CN112836253A - Data structure of plate geometric model - Google Patents
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Abstract
The invention discloses a data structure of a plate geometric model, which comprises N plate geometric data objects and N plate non-geometric data objects, wherein the data structure of the plate geometric data objects at least comprises a project number, a plate number and a sub-object. The invention creates different geometric data objects and non-geometric data objects of the plate to be used as carriers of various data information of the geometric model of the plate, establishes corresponding geometric data and non-geometric data information for various characteristics of the geometric model, constructs a relatively fixed data structure according to the established data information so as to be convenient for storing, exchanging data and operating data, calling a third-party interface and providing various geometric information and non-geometric information of the surface material.
Description
Technical Field
The invention relates to the technical field of data structures of geometric models, in particular to a data structure of a plate geometric model.
Background
In modern building engineering design, it is important to create a geometric model of each "plate", and data of the geometric model of the "plate" is also an important basis for concrete construction. The creation of geometric models of "sheet materials" currently relies heavily on CAD software. However, a geometric model of a plate is expressed by multiple lines (PolyLine) or area (Region) or three-dimensional surfaces (3DFace) adopted in the traditional CAD, so that a carrier capable of storing necessary non-geometric information is lacked in a single mode, and when the information such as the front and back directions of a panel, the front and back directions of the edge line of the panel, the accessory construction mode of the panel and the like are required to be called for creating the geometric model of the plate, storage, data exchange and data operation are inconvenient, and the geometric model of the plate cannot be completely embodied.
In order to solve the defects of the traditional CAD software, a geometric model data structure with complete geometric data and non-geometric data of the plate is provided.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned deficiencies of conventional CAD software in the background art, and now to provide a geometric model data structure having complete geometric and non-geometric data of a sheet material.
A data structure of a plate geometric model comprises N plate geometric data objects and N plate non-geometric data objects, wherein the data structure of the plate geometric data objects at least comprises item numbers, plate numbers and sub-objects; wherein the child objects include:
and the child point objects are used for forming all the vertexes of the geometric model, and the number of all the vertexes of the geometric model is in one-to-one correspondence with the number of the child point objects.
And the sub-line objects are used for forming all lines of the geometric model, and the number of all the lines of the geometric model corresponds to the number of the sub-line objects one to one.
And the sub-surface objects are used for forming all surfaces of the geometric model, and the number of all the surfaces of the geometric model is in one-to-one correspondence with the number of the sub-surface objects.
Preferably, the data structure of the child object is composed of point identifications and point coordinates; the data structure of the sub-line object consists of a line identifier, a starting point end point, an end point, a first adjacent surface, a second adjacent surface, a surface included angle and an angle code; the data structure of the child face object consists of face identification, area, face forward direction, weight, and face material.
Preferably, N in the N sheet geometric data objects and the N sheet non-geometric data objects is greater than or equal to 1, and 1 sheet geometric data object and 1 sheet non-geometric data object correspond to 1 sheet geometric model together.
Preferably, the point identifier is used for sub-point object identification or distinction, and the data structure of the point identifier is a set of names, numbers, and letters and/or codes of the identifiers.
The point coordinates are used for determining the coordinate position of the sub-point object in the CAD, and the data structure of the point coordinates is a set of coordinate values in a world coordinate system and coordinate values in a current user coordinate system.
Preferably, the line identifier is used for identifying or distinguishing the sub-line object, and the data structure of the line identifier is a set of name, number, and/or letter of the identifier of the sub-line object.
The starting point end point and the end point are two end points forming the sub-line object, and the starting point end point and/or the end point are used for judging the directions of the sub-line object and the sub-point object.
The first adjacent surface and the second adjacent surface are two adjacent surfaces of a sub-line object formed by the intersection of two intersecting surfaces of the geometric model, and the first adjacent surface and/or the second adjacent surface are/is used for judging the directions of the sub-line object and the sub-surface object.
The surface included angle is the intersection angle of two adjacent surfaces of the sub-line object on one side of the positive direction of the surface, the surface included angle comprises an external angle and an internal angle, the external angle is larger than 180 degrees, and the internal angle is smaller than 180 degrees.
Preferably, the sub-surface object is a single plane or curved surface divided by a contour line and a bending line on the physical meaning of the plate, and the data structure of the surface identifier is a set of characters and/or codes for identifying or distinguishing the name, number and identifier of the sub-surface object.
The area is the geometric area of the sub-surface objects, and the sum of the areas of all the sub-surface objects forming the plate is used as a reference value for calculating the area of the plate.
The positive direction of the surface is the positive direction of the molding surface appointed by the user, and the positive direction of the surface is stored through more than 3 vertex fields which form the sub-surface object and are arranged in order.
The weight is the weight characteristic of the sub-surface object in the physical sense, and the sum of the weights of all the sub-surface objects forming the plate is used as a reference value for calculating the weight of the plate; the weight calculation method comprises the following steps:
area x material density ﹦ weight
The facing material is a physical characteristic of a sheet material that includes material density data used to calculate the weight of the sub-facing object.
Preferably, the data structure of the plate non-geometric data object is composed of data structures of a sub-flanging object, a sub-fixing object and a sub-reinforcing rib object.
