MEMBRANE PLATE AND OPTIMIZATION METHOD FOR IT AND MEMBRANE CAPACITY

Abstract

A thin film plate and an optimization method therefor, and a thin film container. The thin film plate comprises a plate body provided with a first corrugated structure, a second corrugated structure and at least one intersecting curved surface thereon, the first corrugated structure being raised, the second corrugated structure being recessed, and the first corrugated structure and the second corrugated structure being arranged in an alternate manner by means of the intersecting curved surface; a designed curved surface being defined in such a way that the curved surface is a curved surface structure formed by a first convex curve translating along a first concave curve and a vertex of the first convex curve sliding on the first concave curve, the first corrugated structure and the second corrugated structure being capable of intersecting with the designed curved surface, and intersecting lines defining the intersecting curved surface.

Description

Film plate, optimization method thereof, and film container

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202311027994.1 filed on August 15, 2023, and cites the contents disclosed in the above patent application as part of this application. Technical Field

[0003] The present application 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

[0004] Film containers, such as film tanks, are cryogenic storage tanks that can contain liquids such as cryogenic liquid hydrogen, cryogenic liquid oxygen, cryogenic LNG, cryogenic ethylene, cryogenic ethane, cryogenic liquid ammonia, cryogenic propane, cryogenic propylene, and cryogenic butane at near atmospheric pressure.

[0005] Membrane tanks generally have three core structures: an outer tank with greater strength and rigidity, a flexible inner tank made of metal film, and insulating support materials between the inner and outer tanks; among them, 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 also responsible for isolating the medium from 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.

[0006] When the material of the film plate of the flexible inner tank is made of a material 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 shrink, stretch, become unstable, etc. Therefore, it is necessary to design a plate-like structure with multiple arched waves to deal with the above problems.

[0007] In the prior art, some of the arch waves on the film plates are discontinuous arch waves, that is, the intersecting positions of the two waves cannot be connected. During the press forming process, the ends of each arch 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 maximum thinning amount, resulting in a superimposed leakage risk. Another part of the arch waves on the film plates are mutually orthogonal arch waves, and the intersection position forms a complex pleated structure. Therefore, the design and manufacturing costs are high and the difficulty is great, and the forming accuracy is difficult to quantitatively control.

[0008] Summary of the Invention

[0009] The purpose of this application is to provide a film plate, an optimization method thereof, and a film container to solve the technical problems that the current film plate adopts discontinuous arch waves, which will increase the material's forming thinning amount, elongation, residual stress, and cause the superposition of leakage risks, and solve the technical problems that the current film plate adopts orthogonal arch waves, and the wrinkle structure formed at the intersection position will cause high design and manufacturing costs, great difficulty, and difficult to control the forming accuracy.

[0010] The above-mentioned purpose of this application can be achieved by adopting the following technical solutions:

[0011] The present application provides a thin film plate, 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 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 design curved surface is defined, and the design 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, the first corrugated structure and the second corrugated structure can intersect with the design curved surface, and the intersecting lines enclose to form an intersecting curved surface.

[0012] In the embodiment of the present application, both the first convex curve and the first concave curve are curves that can be fitted by Taylor's formula.

[0013] In an embodiment of the present application, 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, 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 of them.

[0014] In the embodiment of the present application, the first convex curve and the first concave curve are both parabolas, and the intersecting surface is a hyperbolic paraboloid.

[0015] In an embodiment of the present application, the first corrugated structure and the second corrugated structure are arranged orthogonally or obliquely.

[0016] In an embodiment of the present application, the first corrugated structure includes at least one first corrugation and at least one second corrugation connected to the intersecting curved surface, and 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.

[0017] In the embodiment of the present application, 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.

[0018] In an embodiment of the present application, the first directrix is ​​a straight line or curve located in a first plane parallel to the plate body; the second directrix is ​​a straight line or curve located in a second plane parallel to the plate body; the third directrix is ​​a straight line or curve located in a third plane parallel to the plate body; and the fourth directrix is ​​a straight line or curve located in a fourth plane parallel to the plate body.

