Film plate, optimization method thereof and film container

Abstract

The invention discloses a film plate and an optimization method thereof and a film container, the film plate comprises a plate body, the plate body is provided with a first corrugated structure, a second corrugated structure and at least one intersecting curved surface, the first corrugated structure is arranged in a convex manner, the second corrugated structure is arranged in a concave manner, and the first corrugated structure and the second corrugated structure are arranged in an intersecting manner through the intersecting curved surface; wherein a design curved surface is defined, the design curved surface is of a curved surface structure formed in the mode that the first convex curve translates along the first concave curve and the vertex of the first convex curve slides on the first concave curve, the first corrugated structure and the second corrugated structure can penetrate through the design curved surface, and an intersecting curved surface is defined by intersecting lines. The corrugated structure and the intersecting curved surface are matched together to improve the displacement compensation capacity of the film plate, and the liquid tightness and the air tightness of the film container can be improved; the plate body is low in ductility, small in forming thinning amount and small in residual stress; the design and manufacturing cost and difficulty are reduced, and the forming precision is easy to control; and the performance optimization of the thin film plate can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of cryogenic storage tanks, and in particular to a film plate and an optimization method thereof, and a film container. Background Art

[0002] Film containers, such as film tanks, as a kind of cryogenic storage tanks, can contain cryogenic liquid hydrogen, cryogenic liquid oxygen, cryogenic LNG, cryogenic ethylene, cryogenic ethane, cryogenic liquid ammonia, cryogenic propane, cryogenic propylene, cryogenic butane and other liquids at nearly normal pressure.

[0003] Membrane tanks generally have three core structures: an outer tank with greater strength and rigidity, a flexible inner tank made of metal film, and an insulating support material between the inner and outer tanks; the outer tank is mainly responsible for supporting the tank body and ensuring the strength and rigidity of the storage tank; the insulating material is responsible for transferring the load of the inner tank film to the outer tank, and is responsible for isolating the heat transfer between the medium and the outside world; the flexible inner tank is responsible for ensuring the liquid tightness of the membrane tank, and the membrane plate is one of the key components used to construct the flexible inner tank.

[0004] When the material of the film plate of the flexible inner tank is selected from materials with a large linear expansion coefficient such as stainless steel, it is necessary to consider the adverse effects of temperature difference, static hydraulic pressure, dynamic hydraulic pressure and other loads on the metal material, which may cause the film plate to produce shrinkage, stretching, instability and other adverse effects. Therefore, it is necessary to design a plate-like structure with multiple arched waves to deal with the above problems.

[0005] In the prior art, the arched waves on a part of the film plates are discontinuous arched waves, that is, the intersecting positions of the two waves cannot be connected. During the press processing, the ends of each arched wave can only be formed by stretching the material, thereby increasing the forming thinning amount, elongation and residual stress of the material. In addition, the position where the corrugation is disconnected is both the position of stress concentration and the position of the largest thinning amount, resulting in a superposition of leakage risks. In addition, the arched waves on a part of the film plates are mutually orthogonal arched waves, and a complex pleated structure is formed at the intersection. Therefore, the design and manufacturing costs are high and the difficulty is great, and the forming accuracy is difficult to quantitatively control. Summary of the invention

[0006] The purpose of the present invention is to provide a film plate and its optimization method and a film container, so as to solve the technical problems that the current film plate using discontinuous arch waves will increase the material's molding thinning amount, elongation, residual stress and cause the superposition of leakage risks, and solve the technical problems that the current film plate using orthogonal arch waves The wrinkle structure formed at the intersection will cause high design and manufacturing costs, great difficulty, and difficult to control the molding accuracy.

[0007] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0008] The present invention provides a thin film plate, on which a first corrugated structure, a second corrugated structure and at least one intersecting curved surface are provided, wherein the first corrugated structure is convexly arranged and the second corrugated structure is concavely arranged, and the first corrugated structure and the second corrugated structure are cross-arranged through the intersecting curved surface; wherein a designed curved surface is defined, and the designed curved surface is a curved surface structure formed by a first convex curve translating along a first concave curve and the vertex of the first convex curve sliding on the first concave curve, and the first corrugated structure and the second corrugated structure can intersect with the designed curved surface, and the intersecting lines enclose to form the intersecting curved surface.

[0009] In an embodiment of the present invention, both the first convex curve and the first concave curve are curves that can be fitted by Taylor's formula.

[0010] In an embodiment of the present invention, the first convex curve is any one of a parabola, a catenary, a circular arc, a trigonometric function curve, an inverse trigonometric function curve, an exponential function curve, a logarithmic function curve and a spline curve, and / or a combination of at least two thereof, and the first concave curve is any one of a parabola, a catenary, a circular arc, a trigonometric function curve, an inverse trigonometric function curve, an exponential function curve, a logarithmic function curve and a spline curve, and / or a combination of at least two thereof.

[0011] In an embodiment of the present invention, the first convex curve and the first concave curve are both parabolas, and the intersecting curved surface is a hyperbolic parabola.

[0012] In an embodiment of the present invention, the first corrugated structure and the second corrugated structure are arranged orthogonally or obliquely.

[0013] In an embodiment of the present invention, the first corrugated structure includes at least one first corrugation and at least one second corrugation connected to the intersecting curved surface, the second corrugated structure includes at least one third corrugation and at least one fourth corrugation connected to the intersecting curved surface, the first corrugation is a curved surface structure formed by translating the second convex curve along the first directrix, the second corrugation is a curved surface structure formed by translating the third convex curve along the second directrix, the third corrugation is a curved surface structure formed by translating the second concave curve along the third directrix, and the fourth corrugation is a curved surface structure formed by translating the third concave curve along the fourth directrix.

[0014] In an embodiment of the present invention, the second convex curve and the third convex curve are both the same as the first convex curve; the second concave curve and the third concave curve are both the same as the first concave curve.