Preferably, the data structure of the sub-flanging object consists of flanging width, flanging length, flanging angle, bending welding, whether to open a groove, groove bottom width, whether to have a reinforcing rib, reinforcing rib edge distance and reinforcing rib width; bend welding and whether fluting and whether have the strengthening rib as user's selectivity data structure, wherein:
the hemming width is the dimension or data of the sub-hemming object in the width direction.
The folding length is the folding range of the sub-folding object, and the data structure of the folding length consists of the initial blank length, the folding bending length and the final blank length of the sub-folding object.
The edge folding angle is an included angle of the sub edge folding object and the adjacent sub surface object on one side of the back surface of the plate, and the sum of the edge folding angle and the surface included angle is 360 degrees of the circumference.
The groove bottom width is the groove bottom size or data of the bending wire groove of the sub-flanging object.
The edge distance of the reinforcing ribs is the distance from the reinforcing ribs of the sub-flanging object to the sub-line object.
The width of the reinforcing rib is the width size or data of the reinforcing rib of the sub-flanging object.
Preferably, the sub-fixing piece object is a plate surface edge fixing piece, and the data structure of the sub-fixing piece object consists of a fixing piece pattern and a fixing piece arrangement positive direction; the data structure of mounting pattern comprises mounting type, mounting size, mounting interval and mounting location size of arranging, wherein:
the type of the fixing piece is a character mark or a number mark of the sub-fixing piece object.
The size of the fixing piece is the external dimension of the sub-fixing piece object, and is the width, the length and the size or the data of the gap of the sub-fixing piece object.
The fixing piece arrangement distance is size data of the arrangement distance between adjacent sub fixing piece objects.
The fixture positioning size is a size or data that determines a spatial positional relationship between the sub-fixture object and the plate.
The arrangement positive direction of the fixing pieces is positive direction data of the sub-fixing piece objects arranged along the edge line of the plate or the folding line of the sub-folding edge object and the starting point end point and the end point of the reference sub-line object.
Preferably, the sub-reinforcing rib object is a reinforcing rib of the sub-surface object, and the data structure of the sub-reinforcing rib object is composed of a reinforcing rib pattern, a reinforcing rib arrangement direction and a reinforcing rib weight; the data structure of the reinforcing rib pattern consists of reinforcing rib types, reinforcing rib section sizes, reinforcing rib lengths and reinforcing rib arrangement rooms; wherein:
the reinforcing rib type is a character identifier or data for identifying the material and type of the sub reinforcing rib object.
The cross section dimension of the reinforcing rib is the cross section outline dimension of the sub reinforcing rib object, and the cross section dimension of the reinforcing rib comprises the width, depth, thickness, radius and limb length of the sub reinforcing rib object;
the length of the reinforcing rib is the external dimension of the section of the sub reinforcing rib object, and the length of the reinforcing rib comprises the length of the sub reinforcing rib object in the length direction, the end corner cutting length, the corner cutting angle, the end milling notch depth and the processing dimension of the milling notch length;
the arrangement distance of the reinforcing ribs is the quantity data of the sub reinforcing rib objects, and the size data of the initial variable distance of the arrangement of the reinforcing ribs, the termination variable distance of the arrangement of the reinforcing ribs and the arrangement distance between the adjacent sub reinforcing rib objects.
The weight of the reinforcing rib is the physical characteristic data of the weight of the sub reinforcing rib object, and the data structure of the weight of the reinforcing rib comprises the data of net weight and gross weight; wherein, the formula for calculating the weight of the reinforcing rib is as follows:
sub-bar object cross-sectional area x sub-bar object length x material density ﹦ bar weight
The arrangement direction of the reinforcing ribs is the arrangement direction of the sub reinforcing rib objects in the model; the arrangement mode of the arrangement direction of the reinforcing ribs comprises a geometric model arrangement mode and a data object arrangement mode; the geometric model format arrangement mode comprises the following modes:
the first method is as follows: the sub-stiffener objects are arranged perpendicular to any of the sub-line objects forming the sub-surface object.
The second method comprises the following steps: the sub-stiffener objects are arranged parallel to any of the sub-line objects forming the sub-surface object.
The third method comprises the following steps: the sub-stiffener objects are arranged in the shortest span direction within the sub-object.
The data object format arrangement mode comprises the following modes:
the first method is as follows: the sub-stiffener objects are arranged in a combination of information defining the "vertical" of the geometric design with the identity of any one of the sub-line objects that make up the sub-surface object.
The second method comprises the following steps: the sub-stiffener objects are arranged in a combination of information defining the identity of any sub-line object making up the sub-surface object in a "parallel" of geometric design.
The third method comprises the following steps: the sub-reinforcing rib objects are arranged by combining the definition of the shortest span designed by the geometric figure and a vector parallel to the direction of the shortest span in the sub-surface object.
The data structure of the reinforcing rib fixing piece is a set of the type, size, dimension and arrangement distance of the reinforcing rib fixing piece.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention creates different geometric data objects and non-geometric data objects of the plate to be used as carriers of various data information of the geometric model of the plate, establishes corresponding geometric data and non-geometric data information for various characteristics of the geometric model, constructs a relatively fixed data structure according to the established data information so as to facilitate storage, data exchange and data operation, and call a third-party interface, thereby providing various geometric information and non-geometric information of the surface material.