[0019] In the embodiments of the present application, the first plane and the second plane are the same plane; the third plane and the fourth plane are the same plane.

[0020] In an embodiment of the present application, 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.

[0021] In the embodiment of the present application, the span range of the first corrugated structure and the second corrugated structure are both 1 mm to 1000 mm.

[0022] In the embodiment of the present application, 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.

[0023] In the embodiment of the present application, the thickness of the plate ranges from 0.1 mm to 10 mm.

[0024] The present application provides a method for optimizing a thin film plate, which is used to optimize the above-mentioned thin film plate, including 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.

[0025] In an embodiment of the present application, the mathematical expression of the intersecting surfaces is a mathematical equation of a hyperbolic paraboloid, and the optimization parameter includes at least one constant of the mathematical expression of the intersecting surfaces.

[0026] In an embodiment of the present application, 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.

[0027] In the embodiment of the present application, 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.

[0028] In an embodiment of the present application, 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.

[0029] In the embodiment of the present application, after the performance parameter reaches the preset value, the following steps are further included: optimizing the parameters determined according to the final adjustment and the target mathematical expression of the intersecting surface.

[0030] The present application also provides a film container, comprising at least one of the above-mentioned film plates.

[0031] The features and advantages of this application are:

[0032] The film plate and film container of the present application are provided with a relatively convex first corrugated structure and a relatively concave second corrugated structure on the plate body, and an intersecting curved surface connecting the first corrugated structure and the second corrugated structure. A design curved surface defined by a convex curve and a concave curve is defined, and 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 to improve the displacement compensation capability of the film plate, thereby 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 pressing the intersecting curved surface, reduce the thinning amount and residual stress, and stabilize the structural dimensions after finalization. On the other hand, by defining the concave curve and the convex curve, the design curved surface can be defined, and thus the intersecting curved surface can also be defined, thereby facilitating the optimization of the performance of the engineering structure by adjusting the parameters of the mathematical expression, and facilitating the mold processing and the press-forming manufacturing of the film plate. Therefore, it is beneficial to reduce the cost and difficulty of design and manufacturing, and the forming precision is easy to control.

[0033] The optimization method of the film plate of the present application uses 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. By adjusting the optimization parameter, the structural parameters of the film plate are changed, thereby optimizing the performance of the film plate so that the performance of the film plate meets the design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0035] FIG1 is a perspective schematic diagram of a film plate in Example 1 of the present application;

[0036] FIG2 is a schematic diagram showing the relationship between the designed curved surface and the first convex curve and the first concave curve in Example 1 of the present application;

[0037] FIG3 is a schematic diagram of the relationship between the intersecting curved surfaces and the intersection line in Example 1 of the present application;

[0038] FIG4 is a top view of the film plate in Example 1 of the present application;

[0039] FIG5 is a side view of the film plate in Example 1 of the present application;

[0040] FIG6 is a front view of the film plate in Example 1 of the present application;

[0041] FIG7 is a perspective schematic diagram of the film plate in Example 2 of the present application;

[0042] FIG8 is a top view of the film plate in Example 3 of the present application;

[0043] FIG9 is a three-dimensional schematic diagram of intersecting curved surfaces in Example 3 of the present application;

[0044] FIG10 is a perspective schematic diagram of a film plate in Example 4 of the present application;

[0045] FIG11 is a perspective schematic diagram of the film plate in Example 5 of the present application;

[0046] FIG12 is a perspective schematic diagram of a film plate in Example 6 of the present application;

[0047] FIG13 is a perspective schematic diagram of the designed curved surface of the film plate in Example 6 of the present application;

[0048] FIG14 is a three-dimensional schematic diagram of intersecting curved surfaces in Example 6 of the present application;

[0049] FIG15 is a perspective schematic diagram of a film plate in Example 7 of the present application;

[0050] FIG16 is a schematic diagram of optimizing the design of intersecting curved surfaces in this application;

[0051] FIG17 is a partial schematic diagram of the film container in this application. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0053] Implementation Method 1

[0054] In combination with Figures 1, 2 and 3, the present application 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 design curved surface 5 is defined, and the design 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 design curved surface 5, and the intersection line X encloses to form the intersecting curved surface 4.

