal skin lattice structure according to claim 5, which is characterized in that
Multiple structure lifting interfaces are additionally provided on the upper covering.
8. a kind of design method of increasing material manufacturing metal skin lattice structure characterized by comprising
Using Finite Element Method, the covering dot matrix spherical shell structure of different parts skin thickness consecutive variations is obtained；
The covering dot matrix spherical shell structure is manufactured using metal increasing material manufacturing technique；The covering dot matrix spherical shell structure includes covering
With space lattice structure, the space lattice structure filling is inside the covering；
It is risen in the upper covering of the covering dot matrix spherical shell structure using the method processing storage tank installation interface and structure of machining
Hang interface；It is connect on the periphery wall covering of the covering dot matrix spherical shell structure using the method processing structure fixation of machining
Mouthful.
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Cited By (1)
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| CN112881128A (en) * | 2021-02-04 | 2021-06-01 | 航天科工防御技术研究试验中心 | Tensile sample for additive manufacturing lattice structure material and tensile test method |
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| CN112881128B (en) * | 2021-02-04 | 2023-03-21 | 航天科工防御技术研究试验中心 | Tensile sample for additive manufacturing lattice structure material and tensile test method |
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