Drawings
FIG. 1 is a block diagram of the overall data structure of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
Examples
As shown in fig. 1, a data structure of a geometric plate model of the present embodiment includes N geometric plate data objects and N non-geometric plate data objects. Specifically, N in the N plate geometric data objects and the N plate non-geometric data objects is larger than or equal to 1, and 1 plate geometric data object corresponds to 1 plate geometric model. The data structure of the sheet geometry data object comprises at least an item number, a sheet number and a sub-object. The plate geometric data object is a virtual carrier for data transmission and storage of the item numbers, the plate numbers and the sub-objects of the plate geometric model. Wherein the child objects include:
and the child point objects are used for forming all the vertexes of the geometric model, and the number of all the vertexes of the geometric model is in one-to-one correspondence with the number of the child point objects. The child Point objects specifically correspond to the sharp points of the physical panel appearance shape, and meanwhile, the child Point objects correspond to the Point (Point) primitives of the model in the CAD.
And the sub-line objects are used for forming all lines of the geometric model, and the number of all the lines of the geometric model corresponds to the number of the sub-line objects one to one. The sub-line object corresponds to the physical characteristics of the contour line, the bending line and the like of the appearance of the plate, and further perfects the determination of the appearance shape of the plate. The sub-Line object also corresponds to a Line (Line) primitive of the model in the CAD, and the sub-Line object primitive can be used for constructing a contour Line, a bending Line and a welding process Line of the model. Meanwhile, the characteristics of the positive and negative directions of the line in physics can be defined by the two end points of the sub-line object.
And the sub-surface objects are used for forming all surfaces of the geometric model, and the number of all the surfaces of the geometric model is in one-to-one correspondence with the number of the sub-surface objects. The sub-surface object is a single plane or a curved surface of which the surface is divided by a contour line and a bending line in the physical sense of the plate. Meanwhile, the child surface image may also correspond to a "surface (Region)" primitive of the model in the CAD. In a specific use, the sub-surface object is used for reflecting physical characteristics of the plate, such as appearance, surface, reinforcing ribs (back ribs) attached to the surface, positive and negative directions of the surface, and the panel of the plate has 2 positive and negative surfaces, generally speaking, a customer can specify to use one of the surfaces for realizing a desired function and effect, and in this embodiment, the positive direction of the sub-surface object is equal to the using side direction of the surface and also equal to the spraying side direction of the surface.
Preferably, the data structure of the project number is composed of a data structure of the project name and/or project name of the plate material. The concrete meaning of the item number is that the plate is applied to which project or project, and the field type preferentially adopted by the item number is as follows: a text; the field lengths are: 256 characters.
Preferably, the data structure of the plate number is composed of a data structure of a plate number and/or a plate name, specifically, the name, number, identification, etc. of the plate is used for identifying or distinguishing the characters or codes of the panel. The field types preferentially adopted by the plate number are as follows: text, field length: 256 characters.
Preferably, the data structure of the child object is composed of point identifications and point coordinates, wherein:
the data structure of the point identifier is the name, the number and the character and/or code number set of the identifier of the sub-point object. The preferred field type of the point identifier is as follows: text, field length: 64 characters. In a specific use-point identifier, an integer sequence number may also be used, and the field types are: integer, field type is: 8 bits. Or the point identification adopts a Handle (Handle) of the point graphic element in the CAD, and the field type is as follows: text, field length: 256 characters.
And point coordinates used for determining the coordinate position of the sub-point object in the CAD, wherein the data structure of the point coordinates is a set of coordinate values in a world coordinate system and coordinate values in a current user coordinate system. The preferred field types of the point coordinate are: floating point number, field length: 128 bits. The types of fields that may be employed in some high-level programming languages are: coordinate/3-dimensional coordinate, field length: and (4) automatic.
Preferably, the data structure of the child line object is composed of a line identifier, a starting point end point, an end point, a first adjacent surface, a second adjacent surface, a surface angle and an angle code, wherein:
and the line identifier is used for identifying or distinguishing the sub-line object, and the data structure of the line identifier is a set of the name, the number and the character and/or code number of the sub-line object. The preferred field types of the line identifier are: text, field length: 64 characters. The line identifier can also adopt integer sequence numbering according to the requirement in specific use, and the field type of the line identifier is adjusted as follows: integer, field length adjusted to: 8 bits; or the 'Handle' of the line primitive in the CAD is adopted, and the field type is adjusted as follows: text, field length is adjusted to: 256 characters.
And a starting point end point, which is one of two end points constituting the child line object, for determining the directions of the child line object and the child point object. In specific use, the line can be traced back through the starting point end point, and the starting point end point can also be traced back from the line. The starting point end point corresponds to the definition of the starting point of the line drawing element in the CAD. The preferred field types adopted by the starting point end point are as follows: point identification of child point objects. In a specific use, the starting point and the end point may also adopt the point coordinates of the child point object, and the field type of the starting point and the end point is adjusted to be: coordinate/3-dimensional coordinate, field length: automatic; meanwhile, the starting point endpoint may also adopt a Handle (Handle) of the point primitive in the CAD, and the field type is adjusted as follows: text, field length is adjusted to: 256 characters.