[0055] Since the intersection line formed by the first corrugated structure 2 and the second corrugated structure 3 and 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 harmoniously.

[0056] It should be noted that the definition of the design curved surface 5 formed by the translation of the first convex curve A1 along the first concave curve B1, with the vertex of the first convex curve A1 sliding on the first concave curve B1, in this application is intended only to clearly describe the shape of the intersecting curved surface 4 of the film sheet 100 of this application. The design curved surface 5 is not a structure of the film sheet 100 of this application. Furthermore, intersecting curved surfaces 4 with the same shape but described differently are also within the scope of protection of this application.

[0057] 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.

[0058] Specifically, the first corrugated structure 2 includes at least one first corrugation 21 and at least one second corrugation 22, which are identical or different, formed by the translation of at least one convex curve along at least two directrixes. 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 identical or different, formed by the translation of at least one concave curve along at least two directrixes. The at least one third corrugation 31 and at least the at least 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 line Q2 at the vertex of the first concave curve B1 to form a first intersecting line X1 and a second intersecting line X2, and the third corrugation 31 and the third corrugation 32 intersect with the design curved surface 5 along the direction of the tangent line Q1 at the vertex of the first convex curve A1 to form a third intersecting line X3 and a fourth intersecting line X4, respectively.

[0059] The film plate 100 of the present application 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 by defining a design curved surface 5 defined by a convex curve A1 and a concave curve B1, and the first corrugated structure 2 and the second corrugated structure 3 intersecting with the design curved surface 5 to form an 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 to improve the displacement compensation capability of the film plate 100, thereby facilitating the improvement of the liquid tightness and the 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 curved surface 4 is pressed, the forming thinning amount is small, and the residual stress is small. The structural dimensions are 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, thereby facilitating the optimization of the performance of the engineering structure by adjusting the parameters of the mathematical expression, and facilitating the mold processing and the press-forming manufacturing of the film plate, thereby reducing the cost and difficulty of design and manufacturing, and the molding accuracy is easy to control.

[0060] As shown in FIG2 and FIG3 , in the embodiment of the present application, the intersecting curved surface 4 and the designed curved surface 5 can be identical, 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.

[0061] The plate body 1 is generally a planar plate. The shape of the plate body 1 is not specifically limited; it can be square, as in the embodiment of the present application; or it can be rectangular, trapezoidal, triangular, arc-shaped, or other shapes, as in other embodiments of the present application. Specifically, the thickness of the plate body 1 ranges from 0.1 mm to 10 mm, preferably from 0.1 mm to 3 mm.

[0062] As shown in Figures 4, 5, and 6, in the embodiments of the present application, the center point O1 of the intersecting curved surface 4, i.e., the intersection point where the apex of the convex curve A1 and the apex of the concave curve B1 intersect, can be flush with the planar reference point O2 of the plate body 1. This allows the intersecting curved surface 4 to have a low elongation, small forming thinning, and low residual stress when press-molded on the plate body 1, resulting in a more stable structural dimension of the intersecting curved surface 4 after finalization. Of course, a height difference may also exist.

[0063] 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 angles between the multiple corrugations in the first corrugated structure 2 and the distribution angles between the multiple corrugations in the second corrugated structure 3 are not specifically limited. It is sufficient that 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 along two straight lines. The first corrugated structure 2 and the second corrugated structure 3 can be arranged orthogonally, generally forming a "cross" shape, or they can be arranged obliquely, generally forming an "X" shape.