[0015] In an embodiment of the present invention, the first directrix is ​​a straight line or a curve located in a first plane parallel to the plate body; the second directrix is ​​a straight line or a curve located in a second plane parallel to the plate body; the third directrix is ​​a straight line or a curve located in a third plane parallel to the plate body; the fourth directrix is ​​a straight line or a curve located in a fourth plane parallel to the plate body.

[0016] In an embodiment of the present invention, the first plane and the second plane are the same plane; the third plane and the fourth plane are the same plane.

[0017] In an embodiment of the present invention, the first corrugated structure is a corrugated structure with equal width extension; or the first corrugated structure includes corrugated sections with a gradually contracting extension or a gradually expanding extension; the second corrugated structure is a corrugated structure with equal width extension; or the second corrugated structure includes corrugated sections with a gradually contracting extension or a gradually expanding extension.

[0018] In an embodiment of the present invention, the span range of the first corrugated structure and the second corrugated structure are both 1 mm to 1000 mm.

[0019] In an embodiment of the present invention, the convex height range of the first corrugated structure and the concave depth range of the second corrugated structure are both 1 mm to 500 mm.

[0020] In an embodiment of the present invention, the thickness of the plate body ranges from 0.1 mm to 10 mm.

[0021] The present invention provides a method for optimizing a thin film plate, which is used to optimize the above-mentioned thin film plate, comprising the following steps: adjusting optimization parameters to change the structural parameters of the thin film plate; wherein the optimization parameters are at least one parameter in the mathematical expression of the first corrugated structure, the second corrugated structure and the intersecting surface; obtaining the performance parameters of the thin film plate; repeating the above steps until the performance parameters reach a preset value.

[0022] In an embodiment of the present invention, the mathematical expression of the intersecting surface is a mathematical equation of a hyperbolic parabola, and the optimization parameter includes at least one constant of the mathematical expression of the intersecting surface.

[0023] In an embodiment of the present invention, the structural parameters include the size, shape, curvature, peak height, valley depth and / or maximum span of the first corrugated structure, the second corrugated structure and the intersecting curved surface.

[0024] In an embodiment of the present invention, the performance parameters include the displacement compensation capability, strength, fatigue performance and / or progressive deformation performance of the first corrugated structure, the second corrugated structure and the intersecting curved surface.

[0025] In an embodiment of the present invention, obtaining the performance parameters of the thin film plate includes the following steps: establishing a three-dimensional model of the thin film plate based on the adjusted optimization parameters and the mathematical expression of the intersecting surfaces; and obtaining its performance parameters using simulation calculations of the three-dimensional model of the thin film plate.

[0026] In an embodiment of the present invention, after the performance parameter reaches a preset value, the following steps are further included: determining the optimization parameter based on the final adjustment and the target mathematical expression of the intersecting surface.

[0027] The present invention also provides a film container, comprising at least one of the above-mentioned film plates.

[0028] The characteristics and advantages of the present invention are:

[0029] The film plate and film container of the present invention are provided with a relatively convex first corrugated structure and a relatively concave second corrugated structure and an intersecting curved surface connecting the first corrugated structure and the second corrugated structure on the plate body, and by defining a design curved surface defined by a convex curve and a concave curve, the first corrugated structure and the second corrugated structure intersect with the design curved surface to form an intersecting curved surface. On the one hand, the first corrugated structure, the second corrugated structure and the intersecting curved surface can cooperate with each other to improve the displacement compensation ability of the film plate, thereby being beneficial to improving the liquid tightness and air tightness of the film container; on the other hand, it is beneficial to reduce the elongation of the plate body when the intersecting curved surface is pressed, the thinning amount of forming is small, and the residual stress is small, so that the structural size is stable after the finalization; on the other hand, the design curved surface can be limited by limiting the concave curve and the convex curve, and then the intersecting curved surface can be limited, so that it is convenient to optimize the performance of the engineering structure by adjusting the parameters of the mathematical expression, and it is convenient to realize mold processing and press-forming manufacturing of the film plate, so it is beneficial to reduce the cost and difficulty of design and manufacturing, and the molding accuracy is easy to control.

[0030] The optimization method of the film plate of the present invention utilizes at least one parameter in the mathematical expression of the first corrugated structure, the second corrugated structure and the intersecting surface as an optimization parameter, and changes the structural parameters of the film plate by adjusting the optimization parameter, thereby optimizing the performance of the film plate and making the performance of the film plate meet the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1is a three-dimensional schematic diagram of a film plate in Embodiment 1 of the present invention;

[0033] Figure 2 Schematic diagram of the relationship between the designed curved surface and the first convex curve and the first concave curve in the first embodiment of the present invention;

[0034] Figure 3 Schematic diagram of the relationship between the intersecting curved surfaces and the intersection line in the first embodiment of the present invention;

[0035] Figure 4 is a top view of the film plate in the first embodiment of the present invention;

[0036] Figure 5 is a side view of the film plate in the first embodiment of the present invention;

[0037] Figure 6 It is a front view of the film plate in the first embodiment of the present invention;

[0038] Figure 7 is a three-dimensional schematic diagram of a film plate in the second embodiment of the present invention;

[0039] Figure 8 is a top view of the film plate in the third embodiment of the present invention;

[0040] Fig. 9 is a three-dimensional schematic diagram of intersecting curved surfaces in Embodiment 3 of the present invention;

[0041] Fig.10 is a three-dimensional schematic diagram of a film plate in a fourth embodiment of the present invention;

[0042] Fig.11 is a three-dimensional schematic diagram of a film plate in Embodiment 5 of the present invention;

[0043] Fig.12 is a three-dimensional schematic diagram of a film plate in Embodiment 6 of the present invention;

[0044] Fig.13 is a three-dimensional schematic diagram of the designed curved surface of the film plate in the sixth embodiment of the present invention;

[0045] Fig.14 is a three-dimensional schematic diagram of intersecting curved surfaces in Embodiment 6 of the present invention;