The end point is two of two end points constituting the child line object, and the start point end point is used for determining the directions of the child line object and the child point object. In particular use, a line can be traced through the endpoint, or from a line to the endpoint. The termination point corresponds to the definition of the termination point of the line drawing element in the CAD. The preferred field types used by the endpoint are: point identification of child point objects. In a specific use, the starting point and the end point may also adopt the point coordinates of the child point object, and the field type of the starting point and the end point is adjusted to be: coordinate/3-dimensional coordinate, field length: automatic; meanwhile, the starting point endpoint may also adopt a Handle (Handle) of the point primitive in the CAD, and the field type is adjusted as follows: text, field length is adjusted to: 256 characters.
And the first adjacent surface is one of two adjacent surfaces of the sub-line object formed by the intersection of the two intersecting surfaces of the geometric model, and is used for judging the directions of the sub-line object and the sub-surface object, so that the sub-line object and the sub-surface object can be traced back mutually. The first adjacent surface also corresponds to a surface primitive in the CAD model, and the first adjacent surface preferably uses the field types: a facet identification of the sub-facet object. In specific use, the first adjacent surface can be realized by adopting a Handle (Handle) of a surface primitive in CAD, and the field types are as follows: text, field length: 256 characters.
And the second adjacent surface is two adjacent surfaces of the sub-line object formed by the intersection of the two intersecting surfaces of the geometric model, and the second adjacent surface is used for judging the directions of the sub-line object and the sub-surface object. The second adjacent surface preferably adopts the field types as follows: a facet identification of the sub-facet object. When the type of the sub-line object is a folding line, the first adjacent surface is the edge of the corresponding model of the sub-line object, and the first adjacent surface of the line is degenerated into the folding edge at the moment, so that the field is left empty. The second adjacent surface may also be adjusted in use to be a "Handle" of the surface primitive in CAD, with field types: text, field length: 256 characters.
The surface included angle is the intersection angle of two adjacent surfaces of the sub-line object on one side of the positive direction of the surface, and the field type preferentially adopted by the surface included angle is as follows: floating point number, field length: 8 bits. According to the geometry, the dihedral angle of two adjacent surfaces is obtained, then the mutual peripheral angle of the dihedral angle or the dihedral angle is obtained according to which side the spraying surface is positioned, the included angle of the surfaces comprises an external angle and an internal angle, the external angle is larger than 180 degrees, and the internal angle is smaller than 180 degrees. When the sub-line is a folding line, the surface included angle is the intersection angle of the adjacent surface and the folding edge on the spraying side, and when the folding line without the folding edge is not provided, the surface included angle is a null value.
Preferably, the data structure of the child-side object consists of a side identification, an area, a side positive direction, a weight, and a surface material, wherein:
the surface mark is a set of names, numbers and characters and/or codes for identifying or distinguishing the sub-surface objects. The preferred field types of the face identifier are: text, field length: 64 characters. The field type and field length that the face identification preferably adopts can also be adjusted according to the specific situation in use, such as: the face identification is realized by integer sequence numbering, and the field type is adjusted as follows: integer, field type is adjusted to: 8 bits; or the surface identification is realized by adopting a Handle (Handle) of a surface graphic element in CAD, and the field types are as follows: text, field length is adjusted to: 256 characters.
And the area is the geometric area of the sub-surface objects, and the sum of the areas of all the sub-surface objects forming the plate is used as a reference value for calculating the area of the plate. The field types preferentially adopted by the area are as follows: floating point number, field length: 32 bits. In a particular use, the area of the flap adjacent to the child-surface object may also be taken into account, or the area of half of the flap adjacent to the child-surface object may be taken into account, or the "suit-cutting area" of the flap adjacent to the child-surface object may be taken into account, with the field type being adjusted to: floating point number, field length adjusted to: 32 bits.
The positive face direction is the positive direction of the user-specified mold surface, and is stored by the top fields of more than 3 ordered arrays constituting the child face object. In this embodiment, 3 vertex fields in ordered arrangement are preferentially adopted for storage, and the 3 vertex fields are all point identifiers of child point objects. Specifically, when the positive face direction is created, the positive face direction is defined in an ordered arrangement conforming to the "right-hand rule". In specific use, the 3 vertex in-field types can be realized by using a Handle (Handle) of a surface primitive in CAD, and the field lengths are as follows: 256 characters. Or the 3 vertex fields are realized by adopting the coordinates of 3 child point objects, and the field lengths are as follows: and (4) automatic.
The weight is the physical weight characteristic of the sub-surface object, and the sum of the weights of all the sub-surface objects forming the plate is used as a reference value for calculating the weight of the plate; the weight calculation method comprises the following steps:
area x material density ﹦ weight
The field types preferentially adopted by the weight are as follows: floating point number, field length: 32 bits. In particular uses, weight data for the bead and/or rib to which the sub-surface image is attached may also be written into the data structure for that weight.
Meanwhile, the face material is a physical property of a plate material, wherein the face material includes material density data for calculating the weight of the sub-face object.
Preferably, the data structure of the plate non-geometric data object is composed of a sub-flanging object, a sub-fixing object and a sub-reinforcing rib object. The plate non-geometric data object is a virtual carrier for data transmission and storage of the flanging object, the sub-fixing object and the sub-reinforcing rib object of the plate geometric model.
The data structure of the sub-flanging object consists of flanging width, flanging length, flanging angle, bending welding, whether to open a groove, groove bottom width, whether to have a reinforcing rib, reinforcing rib edge distance and reinforcing rib width. Bend welds and whether to slot and whether to have ribs as user-selectable data structures.