[0064] Furthermore, the number of corrugations in the first corrugated structure 2, the number of corrugations in the second corrugated structure 3, and the number of intersecting curved surfaces 4 on the plate body 1 are not specifically limited. It is sufficient that 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 in the first corrugated structure 2 and the number of corrugations in the second corrugated structure 3 can be the same, for example, two each, with the two corrugations of the first corrugated structure 2 arranged in one direction and connected to an intersecting curved surface 4, and the two corrugations of the second corrugated structure 3 arranged in another direction and connected to the same 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 they may cross 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.

[0065] 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.

[0066] 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 or different from the first convex curve A1; similarly, the second concave curve B2 and the third concave curve B3 can be the same or different, and can be the same as or different from the first concave curve B1.

[0067] The first directrix Z1 and the second directrix Z2 can be the same or different; similarly, the third directrix Z3 and the fourth directrix Z4 can be the same or different. Furthermore, the first directrix Z1 can be a straight line or a curve located within a first plane parallel to the plate 1; the second directrix Z2 can be a straight line or a curve located within a second plane parallel to the plate 1; the third directrix Z3 can be a straight line or a curve located within a third plane parallel to the plate 1; and the fourth directrix Z4 can be a straight line or a curve located within a fourth plane parallel to the plate 1. Furthermore, the first plane and the second plane can be the same plane or two planes above the plate 1 with a height difference; similarly, the third plane and the fourth plane can be the same plane or two planes below the plate 1 with a height difference. Therefore, the extension lengths of the first corrugation 21, the second corrugation 22, the third corrugation 31, and the fourth corrugation 32 can be specifically defined and can be the same or different.

[0068] Specifically, the span range of the first corrugated structure 2 and the second corrugated structure 3 (i.e., the width of the crest or trough) is 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.

[0069] In addition, the first corrugated structure 2 can be a corrugated structure with an equal width extension setting, 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 setting or a gradually expanding extension setting, 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 an equal width extension setting, 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 setting or a gradually expanding extension setting, 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.

[0070] In an embodiment of the present application, to avoid stress concentration at the connection between the intersecting surface 4 and the first and second corrugated structures 2 and 3, the intersecting surface 4 is connected to the first and second corrugations 21 and 22 via a first transition surface, and the intersecting surface 4 is connected to the third and third corrugations 31 and 32 via a second transition surface. Specifically, the first transition surface includes a first arc transition surface, and the second transition surface includes a second arc transition surface. The first arc transition surface can be a curved surface structure formed by translating the convex curve A1 along an arc, and the second arc transition surface can be a curved surface structure formed by translating the concave curve B1 along an arc. The two ends of the intersecting surface 4 in the direction of the tangent line Q2 are connected to the first and second corrugations 21 and 22 via two first arc transition surfaces. The two ends of the intersecting surface 4 in the direction of the tangent line Q1 are connected to the third and fourth corrugations 31 and 32 via two second arc transition surfaces.

[0071] Whether it is the concave curve and 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 can all be not specifically defined. However, in order to facilitate processing and design, this application 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 for modeling, stress analysis, structural design, theoretical calculation, mold processing, press manufacturing, etc. of the film plate 100. Among them, the specific optimization method is described in the second embodiment and will not be repeated here. Specifically:

[0072] 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 using the Taylor formula to determine their mathematical expressions. The Taylor formula can be fitted to obtain the mathematical expressions of a variety of curves, including parabolas, catenaries, circular 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.

[0073] Among them, the Taylor formula can be used to approximate a variety of curve functions using n-degree polynomials, and can approximate the curve within a certain domain of the function within a certain error range. For example, the Taylor formula can be used to approximate the following expression to a cosine curve:

[0074] In addition, 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 concave curve defining 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 defining the intersecting surface 4, as well as any convex curve defining the first corrugated structure 2 and any concave curve defining the second corrugated structure 3, can be a curve formed by connecting multiple curve segments with different mathematical expressions.