[0046] Fig.15 is a three-dimensional schematic diagram of a film plate in Embodiment 7 of the present invention;

[0047] Fig.16 A schematic diagram of optimizing the design of intersecting surfaces in the present invention;

[0048] Fig.17 A partial schematic diagram of the film container of the present invention. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Implementation Method 1

[0051] Combination Figure 1 , Figure 2 as well as Figure 3 As shown, the present invention provides a thin film plate 100, including a plate body 1, on which a first corrugated structure 2, a second corrugated structure 3 and at least one intersecting curved surface 4 are provided, the first corrugated structure 2 is convexly arranged, the second corrugated structure 3 is concavely arranged, and the first corrugated structure 2 and the second corrugated structure 3 are cross-arranged through the intersecting curved surface 4; wherein, a designed curved surface 5 is defined, the designed curved surface 5 is a curved surface structure formed by the first convex curve A1 translating along the first concave curve B1 and the vertex of the first convex curve A1 sliding on the first concave curve B1, the first corrugated structure 2 and the second corrugated structure 3 can intersect with the designed curved surface 5, and the intersection line X encloses the intersecting curved surface 4.

[0052] Since the intersection line formed by the intersection of the first corrugated structure 2 and the second corrugated structure 3 with the designed curved surface 5 is the intersection line X, the intersection line X between the first corrugated structure 2 and the second corrugated structure 3 and the designed curved surface 5 is the outer contour line of the intersecting curved surface 4; wherein, the first corrugated structure 2 intersects with the designed curved surface 5 along the direction of the tangent Q2 at the vertex of the first concave curve B1, and the second corrugated structure 3 intersects with the designed curved surface 5 along the direction of the tangent Q1 at the vertex of the first convex curve A1, so that the displacement compensation capabilities of the first corrugated structure 2, the second corrugated structure 3 and the intersecting curved surface 4 can be coordinated more.

[0053] It should be noted that the present invention defines the design curved surface 5 formed by the first convex curve A1 translating along the first concave curve B1 and the vertex of the first convex curve A1 sliding on the first concave curve B1, only for the purpose of clearly describing the shape of the structure of the intersecting curved surface 4 possessed by the film plate 100 of the present invention, and the design curved surface 5 is not the structure possessed by the film plate 100 of the present invention. Moreover, the intersecting curved surface 4 having the same shape but described in different ways should also be within the protection scope of the present invention.

[0054] In addition, the first corrugated structure 2 and the second corrugated structure 3 are not limited to corrugated structures that must bend and extend in a specific direction. Instead, for the convenience of description, two corrugated structures extending in different directions and bending in opposite directions relative to the plate body 1 are defined as the first corrugated structure 2, such as the peak structure from the perspective of the figure; and the other is positioned as the second corrugated structure 3, such as the trough structure from the perspective of the figure.

[0055] Specifically, the first corrugated structure 2 includes at least one first corrugation 21 and at least one second corrugation 22, which are the same or different, formed by the translation of at least one convex curve along at least two directrixes, and the at least first corrugation 21 and at least the second corrugation 22 are connected by at least one intersecting curved surface 4. The second corrugated structure 3 includes at least one third corrugation 31 and at least one fourth corrugation 32, which are the same or different, formed by the translation of at least one concave curve along at least two directrixes, and the at least one third corrugation 31 and at least one fourth corrugation 32 are connected by at least one intersecting curved surface 4. The first corrugation 21 and the second corrugation 22 intersect with the design curved surface 5 along the direction of the tangent Q2 at the vertex of the first concave curve B1 to form a first intersecting line X1 and a second intersecting line X2 connected thereto, and the third corrugation 31 and the third corrugation 32 intersect with the design curved surface 5 along the direction of the tangent Q1 at the vertex of the first convex curve A1 to form a third intersecting line X3 and a fourth intersecting line X4 connected thereto.

[0056] The thin film plate 100 of the present invention is provided with a relatively convex first corrugated structure 2 and a relatively concave second corrugated structure 3 on the plate body 1, and an intersecting curved surface 4 connecting the first corrugated structure 2 and the second corrugated structure 3, and a design curved surface 5 defined by a convex curve A1 and a concave curve B1 is defined, and the first corrugated structure 2 and the second corrugated structure 3 intersect with the design curved surface 5 to form the intersecting curved surface 4. On the one hand, the first corrugated structure 2, the second corrugated structure 3 and the intersecting curved surface 4 can cooperate with each other to improve the displacement compensation capability of the thin film plate 100, thereby It is beneficial to improve the liquid tightness and air tightness of the film container; on the other hand, it is beneficial to reduce the elongation of the plate body 1 when the intersecting surface 4 is pressed, the thinning amount is small, and the residual stress is small, so that the structural size is stable after finalization; on the other hand, the concave curve and convex curve of the design surface 5 can be limited to the intersecting surface 4, so as to optimize the performance of the engineering structure by adjusting the parameters of the mathematical expression, and to facilitate mold processing and press-forming manufacturing of the film plate, so it is beneficial to reduce the cost and difficulty of design and manufacturing, and the molding accuracy is easy to control.

[0057] Combination Figure 2 and Figure 3 As shown, in the embodiment of the present invention, the intersecting curved surface 4 and the designed curved surface 5 can be completely the same, that is, the intersection line X between the first corrugated structure 2 and the second corrugated structure 3 and the designed curved surface 5 is the outer contour line of the designed curved surface 5. Of course, the intersecting curved surface 4 can also be a part of the designed curved surface 5.

[0058] The plate body 1 is generally a flat plate. The shape of the plate body 1 is not specifically limited; it can be set to a square as in the embodiment of the present invention; it can also be set to a rectangle, trapezoid, triangle, arc or other shapes as in other embodiments of the present invention. Specifically, the thickness of the plate body 1 ranges from 0.1 mm to 10 mm, preferably from 0.1 mm to 3 mm.