The hemming width is the size or data of the sub-hemming object in the width direction, and the preferential field type of the hemming width is as follows: floating point number, field length: 8 bits.
And the folding length is the folding range of the sub-folding object, and the data structure of the folding length consists of the initial blank length, the folding bending length and the final blank length of the sub-folding object.
And the folding angle is the included angle of the sub-folding object and the adjacent sub-surface object on one side of the back surface of the plate, and the sum of the folding angle and the surface included angle is 360 degrees of the circumference. The preferential field types of the flanging angle are as follows: point number, field length: 8 bits.
And (3) bending and welding, namely adopting a bending or welding process for the corresponding folded edge, wherein the bending and welding are used as a client self-option data structure. The bending welding preferentially adopts the field types as follows: text, field length: 8 characters.
Whether to open the slot or not is determined, and a data structure of whether to adopt the slot-bending process or not is selected by a customer. The field types of whether slotting is preferentially adopted are as follows: and (4) Boolean. The types of fields still used for whether or not to slot in a particular use are: text, field length is 64 characters.
The groove bottom width is the groove bottom size or data of the bending wire groove of the sub-flanging object, and the field type preferentially adopted by the groove bottom width is as follows: floating point number, field length: 8 bits.
Whether reinforcing ribs exist or not and whether the flanging adopts a data structure of the process of reinforcing rib addition or not are the data structures of the customer self-selection. If the reinforcing ribs are adopted (such as welding reinforcing ribs or adjacent edge reinforcing ribs), the types of the fields which are preferably adopted by the reinforcing ribs are as follows: a text; the field lengths are: 8 characters.
The reinforcing rib edge distance is the distance from the reinforcing rib of the sub-flanging object to the sub-line object, and the field type preferentially adopted by the reinforcing rib edge distance is as follows: a floating point number; the field lengths are: 8 bits.
The width of the reinforcing rib is the width size or data of the reinforcing rib of the sub-flanging object, and the field types preferentially adopted by the width of the reinforcing rib are as follows: floating point number, field length: 8 bits.
Preferably, the sub-fixing object is a plate surface edge fixing, and the field type preferentially adopted by the fixing style is as follows: JASON structure. The data structure of the sub-fixed part object consists of a fixed part style and a fixed part arrangement positive direction.
The fixing piece style data structure is composed of fixing piece types, fixing piece sizes, fixing piece arrangement intervals and fixing piece positioning sizes. When the method is used, a user can store the combination of several commonly used setting values as corresponding styles according to own needs, and corresponding style data can be read when the preset settings need to be used.
The type of the fixed part is a character mark or a number mark of the sub fixed part object, and the preferentially adopted field types are as follows: text, field length: and (4) automatic. The field length of the type of fixture in a particular use can also be implemented using a JASON architecture.
And the size of the fixing piece is the external dimension of the sub-fixing piece object. Specifically, the fixture size defines the width, length, and size or data of the gap of the child fixture object. The preferred field types of the fixed part size are as follows: JASON structure. In practical use, the field type of the fixed part size can be a field combination of a plurality of mixed types.
The fixing piece arrangement interval is size data of the arrangement interval between adjacent sub-fixing piece objects, and can also be used for judging the number of the sub-fixing piece objects. The field type that this mounting arrangement interval adopted preferentially is: JASON structure. In practical use, the field type of the arrangement spacing of the fixing pieces can also be a field combination of multiple mixed types.
And the fixing part positioning size is size or data for determining the spatial position relationship between the sub-fixing part object and the plate material and is used for defining a positioning value between the sub-fixing part object and the plate material. Such as: the numerical value of the distance between the sub-fixing piece object and the plate edge, the numerical value of the height from the plate surface and the like. The preferred field types of the fixed part positioning size are as follows: JASON structure. In practical use, the field type of the positioning size of the fixing piece can also be a field combination of a plurality of mixed types.
And the positive direction of the arrangement of the fixing pieces is positive data of the arrangement of the sub-fixing piece objects along the edge line of the plate or the folding line of the sub-folding edge object and the starting point end point and the end point of the reference sub-line object. Specifically, the positive fastener arrangement direction is used to define the direction from which end (start) to which end (end) the sub-fastener objects are arranged when arranged along the sheet hemline (edge line). The arrangement direction of the sub-fixed part objects is not directly connected with the positive and negative directions of the lines on the model in the CAD, and in the attributes of the sub-line objects, two end points of the sub-line objects are determined: the method comprises the steps that a starting point end point and an end point are used as a starting point and an end point in the geometric sense of a sub-line object, the two end points are used for defining the positive direction of the arrangement of the sub-fixing piece object, the attributes of the starting point end point in the geometric sense of the two end points are ignored, the two end points are respectively stored by two ordered fields, and the sequence characteristics of the ordered fields represent that the positive direction of the arrangement of the fixing piece points to the other ordered field from one ordered field. Wherein, one of them field that this mounting arranged the positive direction is: the point identification of the child point object and this field is used to define the starting end (terminating end) of the positive direction. The other field of the positive direction of the arrangement of the fixing piece is as follows: another point of the child object is identified and this field is used to define the terminating end (starting end) of the positive direction. In specific use, the two fields of the positive direction of the arrangement of the fixing piece can also adopt a Handle (Handle) of the CAD middle surface primitive, and the field type of the positive direction of the arrangement of the fixing piece is as follows: text, field length: 256 characters.
