Parametric modeling method for three-dimensional space angle bridge tower steel anchor box

Abstract

The invention discloses a parametric modeling method for a three-dimensional space angle bridge tower steel anchor box, and relates to the field of building design. The parametric modeling method for the three-dimensional space angle bridge tower steel anchor box comprises the following steps: establishing a knowledge engineering template of a steel anchor box unit; establishing a knowledge engineering template of a steel anchor box unit input condition; inputting the parameters of the input conditions of the multiple groups of steel anchor boxes into the knowledge engineering template of the input conditions of the steel anchor box units to obtain structural models of the multiple groups of steel anchor boxes; and performing angle correction on the structural model of the steel anchor box. According to the parametric modeling method for the three-dimensional space angle bridge tower steel anchor box, three-dimensional modeling of the bridge tower steel anchor box can be rapidly and efficiently carried out, the complex structure of the bridge tower steel anchor box is accurately presented, errors are reduced, and meanwhile, part parameters can be flexibly adjusted to carry out model modification and optimization.

Description

Technical Field

[0001] The present application relates to the field of architectural design, and in particular to a parametric modeling method for a three-dimensional spatial angle bridge tower steel anchor box. Background Art

[0002] The steel anchor box of the bridge tower is a key structural component in the production and manufacturing of steel structure bridge projects. With the increasing complexity and diversity of bridge design, the design and manufacturing requirements for the steel anchor box of the bridge tower are also becoming higher and higher.

[0003] Traditional bridge tower steel anchor box design and modeling methods often rely on two-dimensional drawings, which is not only inefficient but also prone to errors. In particular, it is difficult to accurately express and simulate the actual structure of the bridge tower steel anchor box when facing complex three-dimensional spatial angles. With the rapid development of BIM technology, three-dimensional modeling software has gradually been introduced into the field of bridge engineering. However, the existing three-dimensional modeling methods still have some limitations when dealing with bridge tower steel anchor boxes with specific spatial angles, such as cumbersome modeling process, inflexible parameter adjustment, and difficulty in rapid modification and optimization.

[0004] Therefore, a more efficient, accurate and parametric modeling method is needed to meet the production and manufacturing needs of steel structure bridge engineering. Summary of the invention

[0005] The purpose of this application is to provide a parametric modeling method for a bridge tower steel anchor box at a three-dimensional spatial angle, which can quickly and efficiently perform three-dimensional modeling of the bridge tower steel anchor box, accurately present the complex structure of the bridge tower steel anchor box and reduce the generation of errors, and at the same time flexibly adjust part parameters to modify and optimize the model.

[0006] This application is implemented as follows:

[0007] The present application provides a parametric modeling method for a three-dimensional spatial angle bridge tower steel anchor box, which comprises the following steps:

[0008] Establish the knowledge engineering template of steel anchor box unit;

[0009] Establish a knowledge engineering template for input conditions of steel anchor box units;

[0010] Inputting the parameters of multiple sets of steel anchor box input conditions into the knowledge engineering template of steel anchor box unit input conditions to obtain the structural models of multiple sets of steel anchor boxes;

[0011] Make angle correction to the structural model of the steel anchor box.

[0012] In some optional implementation schemes, establishing a knowledge engineering template for a bridge tower steel anchor box unit includes the following steps:

[0013] Establish the input conditions of the UDF template for the steel anchor box structure;

[0014] Set the steel anchor box unit control parameters;

[0015] Establish a steel anchor box family library;

[0016] Create a steel anchor box UDF template.

[0017] In some optional implementation schemes, when establishing the input conditions of the steel anchor box structure UDF template, the anchor box reference point pt1, the anchor box guide line li1, the anchor box reference plane pm1, the first anchor box joint surface pm2 and the second anchor box joint surface pm3 are used as input conditions.

[0018] In some optional embodiments, the control parameters of the steel anchor box unit include: the extension length L1 of the first force transfer plate N2 and the second force transfer plate N3, the length L2 of the cable duct N7, the length L3 of the cover plate reinforcement N6, the length L4 of the cover plate N5, the inner edge distance a between the first force transfer plate N2 and the second force transfer plate N3, the width b of the anchor plate N1, the width c of the cover plate reinforcement N6, the outer diameter φ1 of the cable duct N7, the opening diameter φ2 of the anchor plate N1, the plate thickness t1 of the anchor pad, the plate thickness t2 of the first force transfer plate N2 and the second force transfer plate N3, the plate thickness t3 of the third force transfer plate N4 and the cover plate reinforcement N6, the wall thickness t4 of the cable duct N7, the thickness t5 of the cover plate N5, and the thickness t6 of the reinforcement plate N8.

[0019] In some optional implementation schemes, establishing a steel anchor box family library includes the following steps:

[0020] The anchor box reference point pt1 is taken as the center point of the upper edge of the anchor pad N1;

[0021] Use the anchor box guide line li1 as the overall direction guide line, make the first force transmission plate N2, the second force transmission plate N3, the third force transmission plate N4, the cover plate reinforcement N6, and the cable guide tube N7 parallel to the anchor box guide line li1, and make the anchor pad N1 and the cover plate N5 perpendicular to the anchor box guide line li1;

[0022] The anchor box reference plane pm1 is used to constrain the rotation of the component along the anchor box guide line li1. The anchor pad N1, the first force transmission plate N2, the second force transmission plate N3, and the cover plate N5 are perpendicular to the anchor box reference plane pm1, and the third force transmission plate N4 and the cover plate reinforcement N6 are parallel to the anchor box reference plane pm1.