[0059] Combination Figure 4 , Figure 5 and Figure 6 As shown, in the embodiment of the present invention, the center point O1 of the intersecting curved surface 4, that is, the intersection point where the vertex of the convex curve A1 and the vertex of the concave curve B1 intersect, can be set flush with the plane reference point O2 of the plate body 1, so that when the intersecting curved surface 4 is pressed and formed on the plate body 1, the elongation is small, the forming thinning amount is small, the residual stress is small, and the structural size of the intersecting curved surface 4 is more stable after being formed. Of course, there can also be a height difference.

[0060] For the convex curve defining the first corrugated structure 2 and the concave curve defining the second corrugated structure 3, the intersection angle between the first corrugated structure 2 and the third corrugated structure 3, and the distribution angle between the multiple corrugations in the first corrugated structure 2 and the distribution angle between the multiple corrugations in the second corrugated structure 3 may not be specifically limited, and it is only necessary to make the multiple corrugations of the first corrugated structure 2 and the multiple corrugations of the second corrugated structure 3 intersect with the intersecting curved surface 4. For example, the first corrugated structure 2 and the second corrugated structure 3 are corrugated structures extending in two straight directions, and the first corrugated structure 2 and the second corrugated structure 3 may be arranged orthogonally, generally in the shape of a "cross", or may be arranged obliquely, generally in the shape of an "X".

[0061] Furthermore, the number of corrugations of the first corrugated structure 2, the number of corrugations of the second corrugated structure 3, and the number of intersecting curved surfaces 4 on the plate body 1 may not be specifically limited, as long as a first corrugation 21, a second corrugation 22 of the first corrugated structure 2, and a third corrugation 31 and a fourth corrugation 32 of the second corrugated structure 3 are connected to an intersecting curved surface 4. The number of corrugations of the first corrugated structure 2 and the number of corrugations of the second corrugated structure 3 may be the same, for example, two respectively, the two corrugations of the first corrugated structure 2 are arranged in one direction and connected to an intersecting curved surface 4, and the two corrugations of the second corrugated structure 3 are arranged in another direction and connected to the intersecting curved surface 4. The number of corrugations in the first corrugated structure 2 and the number of corrugations in the second corrugated structure 3 may also be different and cross-shaped in a grid shape. For example, the three corrugations of the first corrugated structure 2 are arranged in one direction and connected by two intersecting curved surfaces 4, and the four corrugations of the second corrugated structure 3 are grouped in pairs, and the two groups of corrugations are connected to the two intersecting curved surfaces 4; for another example, the four corrugations of the first corrugated structure 2 are arranged in one direction and connected by three intersecting curved surfaces 4, and the six corrugations of the second corrugated structure 3 are grouped in pairs, and the three groups of corrugations are connected to the three intersecting curved surfaces 4.

[0062] Specifically, the first corrugation 21 is a curved surface structure formed by the translation of the second convex curve A2 along the first directrix Z1, the second corrugation 22 is a curved surface structure formed by the translation of the third convex curve A3 along the second directrix Z2, the third corrugation 31 is a curved surface structure formed by the translation of the second concave curve B2 along the third directrix Z3, and the fourth corrugation 32 is a curved surface structure formed by the translation of the third concave curve B3 along the fourth directrix Z4.

[0063] Among them, the second convex curve A2 and the third convex curve A3 can be the same or different, and the second convex curve A2 and the third convex curve A3 can be the same as the first convex curve A1 or different; similarly, the second concave curve B2 and the third concave curve B3 can be the same or different, and can be the same as the first concave curve B1 or different.

[0064] Among them, the first directrix Z1 and the second directrix Z2 may be the same or different; similarly, the third directrix Z3 and the fourth directrix Z4 may be the same or different; in addition, the first directrix Z1 may be a straight line or a curve located in a first plane parallel to the plate body 1; the second directrix Z2 may be a straight line or a curve located in a second plane parallel to the plate body 1; the third directrix Z3 may be a straight line or a curve located in a third plane parallel to the plate body 1; the fourth directrix Z4 may be a straight line or a curve located in a fourth plane parallel to the plate body 1. Moreover, the first plane and the second plane may be the same plane, or may be two planes with a height difference above the plate body 1; similarly, the third plane and the fourth plane may be the same plane, or may be two planes with a height difference below the plate body 1. Therefore, the extension lengths of the first corrugation 21, the second corrugation 22, the third corrugation 31 and the fourth corrugation 32 may be specifically defined, and may be the same or different.

[0065] Specifically, the span range (i.e., the crest or trough width) of the first corrugated structure 2 and the second corrugated structure 3 are both 1 mm to 1000 mm. The height of the first corrugated structure 2 protruding relative to the plate body 1 (i.e., the crest height) and the depth of the second corrugated structure 3 recessed relative to the plate body 1 (i.e., the trough depth) are both 1 mm to 500 mm.

[0066] In addition, the first corrugated structure 2 can be a corrugated structure with equal width extension, that is, the convex curve of the first corrugated structure 2 is limited to a constant span during the translation process; the first corrugated structure 2 can also include a corrugated segment with a gradually contracting extension or a gradually expanding extension, that is, the convex curve of the first corrugated structure 2 is limited to a gradually decreasing or increasing span during the translation process to form a gradually changing corrugated segment; similarly, the second corrugated structure 3 can be a corrugated structure with equal width extension, that is, the concave curve of the second corrugated structure 3 is limited to a constant span during the translation process; or the second corrugated structure 3 includes a corrugated segment with a gradually contracting extension or a gradually expanding extension, that is, the concave curve of the second corrugated structure 3 is limited to a gradually decreasing or increasing span during the translation process to form a gradually changing corrugated segment.