Preferably, the sub-stiffener object is a stiffener of the sub-surface object, and the data structure of the sub-stiffener object is composed of a stiffener pattern, a stiffener arrangement direction, and a stiffener weight.
The data structure of the reinforcing rib pattern is composed of reinforcing rib types, reinforcing rib section sizes, reinforcing rib lengths and reinforcing rib arrangement rooms. Specifically, the data structure of the reinforcing rib pattern is composed of a reinforcing rib type, a reinforcing rib section size, a reinforcing rib length and a reinforcing rib arrangement interval. The data structure of the reinforcing rib pattern can be adjusted according to the requirements of users, and the field types preferably adopted by the reinforcing rib pattern are as follows: JASON structure.
The reinforcing rib type is a character identifier or data for identifying the material and the type of the sub reinforcing rib object. The type of the reinforcing rib is calculated by corresponding software according to the material and a preset material density table through the density data of the material. Specifically, the data structure of the reinforcing rib type is obtained by preferentially adopting two field types, wherein one field type is as follows: text, field length: automatic; the other field type is: floating point number, field length: 8 bits. The data structure of the type of the reinforcing bar in use can also be realized by adopting two same fields, wherein the field types are as follows: JASON structure.
And the reinforcing rib section dimension is the data of the section external dimension of the sub reinforcing rib object, and the reinforcing rib section dimension comprises the width, depth, thickness, radius and limb length dimensions of the sub reinforcing rib object. The data precision of the section size of the reinforcing rib can reach the processing and manufacturing of the reinforcing rib for the plate. The field types preferentially adopted by the section size of the reinforcing rib are as follows: JASON structure. The field type of the section size of the reinforcing rib can be adjusted according to the actual software interface. For example, the field type of the section size of the reinforcing bar can be adjusted as follows: a variety of mixed types of field combinations.
And the data of the length of the reinforcing rib is the external dimension of the interface of the sub reinforcing rib object. The length of the reinforcing rib comprises the length of the sub reinforcing rib object in the length direction, the end corner cut length, the corner cut angle, the end milling notch depth and the processing size of the milling notch length. The field types preferentially adopted by the length of the reinforcing rib are as follows: JASON structure. In actual use, the field type of the length of the reinforcing rib can be adjusted as follows: a variety of mixed types of field combinations.
The arrangement distance of the reinforcing ribs is the data of the number of the sub reinforcing rib objects, the initial variable distance of the arrangement of the reinforcing ribs, the termination variable distance of the arrangement of the reinforcing ribs and the size data of the arrangement distance between the adjacent sub reinforcing rib objects. The field type that this strengthening rib interval of arranging preferentially adopted does: JASON structure. In actual use, the field type of the arrangement distance of the reinforcing ribs can be adjusted as follows: a variety of mixed types of field combinations.
And the weight of the reinforcing bar is physical characteristic data of the weight of the sub reinforcing bar object, and the data structure of the weight of the reinforcing bar comprises data of net weight and gross weight. The field types preferentially adopted by the weight of the reinforcing rib are as follows: floating point number, field length: 8, wherein the weight of the reinforcing rib is calculated according to the formula:
sub-bar object cross-sectional area x sub-bar object length x material density ﹦ bar weight
And the arrangement direction of the reinforcing ribs is the arrangement direction of the sub reinforcing rib objects in the model. Specifically, the arrangement direction of the reinforcing ribs can be arranged in two formats, namely a geometric model and a data object in use; the geometric model format arrangement mode comprises the following modes:
the first method is as follows: the sub-stiffener objects are arranged perpendicular to any of the sub-line objects forming the sub-surface object.
The second method comprises the following steps: the sub-stiffener objects are arranged parallel to any of the sub-line objects forming the sub-surface object.
The third method comprises the following steps: the sub-stiffener objects are arranged in the shortest span direction within the sub-object. Specifically, according to the geometric shape and the size of the sub-surface object and the algorithm with the shortest stress span, the sub-reinforcing rib objects are arranged in the direction of the shortest span in the sub-surface object after the direction of the shortest span is calculated.
Meanwhile, the data object format arrangement mode comprises the following modes:
the first method is as follows: the sub-stiffener objects are arranged in a combination of information defining the "vertical" of the geometric design with the identity of any one of the sub-line objects that make up the sub-surface object. When the mode of the arrangement method is adopted, the arrangement direction of the reinforcing ribs is realized by adopting two fields, wherein one field is a field defined in a vertical mode, and the field type preferentially adopted by the field is as follows: text, field length: 64 characters. The other field is the field of the identified information, and the field type preferentially adopted by the field is as follows: child line object identification, the field type of the field at a particular time of use may be adjusted to: JASON structure. The "vertical" of the geometric design in this manner is defined as one line intersecting another at 90 ° as is well known to those skilled in the art.