[0023] Use the first anchor box joint surface pm2 and the second anchor box joint surface pm3 to constrain the boundary contours of the first force transmission plate N2, the second force transmission plate N3, and the cover plate N5;

[0024] Introduce the set steel anchor box unit control parameters into each part to establish a steel anchor box family library.

[0025] In some optional implementation schemes, when establishing a steel anchor box UDF template, the anchor box reference point pt1, the anchor box guide line li1, the anchor box reference plane pm1, the first anchor box joint surface pm2 and the second anchor box joint surface pm3 are used as input conditions to output a part with parameters, and the parameter p1 is added and published as the number of anchor boxes that need to be generated during user feature setting.

[0026] In some optional implementation schemes, establishing a knowledge engineering template for input conditions of a steel anchor box unit includes the following steps:

[0027] The input conditions of the steel anchor box unit input condition UDF template are established, with the reference point pt2, direction line li2, reference plane XOY, reference plane XOZ, and reference plane YOZ as five input conditions; among them, the direction line li2 is parallel to the X-axis direction to distinguish the steel anchor box generation direction of the M direction and the B direction, the positive direction of the X-axis is the B direction, and the negative direction of the X-axis is the M direction;

[0028] Set the control parameters of the anchor box guide line li1, using the angle θ between the anchor box guide line li1 and the XOY plane, the angle β between the anchor box guide line li1 and the XOZ plane, and the single-value parameter p2 to distinguish the grouping of the angle values ​​between each group of steel anchor box guide lines li1 and the reference plane;

[0029] Establish a family library of input conditions for steel anchor box units; establish the reference plane XOY plane, reference plane XOZ plane, and reference plane YOZ plane with reference point pt2 as the base point; establish direction line li2 with reference point pt2 as the base point and X-axis as the direction; take XOY plane as the base plane, the projection line of anchor box guide line li1 on XOY plane is li1', and establish direction line li3 with angle θ with projection line li1' with reference point pt2 as the starting point; take XOZ plane as the base plane, the projection line of anchor box guide line li1 on XOZ plane is li1", and establish direction line li4 with angle β with projection line li1" with reference point pt2 as the starting point; fit the direction line li3 of XOY base plane and the direction line li4 of XOZ base plane into anchor box guide line li1 in space, and then check the angle γ between anchor box guide line li1 and YOZ plane, and make anchor box reference plane pm1 with anchor box guide line li1 as the outline and perpendicular to XOY plane as the direction;

[0030] The angle θ between the anchor box guide line li1 and the XOY plane, the angle β between the anchor box guide line li1 and the XOZ plane, and the single-valued parameter p2 are assigned to the part, then the single-valued parameter p2 = k1, k1 = 1~X M , k1 represents the X of the M side anchor box M data sets, single-valued parameters p2 = k2, k2 = X M +1~2X M , k2 represents the X of the anchor box on the B side M A data group is used to establish a family library of input conditions for steel anchor box units;

[0031] Use the user feature command to create a UDF template for the input conditions of the steel anchor box unit, and use the reference point pt2, direction line li2, reference plane XOY, reference plane XOZ, and reference plane YOZ as input conditions to output the anchor box guide line li1 and anchor box reference plane pm1 with parameters.

[0032] In some optional implementation schemes, inputting the parameters of multiple sets of steel anchor box input conditions into the knowledge engineering template of steel anchor box unit input conditions to obtain the structural models of multiple sets of steel anchor boxes includes the following steps:

[0033] According to the overall internal structure of the bridge tower design, multiple point coordinate value data are input and arranged in the order of anchor box numbers to generate anchor box reference point pt1 set 1;

[0034] Write a knowledge engineering array 1 script to loop call the UDF templates of multiple steel anchor box unit input conditions, and realize the batch generation of multiple groups of anchor box guide lines li1 and anchor box reference planes pm1; wherein, use the for-while statement to realize the loop, and the number of loops is set to the parameter p2 that controls the number of steel anchor box unit input conditions; use the CreateOrModifyTemplate function to realize the UDF template call of the steel anchor box unit input conditions; use the SetAttributeObject function to input the five input conditions of the reinforcement UDF template, namely, the reference point pt2, the direction line li2, the reference plane XOY, the reference plane XOZ, and the reference plane YOZ; use the SetAttributeInteger function to input the parameter i of the UDF template of the steel anchor box unit input conditions, that is, loop call the list composed of multiple parameters i, and the number of calls is the number of loops p2, i=1~p2;

[0035] Arrange the data of multiple groups of batch-generated anchor box guide lines li1 and anchor box reference planes pm1 according to the order of anchor box numbers, and put them into anchor box guide line li1 set 2 and anchor box reference plane pm1 set 3 respectively;

[0036] Extract the inner wall surface of the bridge tower as the boundary conditions of the first anchor box joint surface pm2 and the second anchor box joint surface pm3;

[0037] Write a knowledge engineering array 2 script to implement the loop call of multiple steel anchor box UDF templates to batch generate multiple groups of steel anchor box structures; wherein, the for-while statement is used to implement the loop, and the number of loops is set to the parameter p1 that controls the number of steel anchor boxes; the steel anchor box UDF template call is implemented through the CreateOrModifyTemplate function; the five input conditions of the reinforcement UDF template are input through the SetAttributeObject function, namely, the anchor box reference point pt1, the anchor box guide line li1, the anchor box reference plane pm1, the first anchor box joint surface pm2 and the second anchor box joint surface pm3, wherein the data of the anchor box reference point pt1, the anchor box guide line li1, and the anchor box reference plane pm1 are extracted in sequence from the anchor box reference point pt1 set 1, the anchor box guide line li1 set 2, and the anchor box reference plane pm1 set 3; the parameter i of the steel anchor box UDF template is input through the SetAttributeInteger function, that is, multiple set lists are looped and called, and the number of calls is the number of loops p1, i=1~p1;

[0038] Run the Knowledge Engineering Array2 script to batch generate multiple sets of parameter-based steel anchor box structural models.