[0067] In an embodiment of the present invention, in order to avoid stress concentration at the connection between the intersecting curved surface 4 and the first corrugated structure 2 and the second corrugated structure 3, the intersecting curved surface 4 is connected to the first corrugation 21 and the second corrugation 22 through a first transition curved surface, and the intersecting curved surface 4 is connected to the third corrugation 31 and the third corrugation 32 through a second transition curved surface. Specifically, the first transition curved surface includes a first arc transition surface, and the second transition curved surface includes a second arc transition surface, wherein the first arc transition surface can be a curved surface structure formed by convex curve A1 translated along an arc, and the second arc transition surface can be a curved surface structure formed by concave curve B1 translated along an arc. The two ends of the intersecting curved surface 4 in the direction of the tangent Q2 are connected to the first corrugation 21 and the second corrugation 22 through two first arc transition surfaces. The two ends of the intersecting curved surface 4 in the direction of the tangent Q1 are connected to the third corrugation 31 and the fourth corrugation 32 through two second arc transition surfaces.

[0068] Whether it is the concave curve and the convex curve that define the intersecting surface 4, or the convex curve that defines the first corrugated structure 2 and the convex curve that defines the second corrugated structure 3, they may not be specifically defined. However, in order to facilitate processing and design, the present invention provides some mathematical description methods, so that mathematical expressions can be used to accurately describe the intersecting surface 4, the first corrugated structure 2 and the second corrugated structure 3, so that the intersecting surface 4, the first corrugated structure 2 and the second corrugated structure 3 can be accurately processed according to the mathematical expressions. The structure of the film plate 100 can also be adjusted by adjusting the parameters in the mathematical expressions, thereby optimizing the performance of the film plate 100, which is beneficial to modeling, stress analysis, structural design, theoretical calculation, mold processing, press manufacturing and other works of the film plate 100. Among them, the specific optimization method is described in the second implementation mode, which will not be repeated here. Specifically:

[0069] The concave curve A1 and the convex curve B1 defining the intersecting surface 4, as well as any convex curve defining the first corrugated structure 2 and any convex curve defining the second corrugated structure 3, can all be fitted by Taylor's formula to determine their mathematical expressions. Taylor's formula can be fitted to obtain mathematical expressions of a variety of curves, including parabolas, catenaries, arcs, trigonometric functions, inverse trigonometric function curves, exponential function curves, logarithmic function curves, and spline curves whose mathematical expressions have been standardized, as well as other curves whose mathematical expressions have not been standardized.

[0070] Among them, the Taylor formula can be used to approximate a variety of curve functions with n-order polynomials, and can approximate the curve within a certain domain of the function within a certain error range. For example, the Taylor formula is used to approximate the following expression to a cosine curve:

[0071]

[0072] In addition, the concave curve A1 and the convex curve B1 that define the intersecting surface 4, as well as any convex curve that defines the first corrugated structure 2 and any concave curve that defines the second corrugated structure 3, can be any one of a parabola, a catenary, a circular arc, a trigonometric function curve, an inverse trigonometric function curve, an exponential function curve, a logarithmic function curve and a spline curve, that is, a curve described by a mathematical expression; or at least a combination of the two, that is, the concave curve A1 and the convex curve B1 that define the intersecting surface 4, as well as any convex curve that defines the first corrugated structure 2 and any concave curve that defines the second corrugated structure 3, can be a curve formed by connecting multiple curve segments with different mathematical expressions.

[0073] In order to facilitate understanding and implementation of the present invention, some preferred embodiments are provided below:

[0074] like Figures 1 to 6 The first embodiment shown is a typical and special preferred embodiment of the present invention, and is characterized in that:

[0075] The convex curve defining the first corrugated structure 2 is the same as the convex curve defining the intersecting curved surface 4, that is, the mathematical expressions of the two are the same; the concave curve defining the second corrugated structure 3 is the same as the convex curve defining the intersecting curved surface 4, that is, the mathematical expressions of the two are the same. Therefore, by defining a concave curve and a convex curve, the shapes of the first corrugated structure 2, the second corrugated structure 3 and the intersecting curved surface 4 can be defined, so it is easier to describe mathematically, which is conducive to the processing and design of the film plate 100.

[0076] The distribution angle between the multiple corrugations in the first corrugated structure 2 and the multiple corrugations in the second corrugated structure 3 is 90 degrees, that is, the axis of the first corrugated structure 2 and the axis of the second corrugated structure 3 are orthogonal to each other, so that the first corrugated structure 2, the second corrugated structure 3 and the intersecting curved surface 4 can cooperate with each other to further improve the displacement compensation capability of the film plate 100, thereby further improving the liquid tightness and air tightness of the film container.

[0077] The shape of the intersecting surface 4 is exactly the same as that of the designed surface 5, and the convex curve defining the first corrugated structure 2, the concave curve defining the second corrugated structure 3, and the concave curve and convex curve defining the intersecting surface 4 are all parabolas, that is, the designed surface 5 and the intersecting surface 4 are the same hyperbolic paraboloid, so that a concave curve and a convex curve can be mathematically described by a simpler mathematical expression.

[0078] Therefore, the film plate 100 of this embodiment can be simplified as follows: two parabolas with opposite openings can be translated and slid along two mutually orthogonal lines to form the first corrugated structure 2, the second corrugated structure 3 and the intersecting curved surface 4, and finally form the film plate 100 together with the plate body 1.

[0079] Specifically, a first design directrix is ​​defined, and the first design directrix includes a first straight line segment (i.e., a first directrix Z1), a first intermediate curve segment (i.e., a concave curve B1), and a second straight line segment (i.e., a second directrix Z2) connected to each other; wherein the first straight line segment and the second straight line segment are extended along the tangent line Q2, and the first intermediate curve segment is the same as the concave curve B1; the convex curve A1 is translated along the first straight line segment, the first intermediate curve segment, and the second straight line segment as a generatrix in sequence, and the vertex of the convex curve slides on the first design directrix, thereby forming a first corrugation 21, an intersecting curved surface 4, and a second corrugation in sequence. 22; Similarly, define the second design directrix, which includes a third straight line segment (also known as the third directrix Z3), a second intermediate curve segment (also known as the convex curve A1) and a fourth straight line segment (also known as the third directrix Z4) connected to each other; wherein the third straight line segment and the fourth straight line segment are extended along the tangent Q1, and the second intermediate curve segment is the same as the convex curve; the concave curve is translated along the third straight line segment, the second intermediate curve segment and the fourth straight line segment as the generatrix in sequence, and the vertex of the concave curve slides on the second design directrix, thereby forming a third corrugation 31, the same intersecting curved surface 4 and a fourth corrugation 32 in sequence. The center point O1 of the intersecting curved surface 4 is set flush with the plane reference point O2 of the plate body 1.