The second method comprises the following steps: the arrangement of the sub-stiffener objects is achieved in the "parallel" definition of the geometric design, and the combination of information from the identification of any one of the sub-line objects that make up the sub-surface object. When the mode of the arrangement method is adopted, the arrangement direction of the reinforcing ribs is realized by adopting two fields, wherein one field is a field defined in parallel, and the field type preferentially adopted by the field is as follows: text, field length: 64 characters. The other field is the field of the identified information, and the field type preferentially adopted by the field is as follows: child line object identification, the field type of the field at a particular time of use may be adjusted to: JASON structure. The "parallel" design of the geometry in this manner is defined as the relationship between two straight lines on a plane, two planes of space, or a straight line of space and a plane when they do not intersect, as is well known to those skilled in the art.
The third method comprises the following steps: the sub-reinforcing rib objects are combined with a vector parallel to the direction of the shortest span in the sub-surface object to realize arrangement by the definition of the shortest span designed by the geometric figure. When the mode of the arrangement method is adopted, the arrangement direction of the reinforcing ribs is realized by adopting two fields, wherein one field is defined as the shortest span, and the field type preferentially adopted by the field is as follows: text, field length: 64 characters. The other field is a vector field, and the field type preferentially adopted by the field is as follows: vector object or 3-bit coordinate, field length: automatically, the field type of the field at the specific time of use can be adjusted to: JASON structure. The "shortest span" of a geometric design in this manner is defined as the span from one point to the shortest distance of each point of the geometric design, as is well known to those skilled in the art.
The strengthening rib mounting, for the type of strengthening rib mounting, size, the set of arranging the interval, the data structure field that this strengthening rib mounting preferred adopted does: data of child anchor objects.
The invention creates different geometric data objects and non-geometric data objects of the plate to be used as carriers of various data information of the geometric model of the plate, establishes corresponding geometric data and non-geometric data information for various characteristics of the geometric model, constructs a relatively fixed data structure according to the established data information so as to facilitate storage, data exchange and data operation, and call a third-party interface, thereby providing various geometric information and non-geometric information of the surface material.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A data structure of a plate geometric model is characterized by comprising N plate geometric data objects and N plate non-geometric data objects, wherein the data structure of the plate geometric data objects at least comprises item numbers, plate numbers and sub-objects; wherein the child objects include:
the child point objects are used for forming all vertexes of the geometric model, and the number of all vertexes of the geometric model is in one-to-one correspondence with the number of the child point objects;
the sub-line objects are used for forming all lines of the geometric model, and the number of all the lines of the geometric model corresponds to the number of the sub-line objects one to one;
and the sub-surface objects are used for forming all surfaces of the geometric model, and the number of all the surfaces of the geometric model is in one-to-one correspondence with the number of the sub-surface objects.
2. The data structure of a geometric model of sheet material according to claim 1, wherein the data structure of the sub-point object is composed of point identification and point coordinates; the data structure of the sub-line object consists of a line identifier, a starting point end point, an end point, a first adjacent surface, a second adjacent surface, a surface included angle and an angle code; the data structure of the child face object consists of face identification, area, face forward direction, weight, and face material.
3. The data structure of a geometric plate model according to claim 2, wherein N of the N geometric plate data objects and the N non-geometric plate data objects is greater than or equal to 1, and 1 geometric plate data object and 1 non-geometric plate data object correspond to 1 geometric plate model.
4. The data structure of geometric model of plate material as claimed in claim 3, wherein the point identifier is used for identification or distinction of sub-point objects, and the data structure of the point identifier is a collection of names, numbers and letters and/or codes of the sub-point objects;
the point coordinates are used for determining the coordinate position of the sub-point object in the CAD, and the data structure of the point coordinates is a set of coordinate values in a world coordinate system and coordinate values in a current user coordinate system.
5. A geometric sheet material model data structure according to claim 4, wherein the line identification is used for identification or distinction of a sub-line object, the line identification being a collection of names, numbers, letters and/or codes of the sub-line object;
the starting point end point and the end point are two end points forming the sub-line object, and the starting point end point and/or the end point are used for judging the directions of the sub-line object and the sub-point object;
the first adjacent surface and the second adjacent surface are two adjacent surfaces of a sub-line object formed by the intersection of two intersecting surfaces of the geometric model, and the first adjacent surface and/or the second adjacent surface are/is used for judging the directions of the sub-line object and the sub-surface object;
the surface included angle is the intersection angle of two adjacent surfaces of the sub-line object on one side of the positive direction of the surface, the surface included angle comprises an external angle and an internal angle, the external angle is larger than 180 degrees, and the internal angle is smaller than 180 degrees.
6. The data structure of the geometric model of plate material as claimed in claim 5, wherein the sub-surface object is a single plane or curved surface divided by a contour line or a bending line on the physical meaning of the plate material, and the data structure of the surface identifier is a set of characters and/or codes for identifying or distinguishing the name, number and identifier of the sub-surface object;
the area is the geometric area of the sub-surface object, and the sum of the areas of all the sub-surface objects forming the plate is used as a reference value for calculating the area of the plate;
the positive direction of the surface is the positive direction of the molded surface appointed by the user, and the positive direction of the surface is stored through more than 3 top point fields which form the sub-surface object and are arranged in order;
the weight is the weight characteristic of the sub-surface object in the physical sense, and the sum of the weights of all the sub-surface objects forming the plate is used as a reference value for calculating the weight of the plate; the weight calculation method comprises the following steps:
area x material density ﹦ weight
The facing material is a physical characteristic of a sheet material that includes material density data used to calculate the weight of the sub-facing object.