[0039] In some optional implementation schemes, when the angle of the structural model of the steel anchor box is corrected, the direction change of the anchor box guide line li1 is converted into a change in the angle value between the anchor box guide line li1 and the reference plane XOY plane, XOZ plane, and YOZ plane, and the angle of the structural model of the steel anchor box is corrected by modifying the angle θ between the anchor box guide line li1 and the XOY plane and the angle β between the anchor box guide line li1 and the XOZ plane.

[0040] The beneficial effects of the present application are as follows: the parametric modeling method of the steel anchor box of the bridge tower at a three-dimensional spatial angle provided by the present application comprises the following steps: establishing a knowledge engineering template of the steel anchor box unit; establishing a knowledge engineering template of the input conditions of the steel anchor box unit; inputting the parameters of multiple sets of steel anchor box input conditions into the knowledge engineering template of the input conditions of the steel anchor box unit to obtain the structural models of multiple sets of steel anchor boxes; and performing angle correction on the structural model of the steel anchor box. The parametric modeling method of the steel anchor box of the bridge tower at a three-dimensional spatial angle provided by the present application can quickly and efficiently perform three-dimensional modeling of the steel anchor box of the bridge tower, accurately present the complex structure of the steel anchor box of the bridge tower and reduce the generation of errors, and can flexibly adjust the parameters of the parts for model modification and optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic diagram of the structure of a bridge tower using a steel anchor box modeled by a parametric modeling method of a bridge tower steel anchor box at a three-dimensional angle is provided for an embodiment of the present application;

[0043] Figure 2 A parametric modeling method for a bridge tower steel anchor box at a three-dimensional angle is provided for the embodiment of the present application, and a vertical layout diagram of a steel anchor box connected to a bridge tower is modeled;

[0044] Figure 3 A three-dimensional spatial angle schematic diagram of a steel anchor box connected to a bridge deck anchoring system modeled by a parametric modeling method of a bridge tower steel anchor box at a three-dimensional spatial angle is provided for an embodiment of the present application;

[0045] Figure 4 A three-dimensional spatial angle schematic diagram of another steel anchor box modeled by a parametric modeling method of a bridge tower steel anchor box provided in an embodiment of the present application and connected to a bridge deck anchoring system;

[0046] Figure 5 A structural schematic diagram of a first-perspective view of a steel anchor box modeled by a parametric modeling method of a bridge tower steel anchor box at a three-dimensional spatial angle is provided for an embodiment of the present application;

[0047] Figure 6 A structural schematic diagram of a second perspective of a steel anchor box modeled by a parametric modeling method of a bridge tower steel anchor box at a three-dimensional spatial angle is provided for an embodiment of the present application;

[0048] Figure 7 A schematic diagram of a partial cross-sectional structure of two steel anchor boxes installed on a bridge tower modeled by a parametric modeling method of a bridge tower steel anchor box at a three-dimensional spatial angle is provided for an embodiment of the present application;

[0049] Figure 8 A schematic flow chart of a parametric modeling method for a three-dimensional angle bridge tower steel anchor box is provided for an embodiment of the present application;

[0050] Fig. 9 A schematic diagram of an anchor box reference point pt1, an anchor box guide line li1, an anchor box reference plane pm1, a first anchor box joint surface pm2, and a second anchor box joint surface pm3 in a parametric modeling method of a steel anchor box of a bridge tower at a three-dimensional angle is provided for an embodiment of the present application;

[0051] Fig.10 A list of structural parameters of some steel anchor boxes established in the parametric modeling method of the three-dimensional spatial angle bridge tower steel anchor box in the embodiment of the present application;

[0052] Fig.11 A list of structural parameters of another part of the steel anchor box established in the parametric modeling method of the three-dimensional spatial angle bridge tower steel anchor box in the embodiment of the present application;

[0053] Fig.12 This is a schematic diagram of the UDF template for inputting conditions of the steel anchor box unit in the parametric modeling method of the steel anchor box of the three-dimensional angle bridge tower in the embodiment of the present application, with the reference point pt2, the direction line li2, the reference plane XOY, the reference plane XOZ, and the reference plane YOZ as five input conditions;

[0054] Fig.13 The parameterized modeling method of the three-dimensional angle bridge tower steel anchor box in the embodiment of the present application assigns the angle θ between the anchor box guide line li1 and the XOY plane, the angle β between the anchor box guide line li1 and the XOZ plane, and the single-valued parameter p2 to the list of parts;

[0055] Fig.14 A schematic diagram of batch generation of anchor box guide lines li1 and anchor box reference planes pm1 by using a knowledge engineering array to write a script to implement a loop call of a UDF template for inputting conditions of steel anchor box units in a parametric modeling method of a three-dimensional angle bridge tower steel anchor box in an embodiment of the present application;

[0056] Fig.15 This is a schematic diagram of using a knowledge engineering array to write a script in the parametric modeling method of a three-dimensional angle bridge tower steel anchor box in an embodiment of the present application to realize the cyclic calling of the steel anchor box UDF template to batch generate structural models of various groups of parameter-based steel anchor boxes.