[0080] The mathematical expression of the intersecting surface 4 can be z / h=x 2 / ay 2 / b; Of course, due to the different forms of mathematical expressions and the different value ranges and domains of the three variables x, y, and z, the intersecting surface 4 can have different shapes.

[0081] like Figure 7 The difference between the second embodiment shown and the first embodiment is that:

[0082] The first convex curve A1, the second convex curve A2, the third convex curve A3, the first concave curve B1, the second concave curve B2 and the third concave curve B3 are all arcs, that is, the first corrugation 21, the second corrugation 22, the third corrugation 31 and the fourth corrugation 32 are all parts of a cylindrical surface, and the intersecting curved surface 4 is a part of a torus surface.

[0083] like Figure 8 and Fig. 9 The difference between the third embodiment shown and the first embodiment is that:

[0084] The distribution angle between the multiple corrugations in the first corrugated structure 2 and the multiple corrugations in the second corrugated structure 3 is not 90 degrees, that is, the first corrugated structure 2 and the second corrugated structure 3 are not orthogonally arranged. Specifically, the angle between the first convex curve A1 and the first concave curve B1 is not 90 degrees.

[0085] like Fig.10 The fourth embodiment shown is different from the first embodiment in that:

[0086] The first corrugated structure 2 and / or the second corrugated structure 3 are corrugated structures with non-uniform width extension. The first corrugated structure 2 and / or the second corrugated structure 3 are corrugated structures with non-linear extension. Specifically, the third corrugation 31 in the second corrugated structure 3 includes a first equal-width corrugated section 311 connected to the intersecting curved surface 4 and extending with equal width, a tapered corrugated section 312 connected to the first equal-width corrugated section 311 and extending with tapered extension, and a second equal-width corrugated section 313 connected to the tapered corrugated section 312 and extending with equal width, wherein the width (i.e., span) of the first equal-width corrugated section 311 is greater than the width of the second equal-width corrugated section 313. The second corrugation 22 in the second corrugated structure 3 is formed by translation of a concave curve along a curve in a plane parallel to the plate body 1 (i.e., the fourth directrix Z4 is a curve).

[0087] like Fig.11 The fifth embodiment shown is different from the first embodiment in that:

[0088] The first corrugation 21 and the second corrugation 22 of the first corrugated structure 2 are arranged non-coaxially and / or the third corrugation 31 and the fourth corrugation 32 of the second corrugated structure 3 are arranged non-coaxially. Specifically, the third plane parallel to the plate body 1 where the third directrix Z3 defining the third corrugation 31 is located and the fourth plane parallel to the plate body 1 where the fourth directrix Z4 defining the fourth corrugation 32 is located are the same plane, and the third directrix Z3 and the fourth directrix Z4 are two parallel lines in the plane. Of course, the third directrix Z3 and the fourth directrix Z4 are two parallel lines in two parallel planes, that is, there is a height difference between the two in the thickness direction of the plate body 1.

[0089] like Fig.12 , Fig.13 as well as Fig.14 The sixth embodiment shown is different from the first embodiment in that:

[0090] The convex curve defining the first corrugation 21, the convex curve defining the second corrugation 22, the convex curve defining the third corrugation 31 and / or the convex curve defining the fourth corrugation 32 are non-parabolas. The design surface 5 is a hyperbolic parabola. The intersecting surface 4 is not a hyperbolic parabola and is a part of the design surface 5. Specifically, the convex curve defining the first corrugation 21, the convex curve defining the second corrugation 22, the convex curve defining the third corrugation 31 and the convex curve defining the fourth corrugation 32 all include an arc segment C1 and two parabola segments C2 connected to the two ends of the arc segment C1. The mathematical expression of the design surface 5 is z=x*y. The intersection line X where the first corrugation 21, the second corrugation 22, the third corrugation 31 and the fourth corrugation 32 intersect with the design surface 5 encloses the intersecting surface 4.

[0091] like Fig.15 The seventh embodiment shown is different from the first embodiment in that:

[0092] There is a height difference between the center point O1 of the intersecting curved surface 4 and the plane reference point O2 of the plate body 1. Specifically, the convex height of the first corrugated structure 2 is higher than the concave depth of the second corrugated structure 3, and accordingly, the center point O1 of the intersecting curved surface 4 is located above the plane reference point O2 of the plate body 1.

[0093] Implementation Method 2

[0094] Combination Fig.16 As shown, the present invention also provides an optimization method for a thin film plate 100, which is used to optimize the above-mentioned thin film plate 100, including the following steps: adjusting the optimization parameters to change the structural parameters of the thin film plate 100; wherein the optimization parameters are at least one parameter in the mathematical expression of the first corrugated structure 2, the second corrugated structure 3 and the intersecting surface 4; obtaining the performance parameters of the thin film plate 100; repeating the above steps until the performance parameters reach the preset value.

[0095] The optimization method of the thin film plate 100 of the present invention utilizes at least one parameter in the mathematical expression of the intersecting surface 4 as an optimization parameter, and changes the structural parameters of the thin film plate 100 by adjusting the optimization parameter, thereby optimizing the performance of the thin film plate 100 and making the performance of the thin film plate 100 meet the design requirements.