[0075] In order to facilitate understanding and implementation of this application, some preferred embodiments are provided below:

[0076] The first embodiment shown in FIG. 1 to FIG. 6 is a typical and special preferred embodiment of the present application, and is characterized in that:

[0077] The convex curve defining the first corrugated structure 2 and the convex curve defining the intersecting curved surface 4 are identical, meaning their mathematical expressions are the same. The concave curve defining the second corrugated structure 3 and the convex curve defining the intersecting curved surface 4 are identical, meaning their mathematical expressions 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. This makes mathematical description easier, facilitating the processing and design of the film sheet 100.

[0078] 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 work together 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.

[0079] 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.

[0080] Therefore, the film plate 100 of this embodiment can be simplified as follows: two parabolas with opposite openings slide along two mutually orthogonal lines to form the first corrugated structure 2, the second corrugated structure 3 and the intersecting curved surface 4, which finally form the film plate 100 together with the plate body 1.

[0081] Specifically, a first design directrix is ​​defined, which 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 in the direction of the tangent Q2, and the first intermediate curve segment is the same as the concave curve B1; the convex curve A1 is translated as a generatrix along the first straight line segment, the first intermediate curve segment, and the second straight line segment 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, a second design directrix is ​​defined, which includes a connected third straight line segment (i.e., third directrix Z3), a second intermediate curve segment (i.e., convex curve A1), and a fourth straight line segment (i.e., third directrix Z4); wherein the third straight line segment and the fourth straight line segment extend along the tangent Q1, and the second intermediate curve segment is the same as the convex curve; the concave curve as the generatrix is ​​translated in sequence along the third straight line segment, the second intermediate curve segment, and the fourth straight line segment, and the vertex of the concave curve slides on the second design directrix, thereby sequentially forming a third corrugation 31, the same intersecting curved surface 4, and a fourth corrugation 32. The center point O1 of the intersecting curved surface 4 is flush with the plane reference point O2 of the plate body 1.

[0082] 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 definition domains of the three variables x, y, and z, the intersecting surface 4 can have different shapes.

[0083] The second embodiment shown in FIG7 is different from the first embodiment in that:

[0084] 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 surface 4 is a part of a torus.

[0085] The third embodiment shown in FIG8 and FIG9 differs from the first embodiment in that:

[0086] The distribution angles between the multiple corrugations in the first corrugated structure 2 and the multiple corrugations in the second corrugated structure 3 are not 90 degrees, that is, the first corrugated structure 2 and the second corrugated structure 3 are not orthogonal. Specifically, the angle between the first convex curve A1 and the first concave curve B1 is not 90 degrees.

[0087] The fourth embodiment shown in FIG10 differs from the first embodiment in that:

[0088] The first corrugated structure 2 and / or the second corrugated structure 3 are corrugated structures extending in non-uniform widths. The first corrugated structure 2 and / or the second corrugated structure 3 are corrugated structures extending in non-straight lines. 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 in equal width, a tapered corrugated section 312 connected to the first equal-width corrugated section 311 and extending in a tapered manner, and a second equal-width corrugated section 313 connected to the tapered corrugated section 312 and extending in 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 the 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).

[0089] The fifth embodiment shown in FIG11 is different from the first embodiment in that:

[0090] The first corrugations 21 and second corrugations 22 of the first corrugated structure 2 are arranged non-coaxially, and / or the third corrugations 31 and fourth corrugations 32 of the second corrugated structure 3 are arranged non-coaxially. Specifically, the third plane parallel to the plate body 1, on which the third directrix Z3 defining the third corrugation 31 lies, and the fourth plane parallel to the plate body 1, on which the fourth directrix Z4 defining the fourth corrugation 32 lies, are located, are coplanar, and the third directrix Z3 and the fourth directrix Z4 are parallel lines within this plane. Of course, the third directrix Z3 and the fourth directrix Z4 are parallel lines within two parallel planes, meaning there is a height difference between them in the thickness direction of the plate body 1.