7. The data structure of a geometric model of a sheet according to claim 6, wherein the data structure of the non-geometric data object of a sheet is composed of data structures of a sub-hemming object, a sub-fixing object, and a sub-reinforcing rib object.
8. The data structure of the geometric model of a plate according to claim 7, wherein the data structure of the sub-flanging object consists of flanging width, flanging length, flanging angle, bending welding, whether to notch, groove bottom width, whether to have reinforcing ribs, reinforcing rib margin and reinforcing rib width; the bending welding, whether slotting is performed or not and whether reinforcing ribs exist or not are used as user selective data structures; wherein:
the folding width is the size or data of the sub-folding object in the width direction;
the folding length is the folding range of the sub-folding object, and the data structure of the folding length consists of the initial blank length, the folding bending length and the final blank length of the sub-folding object;
the edge folding angle is an included angle of the sub edge folding object and the adjacent sub surface object on one side of the back surface of the plate, and the sum of the edge folding angle and the surface included angle is 360 degrees of the circumference;
the groove bottom width is the groove bottom size or data of the bending wire groove of the sub-flanging object;
the edge distance of the reinforcing ribs is the distance from the reinforcing ribs of the sub-flanging object to the sub-line object;
the width of the reinforcing rib is the width size or data of the reinforcing rib of the sub-flanging object.
9. The data structure of a geometric model of a plate according to claim 8, wherein the sub-fixture object is a plate face edge fixture, and the data structure of the sub-fixture object is composed of a fixture pattern and a fixture arrangement positive direction; the data structure of the fixing piece pattern consists of a fixing piece type, a fixing piece size, a fixing piece arrangement interval and a fixing piece positioning size; wherein:
the fixing part type is a character mark or a number mark of a sub-fixing part object;
the size of the fixing piece is the external dimension of the sub-fixing piece object, and is the width and length of the sub-fixing piece object and the size or data of the gap;
the arrangement distance of the fixing pieces is size data of the arrangement distance between adjacent sub fixing piece objects;
the fixing piece positioning size is size or data for determining the spatial position relationship between the sub-fixing piece object and the plate;
the arrangement positive direction of the fixing pieces is positive direction data of the sub-fixing piece objects arranged along the edge line of the plate or the folding line of the sub-folding edge object and the starting point end point and the end point of the reference sub-line object.
10. The data structure of a geometric model of a plate according to claim 9, wherein the sub-bead objects are beads of a sub-surface object, and the data structure of the sub-bead objects is composed of bead pattern, bead arrangement direction, and bead weight; the data structure of strengthening rib pattern comprises strengthening rib type, strengthening rib cross-sectional dimension, strengthening rib length and strengthening rib between arranging, wherein:
the reinforcing rib type is a character identifier or data for identifying the material and type of the sub reinforcing rib object;
the cross section dimension of the reinforcing rib is the cross section outline dimension of the sub reinforcing rib object, and the cross section dimension of the reinforcing rib comprises the width, depth, thickness, radius and limb length of the sub reinforcing rib object;
the length of the reinforcing rib is the external dimension of the section of the sub reinforcing rib object, and the length of the reinforcing rib comprises the length of the sub reinforcing rib object in the length direction, the end corner cutting length, the corner cutting angle, the end milling notch depth and the processing dimension of the milling notch length;
the arrangement distance of the reinforcing ribs is the quantity data of the sub reinforcing rib objects, and the size data of the initial variable distance of the arrangement of the reinforcing ribs, the final variable distance of the arrangement of the reinforcing ribs and the arrangement distance between the adjacent sub reinforcing rib objects;
the weight of the reinforcing rib is the physical characteristic data of the weight of the sub-reinforcing rib object, the data structure of the weight of the reinforcing rib comprises the data of net weight and gross weight, wherein the calculation formula of the weight of the reinforcing rib is as follows:
sub-bar object cross-sectional area x sub-bar object length x material density ﹦ bar weight
The arrangement direction of the reinforcing ribs is the arrangement direction of the sub reinforcing rib objects in the model; the arrangement mode of the arrangement direction of the reinforcing ribs comprises a geometric model arrangement mode and a data object arrangement mode; the geometric model format arrangement mode comprises the following modes:
the first method is as follows: the sub reinforcing rib objects are arranged perpendicular to any sub line object forming the sub line object;
the second method comprises the following steps: the sub reinforcing rib objects are arranged in parallel to any sub line object forming the sub line object;
the third method comprises the following steps: the sub reinforcing rib objects are arranged in the shortest span direction in the sub surface object;
the data object format arrangement mode comprises the following modes:
the first method is as follows: the sub reinforcing rib objects are combined with the information of the identification of any sub line object forming the sub line object by the vertical definition of geometric figure design to realize arrangement;
the second method comprises the following steps: the sub reinforcing rib objects are combined with the information of the identification of any sub line object forming the sub line object by the 'parallel' definition of geometric figure design to realize arrangement;
the third method comprises the following steps: the sub-reinforcing rib objects are combined with a vector parallel to the direction of the shortest span in the sub-surface object to realize arrangement according to the definition of the shortest span designed by a geometric figure;
the data structure of the reinforcing rib fixing piece is a set of the type, size, dimension and arrangement distance of the reinforcing rib fixing piece.
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