[0096] Since the shape of the intersecting curved surface 4 is determined by the first convex curve A1 and the first concave curve B1, Figures 1 to 3 As shown, in some special cases, the first convex curve A1 is equivalent to the second convex curve A2 and the third convex curve A3, and the first concave curve B1 is equivalent to the second concave curve B2 and the third concave curve B3. Therefore, once the mathematical expression of the intersecting surface 4 is determined, the mathematical expressions of the first convex curve A1 and the first concave curve B1 are also determined, that is, the mathematical expressions of the second convex curve A2 and the third convex curve A3 and the second concave curve B2 and the third concave curve B3 are also determined. In other words, by limiting a concave curve and a convex curve, the definition of the intersecting surface 4, the first corrugated structure 2 and the second corrugated structure 3 can be achieved. Furthermore, by adjusting the parameters in the mathematical expression of the intersecting surface 4, while changing the structure of the intersecting surface 4, the structures of the first corrugated structure 2 and the second corrugated structure 3 will also change accordingly, thereby changing the structural parameters of the film plate 100. Fig.15 As shown, after the optimization parameters are adjusted, the intersecting curved surface 4 changes to the shape of the intersecting curved surface 4', and accordingly, the first convex curve A1 changes to the first convex curve A1', and the first concave curve B1 changes to the first concave curve B1'.

[0097] Combination Figures 1 to 3As shown, in some embodiments of the present invention, the first convex curve A1, the second convex curve A2, the third convex curve A3, the first concave curve B1, the second concave curve B2 and the third concave curve B3 are all parabolas, therefore, the mathematical expression of the intersecting surface 4 is the mathematical equation of the hyperbolic parabola, and the optimization parameter includes at least one constant of the mathematical equation of the intersecting surface 4. Specifically, the specific mathematical equation of the intersecting surface 4 is related to the established reference coordinate system, and therefore may not be specifically limited. For example, in this embodiment, the mathematical equation of the intersecting surface 4 is the standard equation of the hyperbolic parabola: Among them, one or more constants among constant h, constant a and constant b can be selected as optimization parameters for adjustment. For example, in the embodiment, constant h and constant b are fixed, and only constant a is selected as the optimization parameter for adjustment. In addition, in order to limit the span of the intersecting surface 4 in the two directions of the intersection and the depth of the concave setting, the value ranges of variables x, variable y and variable z are limited.

[0098] In some other embodiments of the present invention, the mathematical expression of the intersecting surface 4 can also be in the following form:

[0099] or Among them, one or more constants among constant h, constant v, constant u, constant a and constant b can be selected as optimization parameters for adjustment.

[0100] In the embodiment of the present invention, the structural parameters include the size, shape, curvature, peak height, valley depth and / or maximum span of the first corrugated structure 2 , the second corrugated structure 3 and the intersecting curved surface 4 .

[0101] In the embodiment of the present invention, obtaining the performance parameters of the thin film plate 100 includes the following steps: establishing a three-dimensional model of the thin film plate 100 according to the adjusted optimization parameters and the mathematical expression of the intersecting curved surface 4; and obtaining its performance parameters by simulation calculation of the three-dimensional model of the thin film plate 100. The performance parameters include the displacement compensation capability, strength, fatigue performance and / or progressive deformation performance of the first corrugated structure 2, the second corrugated structure 3 and the intersecting curved surface 4.

[0102] It can be seen that the present invention optimizes the thin film plate 100 by first conducting theoretical research based on the three-dimensional model, and obtaining performance parameters through simulation calculations, and then determining whether the engineering requirements can be met; there is no need to first manufacture the actual thin film plate 100, and then conduct experiments based on the actual thin film plate 100 to obtain its performance parameters, or first scan the actual thin film plate 100 into a three-dimensional model through three-dimensional scanning and other methods, and then perform operations such as mold repair to obtain a three-dimensional model that is relatively close to the actual thin film plate 100, and finally conduct theoretical research based on the three-dimensional model; therefore, the process of optimizing the thin film plate 100 of the present invention is simple and low-cost, which is conducive to the iteration of the thin film plate 100 and makes it more in line with design requirements.

[0103] like Fig.16 As shown, in the embodiment of the present invention, by adjusting the constant a, the intersecting surface 4 when a=1 and the intersecting surface 4' when a=0.5 are obtained, and then the performance parameters of the two film plates 100 are obtained. It is found that the intersecting surface 4 and the intersecting surface 4' obtained when a=1 and a=0.5 are different in displacement compensation ability, strength, stability and other performances that can be achieved when applied to the film plate 100. Therefore, based on such an adjustment idea, the film plate 100 can be optimized by adjusting the parameters of the mathematical expression so that its performance can meet the engineering requirements. Moreover, by adjusting the parameters of the mathematical expression for optimization, the film plate 100 can have different performances in different directions, providing an operational, accurate calculation and design method for meeting different engineering requirements. In addition, since the main function of the thin film plate 100 in the present invention is to realize the displacement compensation function in two intersecting directions (such as two orthogonal directions) under the premise of maintaining a certain strength and stability, and the displacement amounts to be compensated in the two intersecting directions can be set to be the same or different according to engineering requirements, therefore, based on such an adjustment idea, the thin film plate 100 is optimized so that the displacement compensation functions of the thin film plate 100 in the two intersecting directions meet the design requirements.

[0104] In the embodiment of the present invention, after the performance parameter reaches the preset value, the following steps are also included: the thin film plate 100 is processed according to the optimization parameters determined by the final adjustment and the target mathematical expression of the intersecting surface 4. Specifically, a press mold is first opened according to the optimization parameters determined after the adjustment and the target mathematical expression of the intersecting surface 4, and then the plate body 1 is pressed into the thin film plate 100 having the first corrugated structure 2, the second corrugated structure 3 and the intersecting surface 4 by using the press mold.

[0105] Implementation Method 3

[0106] like Fig.17As shown, the present invention also provides a film container, including at least one film plate 100. The specific structure, working principle and beneficial effects of the film plate 100 in this embodiment are the same as those of the film plate 100 in the first embodiment, and are not repeated here. Among them, the first corrugated structure 2 and the second corrugated structure 3 on the film plate 100, one of which is concave toward the inside of the tank, and the other is concave toward the outside of the tank.