[0057] In the figure: 100, bridge tower; 110, bridge tower side wall plate; 120, bridge tower inner vertical plate; 130, inclined cable plane; 140, inclined cable center line; 150, anchor point; 160, inclined cable duct top center point; 170, horizontal plane; N1, anchor plate; N2, first force transfer plate; N3, second force transfer plate; N4, third force transfer plate; N5, cover plate; N6, cover plate plus; N7, cable duct; N8, reinforcement plate. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0059] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0060] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0061] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0062] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0063] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0064] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0065] The characteristics and performance of the parametric modeling method of the three-dimensional spatial angle bridge tower steel anchor box of the present application are further described in detail below in conjunction with the embodiments.

[0066] The parametric modeling method of the three-dimensional spatial angle bridge tower steel anchor box provided in the embodiment of the present application is used to model the steel anchor box of the steel bridge tower with a three-dimensional spatial angle, such as Figure 1 As shown in the figure, the steel bridge tower is a combination of a main tower and a secondary tower in a 6-shaped structure along the bridge. The main tower and the secondary tower are arranged at an angle of 70 degrees to the horizontal plane. The main tower and the secondary tower are A-shaped in the transverse direction of the bridge and are inclined 79 degrees inward. Therefore, the steel bridge tower is a three-dimensional spatial structure as a whole and is a combination of inclinations in two directions; Figure 2 As shown in the figure, the steel anchor box structure of the steel bridge tower is located inside the bridge tower and is divided into 24 pieces on the middle span M side and 24 pieces on the side span B side. Figure 3 and Figure 4 According to the plane diagram of the cable-stayed cable, there are angles between the cable and the XOY plane, XOZ plane and YOZ plane, that is, the steel anchor box is positioned at a three-dimensional spatial angle. Each anchor box is designed at a different elevation of the steel tower to match the bridge deck anchoring system, and the installation spatial angle also changes gradually.

[0067] Steel anchor box structure Figure 5 , Figure 6 and Figure 7 As shown, the steel anchor box unit parts include an anchor pad N1, a first force transmission plate N2, a second force transmission plate N3 and a third force transmission plate N4, a cover plate N5, a cover plate reinforcement N6, a cable guide tube N7, and a reinforcement plate N8. Among them, the cable duct N7 passes through and is connected to the cover plate N5 and the bridge tower side wall plate 110, the anchor plate N1 is fixedly sleeved on the cable duct N7 and connected to one side of the cover plate N5, the first force transmission plate N2 and the second force transmission plate N3 are arranged at intervals up and down and are respectively connected to the cover plate N5, the third force transmission plate N4 is respectively connected to the first force transmission plate N2, the second force transmission plate N3 and the cover plate N5, the cover plate reinforcement N6 is connected to the cover plate N5, and the cover plate reinforcement N6 is also connected to one of the first force transmission plate N2 or the second force transmission plate N3, the reinforcement plate N8 is fixedly sleeved on the cable duct N7 and connected to the bridge tower side wall plate 110; the first force transmission plate N2, the second force transmission plate N3, the cover plate N5 and the vertical plate 120 in the bridge tower form an undisturbed oblique angle, and the cable duct N7 extends obliquely from the bridge tower side wall plate 110 and forms a non-standard incision with the bridge tower side wall plate 110 and the reinforcement plate N8.

[0068] Due to the different installation angles of each steel anchor box, the sizes of the first force transfer plate N2, the second force transfer plate N3, the cover plate N5 and the vertical plate 120 in the bridge tower are different, and the holes formed by the cable guide N7 and the side wall plate 110 and the reinforcement plate N8 of the bridge tower are also inconsistent. Because the cable forces borne by each anchor box are different, the outer diameter of each cable guide N7 will also be adjusted according to the diameter of the cable, and the length of the cable guide N7 will also change due to different installation angles. For the above reasons, it will be very cumbersome and difficult to directly model the 48 steel anchor boxes one by one. The steel bridge towers of such large-span cable-stayed bridges are usually constructed by rotation. The monitoring unit will make a secondary correction to the angle data of the bridge anchor structure in the design unit's drawings in combination with the bridge construction method, which is equivalent to remodeling the cumbersome steel anchor box structure, which will consume a lot of construction time and is prone to errors.

[0069] like Figure 8 As shown, the parametric modeling method of the above-mentioned three-dimensional spatial angle bridge tower steel anchor box provided by the present application comprises the following steps:

[0070] Step 1: Use catia software for parametric modeling, with the knowledge engineering module and EKL language script provided by the software

[0071] Step 2: Establish a knowledge engineering template for the steel anchor box unit; establish a UDF template for the steel anchor box unit, and input the parameters of the 24 groups of steel anchor boxes into the UDF template for the steel anchor box unit, including the following steps:

[0072] Step 2.1, establish the input conditions of the steel anchor box structure UDF template;

[0073] like Fig. 9 As shown, the anchor box reference point pt1, the anchor box guide line li1, the anchor box reference plane pm1, the first anchor box joint surface pm2 and the second anchor box joint surface pm3 are taken as five input conditions.