[0091] The sixth embodiment shown in FIG. 12 , FIG. 13 and FIG. 14 differs from the first embodiment in that:

[0092] 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 paraboloid. The intersecting surface 4 is not a hyperbolic paraboloid and is 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 each include an arc segment C1 and two parabolic segments C2 connecting the 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 forms the intersecting surface 4.

[0093] The seventh embodiment shown in FIG15 differs from the first embodiment in that:

[0094] 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. Accordingly, the center point O1 of the intersecting curved surface 4 is located above the plane reference point O2 of the plate body 1.

[0095] Implementation Method 2

[0096] In combination with Figure 16, the present application 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.

[0097] The optimization method of the thin film plate 100 of the present application uses at least one parameter in the mathematical expression of the intersecting surface 4 as an optimization parameter. By adjusting the optimization parameter, the structural parameters of the thin film plate 100 are changed, thereby optimizing the performance of the thin film plate 100 and making the performance of the thin film plate 100 meet the design requirements.

[0098] Since the shape of intersecting surface 4 is determined by first convex curve A1 and first concave curve B1, and as shown in Figures 1 to 3 , in certain special cases, first convex curve A1 is equivalent to second convex curve A2 and third convex curve A3, and first concave curve B1 is equivalent to second concave curve B2 and third concave curve B3, respectively, once the mathematical expression of intersecting surface 4 is determined, the mathematical expressions of first convex curve A1 and first concave curve B1 are also determined, that is, the mathematical expressions of second convex curve A2 and third convex curve A3, as well as second concave curve B2 and third concave curve B3, are also determined. In other words, by defining a concave curve and a convex curve, the intersecting surface 4, the first corrugated structure 2, and the second corrugated structure 3 can be defined. Furthermore, by adjusting the parameters in the mathematical expression of intersecting surface 4, while changing the structure of intersecting surface 4, the structures of first corrugated structure 2 and second corrugated structure 3 will also change accordingly, thereby changing the structural parameters of thin film sheet 100. As shown in FIG15 , after the optimization parameters are adjusted, the intersecting surface 4 changes to the shape of the intersecting surface 4 ′. 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 ′.

[0099] In conjunction with Figures 1 to 3, in some embodiments of the present application, the first convex curve A1, the second convex curve A2, the third convex curve A3, and 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 a hyperbolic paraboloid, and the optimization parameters include 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 paraboloid: z / h=x 2 / a 2 -y 2 / b 2 , wherein one or more of the constants h, a, and b can be selected as optimization parameters to be adjusted. For example, in the embodiment, the constants h and b are fixed, and only the constant a is selected as the optimization parameter to be adjusted. Furthermore, in order to limit the span of the intersecting surface 4 in both directions of intersection and the depth of the concave setting, the value ranges of the variables x, y, and z are limited.

[0100] In some other embodiments of the present application, the mathematical expression of the intersecting surface 4 can also be in the following form: or

[0101] 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.

[0102] In the embodiment of the present application, 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 .

[0103] In the embodiments of the present application, obtaining the performance parameters of the thin film sheet 100 includes the following steps: establishing a three-dimensional model of the thin film sheet 100 based on the adjusted optimization parameters and the mathematical expression of the intersecting curved surface 4; and obtaining the performance parameters of the thin film sheet 100 using simulation calculations of the three-dimensional model. 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.

[0104] It can be seen from this that the present application optimizes the thin film plate 100, and can first conduct theoretical research based on the three-dimensional model, and obtain performance parameters through simulation calculations to determine whether it can meet engineering requirements; 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 through operations such as mold repair, a three-dimensional model that is relatively close to the actual thin film plate 100 can be obtained, and finally theoretical research can be conducted based on the three-dimensional model; therefore, the process of optimizing the thin film plate 100 in the present application is simple and low-cost, which is conducive to the iteration of the thin film plate 100, making it more in line with design requirements.