[0107] Specifically, the flexible inner tank of the film container is formed by splicing a plurality of film sheets 100. To facilitate cutting the film sheets 100 according to the desired spliced ​​shape, for example, in this embodiment, the four corners of the square film sheets 100 are trimmed; any side edge of the film sheet 100 can also be pressed and flattened before welding.

[0108] The above are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A film plate, characterized in that: It comprises a plate body, on which a first corrugated structure, a second corrugated structure and at least one intersecting curved surface are provided, the first corrugated structure is convexly arranged, the second corrugated structure is concavely arranged, and the first corrugated structure and the second corrugated structure are cross-arranged through the intersecting curved surface; Among them, a design surface is defined, and the design surface is a surface structure formed by the first convex curve translating along the first concave curve and the vertex of the first convex curve sliding on the first concave curve, the first corrugated structure and the second corrugated structure can intersect with the design surface, and the intersection line encloses the intersecting surface.

2. The film sheet according to claim 1, characterized in that: The first convex curve and the first concave curve are both curves that can be fitted by Taylor's formula.

3. The thin film sheet according to claim 1, characterized in that: The first convex curve is any one of a parabola, a catenary, a circular arc, a trigonometric function curve, an inverse trigonometric function curve, an exponential function curve, a logarithmic function curve and a spline curve, and / or a combination of at least two of them; the first concave curve is any one of a parabola, a catenary, a circular arc, a trigonometric function curve, an inverse trigonometric function curve, an exponential function curve, a logarithmic function curve and a spline curve, and / or a combination of at least two of them.

4. The thin film sheet according to claim 1, characterized in that: The first convex curve and the first concave curve are both parabolas, and the intersecting surface is a hyperbolic parabola.

5. The thin film sheet according to claim 1, characterized in that: The first corrugated structure and the second corrugated structure are arranged orthogonally or obliquely.

6. The film sheet according to any one of claims 1 to 5, characterized in that: The first corrugated structure includes at least one first corrugation and at least one second corrugation connected to the intersecting curved surface, the second corrugated structure includes at least one third corrugation and at least one fourth corrugation connected to the intersecting curved surface, the first corrugation is a curved surface structure formed by translating the second convex curve along the first directrix, the second corrugation is a curved surface structure formed by translating the third convex curve along the second directrix, the third corrugation is a curved surface structure formed by translating the second concave curve along the third directrix, and the fourth corrugation is a curved surface structure formed by translating the third concave curve along the fourth directrix.

7. The film sheet according to claim 6, characterized in that: The second convex curve and the third convex curve are both identical to the first convex curve; the second concave curve and the third concave curve are both identical to the first concave curve.

8. The film sheet according to claim 6, characterized in that: The first directrix is ​​a straight line or a curve located in a first plane parallel to the plate; The second directrix is ​​a straight line or a curve located in a second plane parallel to the plate; The third directrix is ​​a straight line or a curve located in a third plane parallel to the plate body; The fourth directrix is ​​a straight line or a curve located in a fourth plane parallel to the plate body.

9. The film sheet according to claim 8, characterized in that: The first plane and the second plane are the same plane; the third plane and the fourth plane are the same plane.

10. The film sheet according to any one of claims 1 to 5, characterized in that: The first corrugated structure is a corrugated structure with equal width and extension; or the first corrugated structure includes corrugated sections with gradually contracting extension or gradually expanding extension; The second corrugated structure is a corrugated structure extending with equal width; or the second corrugated structure includes corrugated sections extending with a gradually contracting arrangement or a gradually expanding arrangement.

11. The thin film sheet according to claim 1, characterized in that: The span range of the first corrugated structure and the second corrugated structure is 1 mm to 1000 mm.

12. The thin film sheet according to claim 1, characterized in that: The convex height range of the first corrugated structure and the concave depth range of the second corrugated structure are both 1 mm to 500 mm.

13. The thin film sheet according to claim 1, characterized in that: The thickness of the plate body ranges from 0.1 mm to 10 mm.

14. A method for optimizing a thin film plate, characterized in that: The method for optimizing the thin film sheet according to any one of claims 1 to 13 comprises the following steps: Adjusting optimization parameters to change the structural parameters of the film plate; wherein the optimization parameters are at least one parameter in the mathematical expressions of the first corrugated structure, the second corrugated structure and the intersecting surface; Obtaining performance parameters of the film plate; Repeat the above steps until the performance parameter reaches a preset value.

15. The method for optimizing a thin film plate according to claim 14, characterized in that: The mathematical expression of the intersecting surface is a mathematical equation of a hyperbolic parabola, and the optimization parameter includes at least one constant of the mathematical expression of the intersecting surface.

16. The method for optimizing a thin film plate according to claim 14, characterized in that: The structural parameters include the size, shape, curvature, peak height, valley depth and / or maximum span of the first corrugated structure, the second corrugated structure and the intersecting curved surface.

17. The method for optimizing a thin film plate according to claim 14, characterized in that: The performance parameters include the displacement compensation capability, strength, fatigue performance and / or progressive deformation performance of the first corrugated structure, the second corrugated structure and the intersecting curved surface.

18. The method for optimizing a thin film plate according to claim 14, characterized in that: The method of obtaining the performance parameters of the film plate comprises the following steps: Establishing a three-dimensional model of the thin film plate according to the adjusted optimization parameters and the mathematical expressions of the intersecting surfaces; The performance parameters of the film plate are obtained by simulation calculation of the three-dimensional model of the film plate.

19. The method for optimizing a thin film plate according to claim 14, characterized in that: After the performance parameter reaches the preset value, the method further includes the following steps: determining the optimization parameter based on the final adjustment and the target mathematical expression of the intersecting surface.

20. A film container, characterized in that: A film sheet comprising at least one film sheet according to any one of claims 1 to 13.

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