[0074] Step 2.2, set the steel anchor box unit control parameters;

[0075] like Fig.10 and Fig.11As shown in the figure, the parameters are set in combination with the structural characteristics and similarities of the steel anchor box. The control parameters of the steel anchor box unit include: the extension length L1 of the first force transmission plate N2 and the second force transmission plate N3, the length L2 of the cable guide tube N7, the length L3 of the cover plate reinforcement N6, the length L4 of the cover plate N5, the inner edge distance a between the first force transmission plate N2 and the second force transmission plate N3, the width b of the anchor plate N1, the width c of the cover plate reinforcement N6, the outer diameter φ1 of the cable guide tube N7, the opening diameter φ2 of the anchor plate N1, the plate thickness t1 of the anchor pad, the plate thickness t2 of the first force transmission plate N2 and the second force transmission plate N3, the plate thickness t3 of the third force transmission plate N4 and the cover plate reinforcement N6, the wall thickness t4 of the cable guide tube N7, the thickness t5 of the cover plate N5, and the thickness t6 of the reinforcement plate N8.

[0076] Step 2.3, create a steel anchor box family library;

[0077] The steel anchor box family library uses the anchor box reference point pt1 as the center point of the upper edge of the anchor pad N1; the anchor box guide line li1 is used as the guide line of the overall direction, so that the first force transfer plate N2, the second force transfer plate N3, the third force transfer plate N4, the cover plate reinforcement N6, and the cable guide tube N7 are parallel to the anchor box guide line li1, and the anchor pad N1 and the cover plate N5 are perpendicular to the anchor box guide line li1; the anchor box reference plane pm1 is used to constrain the rotation of the component along the anchor box guide line li1, the anchor pad N1, the first force transfer plate N2, the second force transfer plate N3, and the cover plate N5 are perpendicular to the anchor box reference plane pm1, and the third force transfer plate N4 and the cover plate reinforcement N6 are parallel to the anchor box reference plane pm1; the first anchor box joint surface pm2 and the second anchor box joint surface pm3 are used to constrain the boundary contours of the first force transfer plate N2, the second force transfer plate N3, and the cover plate N5;

[0078] The set steel anchor box unit control parameters are introduced into each part. The design table function is used to quickly enter data in the Excel spreadsheet data processing software and then quickly import it into the CATIA design table to realize real-time modification and change of the Excel software and CATIA parameters. Among them, the data entered into the table are first grouped into mid-span anchor boxes Mi (i=1~12) and side span anchor boxes Bj (j=1~12). Mi and Bj are group names and numbers of steel anchor box units. The parameters contained in each steel anchor box unit are entered in the form of a group. When switching, only the numbers of Mi and Bj are switched. Each data will be changed as a whole in the form of a group. At the same time, the solid model of the steel anchor box will also be rebuilt according to the switching of the group data to realize the establishment of the steel anchor box family library.

[0079] Step 2.4: Create a steel anchor box UDF template.

[0080] Use the user feature command to create a steel anchor box UDF template, and use the anchor box reference point pt1, anchor box guide line li1, anchor box reference plane pm1, first anchor box joint surface pm2 and second anchor box joint surface pm3 as input conditions to output parts N1 to N7 with parameters. Add parameter p1 and publish it as the number of anchor boxes that need to be generated when setting the user feature.

[0081] Step 3: Establish a knowledge engineering template for steel anchor box unit input conditions; establish a UDF template for steel anchor box unit input conditions, and input the parameters of 24 groups of steel anchor box input conditions into the UDF template for steel anchor box unit input conditions;

[0082] The input conditions of the steel anchor box are divided into five input conditions: anchor box reference point pt1, anchor box guide line li1, anchor box reference plane pm1, first anchor box joint surface pm2 and first anchor box joint surface pm3. Among them, the anchor box reference point pt1 is a fixed coordinate value, the first anchor box joint surface pm2 and the first anchor box joint surface pm3 are the inner wall plate surfaces of the steel bridge tower, which are fixed planes. The conditions that change with the parameters are the two input conditions of anchor box guide line li1 and anchor box reference plane pm1. The direction of the anchor box guide line li1 will change, and the input data is the angle value with the reference plane XOY plane, XOZ plane, and YOZ plane. The anchor box reference plane pm1 will change with the direction of the anchor box guide line li1. Therefore, the knowledge engineering template for establishing the input conditions of the steel anchor box unit is mainly for the two input conditions of anchor box guide line li1 and anchor box reference plane pm1.

[0083] Step 3.1: Fig.12 As shown, the input conditions of the UDF template for the input conditions of each steel anchor box unit are established, with the reference point pt2, direction line li2, reference plane XOY, reference plane XOZ, and reference plane YOZ as five input conditions; among them, the direction line li2 is parallel to the X-axis direction to distinguish the steel anchor box generation directions of the M direction and the B direction, the positive direction of the X-axis is the B direction, and the negative direction of the X-axis is the M direction;

[0084] Step 3.2, setting the control parameters of the anchor box guide line li1, using the angle θ between the anchor box guide line li1 and the XOY plane, the angle β between the anchor box guide line li1 and the XOZ plane, and using a single-value parameter p2 to distinguish the grouping of the angle values ​​between each group of steel anchor box guide lines li1 and the reference plane;

[0085] Step 3.3, establish a family library of input conditions for steel anchor box units; take reference point pt2 as the base point, establish reference planes XOY, XOZ and YOZ; take reference point pt2 as the base point and X-axis as the direction to establish direction line li2; take XOY plane as the base plane, the projection line of anchor box guide line li1 on XOY plane is li1', take reference point pt2 as the starting point to establish direction line li3 with an angle θ with projection line li1'; take XOZ plane as the base plane, the projection line of anchor box guide line li1 on XOZ plane is li1", take reference point pt2 as the starting point to establish direction line li4 with an angle β with projection line li1"; fit direction line li3 of XOY base plane and direction line li4 of XOZ base plane into anchor box guide line li1 in space, then check the angle γ between anchor box guide line li1 and YOZ plane, take anchor box guide line li1 as the outline and make anchor box reference plane pm1 with the direction perpendicular to XOY plane;

[0086] like Fig.13 As shown in the figure, the angle θ between the anchor box guide line li1 and the XOY plane, the angle β between the anchor box guide line li1 and the XOZ plane, and the single-valued parameter p2 are assigned to the part, then the single-valued parameter p2 = k1, k1 = 1~12, k1 represents the X of the anchor box on the M side M data sets, single-valued parameter p2=k2, k2=13~24, k2 represents the X of the anchor box on the B side M When switching, only the value of the single-value parameter p2 is switched. All data will be changed as a group. At the same time, the model of the steel anchor box unit input condition will be rebuilt according to the switching of the group data, so as to establish the family library of the steel anchor box unit input condition.