[0105] As shown in Figure 16, in the embodiment of the present application, by adjusting the constant a, the intersecting surface 4 when a = 1 and the intersecting surface 4' when a = 0.5 were obtained, respectively, and the performance parameters of the two thin film panels 100 were obtained. It was found that the intersecting surface 4 and the intersecting surface 4' obtained when a = 1 and a = 0.5 differed in the displacement compensation capability, strength, stability, and other properties that could be achieved when applied to the thin film panel 100. Therefore, based on this adjustment concept, the thin film panel 100 can be optimized by adjusting the parameters of the mathematical expression so that its performance meets engineering requirements. Furthermore, by optimizing the parameters of the mathematical expression, the thin film panel 100 can have different performance in different directions, providing an operational, precise calculation and design method for meeting different engineering requirements. In addition, since the main function of the film plate 100 in this application is to realize the displacement compensation function in two intersecting directions (such as two orthogonal directions) while maintaining a certain strength and stability, and the displacement amount to be compensated in the two intersecting directions can be set to be the same or different according to engineering requirements, the film plate 100 is optimized based on such an adjustment idea so that the displacement compensation function of the film plate 100 in the two intersecting directions meets the design requirements.

[0106] In the embodiment of the present application, after the performance parameters reach the preset values, the following steps are further included: processing the thin film sheet 100 based on the final adjusted optimization parameters and the target mathematical expression of the intersecting curved surface 4. Specifically, a pressing mold is first formed based on the adjusted optimization parameters and the target mathematical expression of the intersecting curved surface 4, and then the pressing mold is used to press the sheet body 1 into the thin film sheet 100 having the first corrugated structure 2, the second corrugated structure 3, and the intersecting curved surface 4.

[0107] Implementation Method 3

[0108] As shown in Figure 17 , the present application also provides a film container comprising at least one film sheet 100. The specific structure, operating principle, and beneficial effects of film sheet 100 in this embodiment are identical to those of film sheet 100 in Embodiment 1 and are not further described here. Specifically, the first corrugated structure 2 and the second corrugated structure 3 on film sheet 100 are concave toward the interior of the container, and the other toward the exterior of the container.

[0109] Specifically, the flexible inner tank of the film container is formed by splicing multiple 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 sheet 100 are trimmed. Alternatively, any side edge of the film sheet 100 can be pressed and flattened before welding.

[0110] The above are only a few embodiments of the present application. Those skilled in the art may make various changes or modifications to the embodiments of the present application based on the contents disclosed in the application documents without departing from the spirit and scope of the present application.

Claims

1. A membrane plate comprising a plate body that is provided with a first corrugated structure, a second corrugated structure and at least one intersecting curved surface, wherein the first corrugated structure is convex and the second corrugated structure is concave, and the first corrugated structure and the second corrugated structure intersect via the intersecting curved surface; wherein a constructive curved surface is formed, which is a curved surface structure formed by parallel transfer of the first convex curve along the first concave curve with the vertex of the first convex curve sliding along the first concave curve, wherein the first corrugated structure and the second corrugated structure are designed with the possibility of intersecting with the constructive curved surface, and their intersecting lines are closed to form an intersecting curved surface.

2. The membrane plate according to claim 1, wherein the first convex curve and the first concave curve are described using the Taylor formula.

3. The membrane plate of claim 1, wherein the first convex curve is any one of a parabola, a catenary, an 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; and the first concave curve is any of a parabola, a catenary, an 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 membrane plate of claim 1, wherein the first convex curve and the first concave curve are parabolas and the intersecting curved surface is a hyperbolic paraboloid.

5. The membrane plate according to claim 1, wherein the first corrugated structure and the second corrugated structure are arranged orthogonally or at an angle to each other.