[0087] Step 3.4, use the user feature command to create a UDF template for the input conditions of the steel anchor box unit, where the reference point pt2, direction line li2, reference plane XOY, reference plane XOZ, and reference plane YOZ are used as five input conditions, and the anchor box guide line li1 and anchor box reference plane pm1 with parameters are output.

[0088] Step 4: Input the parameters of multiple sets of steel anchor box input conditions into the knowledge engineering template of steel anchor box unit input conditions to obtain the structural models of multiple sets of steel anchor boxes;

[0089] Step 4.1, the anchor box reference point pt1 is the coordinate value of the fixed point, which is adjusted according to the overall internal structure of the main tower design, and the coordinate value data of 24 points are entered, and the data is arranged in the order of anchor box numbers M1 to M12 and B1 to B12 to generate the anchor box reference point pt1 set 1;

[0090] Step 4.2: Fig.14As shown, a knowledge engineering array 1 script is written to loop call the UDF templates of multiple steel anchor box unit input conditions to realize batch generation of multiple groups of anchor box guide lines li1 and anchor box reference planes pm1; wherein, the for-while statement is used to realize the loop, and the number of loops is set to the parameter p2 that controls the number of steel anchor box unit input conditions; the CreateOrModifyTemplate function is used to realize the UDF template call of the steel anchor box unit input conditions; the five input conditions of the reinforcement UDF template, namely, the reference point pt2, the direction line li2, the reference plane XOY, the reference plane XOZ, and the reference plane YOZ, are input through the SetAttributeObject function; the parameter i of the UDF template of the steel anchor box unit input conditions is input through the SetAttributeInteger function, that is, the list composed of multiple parameters i is looped and called, and the number of calls is the number of loops p2, i=1~p2;

[0091] Arrange the 24 groups of anchor box guide lines li1 and anchor box reference planes pm1 generated in batches in the order of anchor box numbers M1 to M12 and B1 to B12, and put them into anchor box guide line li1 set 2 and anchor box reference plane pm1 set 3 respectively;

[0092] Step 4.3, extracting the inner wall surface of the bridge tower as the boundary conditions of the first anchor box joint surface pm2 and the second anchor box joint surface pm3;

[0093] Step 4.4: Fig.15 As shown, a knowledge engineering array 2 script is written to implement the loop call of multiple steel anchor box UDF templates to batch generate multiple groups of steel anchor box structures; wherein, a for-while statement is used to implement the loop, and the number of loops is set to the parameter p1 that controls the number of steel anchor boxes; the steel anchor box UDF template call is implemented through the CreateOrModifyTemplate function; the five input conditions of the reinforcement UDF template are input through the SetAttributeObject function, namely, the anchor box reference point pt1, the anchor box guide line li1, the anchor box reference plane pm1, the first anchor box joint surface pm2 and the second anchor box joint surface pm3, wherein the data of the anchor box reference point pt1, the anchor box guide line li1, and the anchor box reference plane pm1 are extracted in sequence from the anchor box reference point pt1 set 1, the anchor box guide line li1 set 2, and the anchor box reference plane pm1 set 3 respectively; the parameter i of the steel anchor box UDF template is input through the SetAttributeInteger function, that is, multiple set lists are looped and called, and the number of calls is the number of loops p1, i=1~p1;

[0094] Run the Knowledge Engineering Array 2 script to batch generate 24 sets of parameter-based steel anchor box structural models and achieve correct positioning of coordinates and directions.

[0095] Step 5: Make angle correction to the structural model of the steel anchor box.

[0096] Usually the data of the design drawings are used as the theoretical data for steel bridge tower modeling. However, during the construction of large-span cable-stayed bridges, there is usually a process of optimizing and adjusting the design line shape. Before construction, the monitoring unit is required to further optimize the bridge line shape in combination with the bridge construction method. The steel bridge tower is mainly the steel anchor box structure model angle correction.

[0097] When the angle of the structural model of the steel anchor box is corrected, the direction change of the anchor box guide line li1 is converted into the change of the angle value between the anchor box guide line li1 and the reference plane XOY plane, XOZ plane, and YOZ plane, and the angle θ between the anchor box guide line li1 and the XOY plane and the angle β between the anchor box guide line li1 and the XOZ plane are modified in the Excel table to realize the real-time modification of the Excel software and the CATIA parameters, and to correct the angle of the structural model of the steel anchor box.

[0098] The parametric modeling method of the steel anchor box of the bridge tower at a three-dimensional angle provided in the embodiment of the present application uses catia software and cooperates with the knowledge engineering module and the EKL language script for parametric modeling. When establishing the knowledge engineering template of the steel anchor box unit, multiple sets of steel anchor box parameters can be input into the knowledge engineering template, and the design table function can be combined with the Excel table to quickly enter and change data in real time. At the same time, when batch generating steel anchor box structures, the knowledge engineering array can be used to write scripts to realize the cyclic calling of multiple templates, avoiding the inefficiency of traditional two-dimensional drawing modeling and the cumbersomeness of existing three-dimensional modeling methods in processing complex structures, thereby efficiently processing a large number of similar steel anchor box structures with different parameters, and solving the problem of rapid modeling.

[0099] In addition, by setting detailed parameters for each component of the steel anchor box, the modeling accuracy can be effectively improved. For example, in the control parameter setting of the steel anchor box unit, the length, width, thickness of the force transmission plate, cable guide tube and other components, as well as the angular relationship between the components are accurately defined. By establishing multiple UDF templates, the input conditions such as the anchor box reference point, guide line, and reference plane are accurately set. This overcomes the problem that traditional two-dimensional drawings are difficult to fully and three-dimensionally display complex structures and are prone to errors. It can more accurately reflect the actual structure than the existing three-dimensional modeling method and solves the problem of accurate modeling.

[0100] In the process of steel anchor box structure model angle correction, the model can be modified in real time by simply modifying the angle between the anchor box guide line and the reference plane in the Excel table, which improves the flexibility of parameter modification. At the same time, the knowledge engineering template for the input conditions of the steel anchor box unit is established to effectively manage the key factor parameters that affect the model modification. Compared with the existing 3D modeling method, it solves the problem of rapid model modification and optimization.

[0101] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

Claims

1. A parametric modeling method for a three-dimensional angle bridge tower steel anchor box, characterized in that: It includes the following steps: Establish the knowledge engineering template of steel anchor box unit; Establish a knowledge engineering template for input conditions of steel anchor box units; Inputting the parameters of multiple sets of steel anchor box input conditions into the knowledge engineering template of the steel anchor box unit input conditions to obtain the structural models of the multiple sets of steel anchor boxes; Angle correction is performed on the structural model of the steel anchor box.

2. The parametric modeling method of the three-dimensional angle bridge tower steel anchor box according to claim 1 is characterized in that: The knowledge engineering template for establishing the bridge tower steel anchor box unit includes the following steps: Establish the input conditions of the UDF template for the steel anchor box structure; Set the steel anchor box unit control parameters; Establish a steel anchor box family library; Create a steel anchor box UDF template.

3. The parametric modeling method of the three-dimensional spatial angle bridge tower steel anchor box according to claim 2 is characterized in that: When establishing the input conditions of the steel anchor box structure UDF template, the anchor box reference point pt1, the anchor box guide line li1, the anchor box reference plane pm1, the first anchor box joint surface pm2 and the second anchor box joint surface pm3 are used as input conditions.

4. The parametric modeling method of the three-dimensional spatial angle bridge tower steel anchor box according to claim 2 is characterized in that: The control parameters of the steel anchor box unit include: the extension length L1 of the first force transmission plate N2 and the second force transmission plate N3, the length L2 of the cable duct N7, the length L3 of the cover plate reinforcement N6, the length L4 of the cover plate N5, the inner edge distance a between the first force transmission plate N2 and the second force transmission plate N3, the width b of the anchor plate N1, the width c of the cover plate reinforcement N6, the outer diameter φ1 of the cable duct N7, the opening diameter φ2 of the anchor plate N1, the plate thickness t1 of the anchor pad, the plate thickness t2 of the first force transmission plate N2 and the second force transmission plate N3, the plate thickness t3 of the third force transmission plate N4 and the cover plate reinforcement N6, the wall thickness t4 of the cable duct N7, the thickness t5 of the cover plate N5, and the thickness t6 of the reinforcement plate N8.

5. The parametric modeling method of the three-dimensional spatial angle bridge tower steel anchor box according to claim 2 is characterized in that: Creating a steel anchor box family library includes the following steps: The anchor box reference point pt1 is taken as the center point of the upper edge of the anchor pad N1; Use the anchor box guide line li1 as the overall direction guide line, make the first force transmission plate N2, the second force transmission plate N3, the third force transmission plate N4, the cover plate reinforcement N6, and the cable guide tube N7 parallel to the anchor box guide line li1, and make the anchor pad N1 and the cover plate N5 perpendicular to the anchor box guide line li1; The anchor box reference plane pm1 is used to constrain the rotation of the component along the anchor box guide line li1. The anchor pad N1, the first force transmission plate N2, the second force transmission plate N3, and the cover plate N5 are perpendicular to the anchor box reference plane pm1, and the third force transmission plate N4 and the cover plate reinforcement N6 are parallel to the anchor box reference plane pm1. Use the first anchor box joint surface pm2 and the second anchor box joint surface pm3 to constrain the boundary contours of the first force transmission plate N2, the second force transmission plate N3, and the cover plate N5; Introduce the set steel anchor box unit control parameters into each part to establish a steel anchor box family library.

6. The parametric modeling method of the three-dimensional angle bridge tower steel anchor box according to claim 2 is characterized in that: When establishing the steel anchor box UDF template, the anchor box reference point pt1, anchor box guide line li1, anchor box reference plane pm1, first anchor box joint surface pm2 and second anchor box joint surface pm3 are used as input conditions to output parts with parameters, and parameter p1 is added and published as the number of anchor boxes that need to be generated during user feature setting.