6. A membrane plate according to any one of claims 1 to 5, wherein the first corrugated structure comprises at least one first corrugation and at least one second corrugation connected to an intersecting curved surface, and the second corrugated structure comprises at least one third corrugation and at least one fourth corrugation connected to an intersecting curved surface; wherein the first corrugation is a curvilinear surface structure formed by the parallel transfer of the second convex curve along the first guide, the second corrugation is a curvilinear surface structure formed by the parallel transfer of the third convex curve along the second guide, the third corrugation is a curvilinear surface structure formed by the parallel transfer of the second concave curve along the third guide, and the fourth corrugation is a curvilinear surface structure formed by the parallel transfer of the third concave curve along the fourth guide.

7. The membrane plate of claim 6, wherein the second convex curve and the third convex curve are identical to the first convex curve; and the second concave curve and the third concave curve are identical to the first concave curve.

8. The membrane plate of claim 6, wherein the first guide is a straight line or curve located in a first plane parallel to the body of the plate; the second guide is a straight line or curve located in the second plane parallel to the plate body; the third guide is a straight line or curve located in the third plane parallel to the plate body; and The fourth guide is a straight line or curve located in the fourth plane parallel to the plate body.

9. The membrane plate of claim 8, wherein the first plane and the second plane are the same plane, and the third plane and the fourth plane are the same plane.

10. A membrane plate according to any one of claims 1 to 5, wherein the first corrugated structure is a corrugated structure continuing with a constant width, or the first corrugated structure comprises a corrugated section continuing in a tapering or diverging manner; and the second corrugated structure is a corrugated structure that continues with a constant width, or the second corrugated structure comprises a corrugated section that continues in a tapering or diverging manner.

11. The membrane plate of claim 1, wherein each of the first corrugated structure and the second corrugated structure has a span range of from 1 mm to 1000 mm.

12. The membrane plate according to claim 1, wherein the height of the convexity of the first corrugated structure and the depth of the concavity of the second corrugated structure are from 1 mm to 500 mm.

13. The membrane plate according to claim 1, wherein the thickness of the plate body is from 0.1 mm to 10 mm.

14. A method for optimizing a membrane plate, wherein the method is used to optimize the membrane plate according to any one of paragraphs 1-13 and includes: adjusting an optimization parameter to change a structural parameter of the membrane plate, wherein the optimization parameter is at least one parameter in mathematical expressions of the first corrugated structure, the second corrugated structure and the intersecting curved surface; obtaining the operating parameter of the membrane plate; and repeating the above steps until the operating parameter reaches the set value.

15. The method for optimizing a membrane plate according to claim 14, wherein the mathematical expression of the intersecting curved surface is a mathematical equation of a hyperbolic paraboloid, and the optimization parameter contains at least one constant in the mathematical expression of the intersecting curved surface.

16. The method for optimizing the membrane plate of claim 14, wherein the structural parameter comprises dimensions, shapes, curvatures, ridge heights, trough depths, and / or maximum spans of the first corrugated structure, the second corrugated structure, and the intersecting curved surface.

17. The method for optimizing the membrane plate of claim 14, wherein the operating parameter includes the displacement compensation capability, strength, fatigue characteristics, and / or progressive deformation characteristics of the first corrugated structure, the second corrugated structure, and the intersecting curved surface.

18. The method for optimizing a membrane plate according to claim 14, wherein the step of obtaining the operating parameter of the membrane plate comprises: creating a three-dimensional model of the membrane plate in accordance with the adjusted optimization parameter and the mathematical expression of the intersecting curved surface; and obtaining the operating parameter of the membrane plate by performing a simulation calculation using a three-dimensional model.

19. The method for optimizing a membrane plate according to claim 14, wherein after the operating parameter reaches a predetermined value, the method also includes: processing the membrane plate in accordance with the optimization parameter finally determined by means of adjustment and the target mathematical expression of the intersecting curved surface.

20. A membrane container containing at least one membrane plate according to any one of paragraphs 1-13.