7. The parametric modeling method of the three-dimensional angle bridge tower steel anchor box according to claim 1 is characterized in that: The knowledge engineering template for establishing the input conditions of the steel anchor box element includes the following steps: The input conditions of the steel anchor box unit input condition UDF template are established, with the reference point pt2, direction line li2, reference plane XOY, reference plane XOZ, and reference plane YOZ as five input conditions; among them, the direction line li2 is parallel to the X-axis direction to distinguish the steel anchor box generation direction of the M direction and the B direction, the positive direction of the X-axis is the B direction, and the negative direction of the X-axis is the M direction; Set the control parameters of the anchor box guide line li1, using the angle θ between the anchor box guide line li1 and the XOY plane, the angle β between the anchor box guide line li1 and the XOZ plane, and the single-value parameter p2 to distinguish the grouping of the angle values ​​between each group of steel anchor box guide lines li1 and the reference plane; Establish a family library of input conditions for steel anchor box units; establish the reference plane XOY plane, reference plane XOZ plane, and reference plane YOZ plane with reference point pt2 as the base point; establish direction line li2 with reference point pt2 as the base point and X-axis as the direction; take XOY plane as the base plane, the projection line of anchor box guide line li1 on XOY plane is li1', and establish direction line li3 with angle θ with projection line li1' with reference point pt2 as the starting point; take XOZ plane as the base plane, the projection line of anchor box guide line li1 on XOZ plane is li1", and establish direction line li4 with angle β with projection line li1" with reference point pt2 as the starting point; fit the direction line li3 of XOY base plane and the direction line li4 of XOZ base plane into anchor box guide line li1 in space, and then check the angle γ between anchor box guide line li1 and YOZ plane, and make anchor box reference plane pm1 with anchor box guide line li1 as the outline and perpendicular to XOY plane as the direction; The angle θ between the anchor box guide line li1 and the XOY plane, the angle β between the anchor box guide line li1 and the XOZ plane, and the single-valued parameter p2 are assigned to the part, then the single-valued parameter p2 = k1, k1 = 1~X M , k1 represents the X of the M side anchor box M data sets, single-valued parameters p2 = k2, k2 = X M +1~2X M , k2 represents the X of the anchor box on the B side M A data group is used to establish a family library of input conditions for steel anchor box units; Use the user feature command to create a UDF template for the input conditions of the steel anchor box unit, and use the reference point pt2, direction line li2, reference plane XOY, reference plane XOZ, and reference plane YOZ as input conditions to output the anchor box guide line li1 and anchor box reference plane pm1 with parameters.

8. The parametric modeling method of the three-dimensional angle bridge tower steel anchor box according to claim 6 is characterized in that: Inputting the parameters of multiple sets of steel anchor box input conditions into the knowledge engineering template of the steel anchor box unit input conditions to obtain the structural models of multiple sets of steel anchor boxes includes the following steps: According to the overall internal structure of the bridge tower design, multiple point coordinate value data are input and arranged in the order of anchor box numbers to generate anchor box reference point pt1 set 1; Write a knowledge engineering array 1 script to loop call the UDF templates of multiple steel anchor box unit input conditions, and realize the batch generation of multiple groups of anchor box guide lines li1 and anchor box reference planes pm1; wherein, the for-while statement is used to realize the loop, and the number of loops is set to the parameter p2 that controls the number of steel anchor box unit input conditions; the CreateOrModifyTemplate function is used to realize the UDF template call of the steel anchor box unit input conditions; the five input conditions of the reinforcement UDF template, namely, the reference point pt2, the direction line li2, the reference plane XOY, the reference plane XOZ, and the reference plane YOZ, are input through the SetAttributeObject function; the parameter i of the UDF template of the steel anchor box unit input conditions is input through the SetAttributeInteger function, that is, the list composed of multiple parameters i is looped and called, and the number of calls is the number of loops p2, i=1~p2; Arrange the data of multiple groups of batch-generated anchor box guide lines li1 and anchor box reference planes pm1 according to the order of anchor box numbers, and put them into anchor box guide line li1 set 2 and anchor box reference plane pm1 set 3 respectively; Extract the inner wall surface of the bridge tower as the boundary conditions of the first anchor box joint surface pm2 and the second anchor box joint surface pm3; Write a knowledge engineering array 2 script to implement the loop call of multiple steel anchor box UDF templates to batch generate multiple groups of steel anchor box structures; wherein, the for-while statement is used to implement the loop, and the number of loops is set to the parameter p1 that controls the number of steel anchor boxes; the steel anchor box UDF template call is implemented through the CreateOrModifyTemplate function; the five input conditions of the reinforcement UDF template are input through the SetAttributeObject function, namely, the anchor box reference point pt1, the anchor box guide line li1, the anchor box reference plane pm1, the first anchor box joint surface pm2 and the second anchor box joint surface pm3, wherein the data of the anchor box reference point pt1, the anchor box guide line li1, and the anchor box reference plane pm1 are extracted in sequence from the anchor box reference point pt1 set 1, the anchor box guide line li1 set 2, and the anchor box reference plane pm1 set 3; the parameter i of the steel anchor box UDF template is input through the SetAttributeInteger function, that is, multiple set lists are looped and called, and the number of calls is the number of loops p1, i=1~p1; Run the Knowledge Engineering Array2 script to batch generate multiple sets of parameter-based steel anchor box structural models.

9. The parametric modeling method of the three-dimensional angle bridge tower steel anchor box according to claim 1 is characterized in that: When the angle of the structural model of the steel anchor box is corrected, the direction change of the anchor box guide line li1 is converted into the change of the angle value between the anchor box guide line li1 and the reference plane XOY plane, XOZ plane, and YOZ plane, and the angle of the structural model of the steel anchor box is corrected by modifying the angle θ between the anchor box guide line li1 and the XOY plane and the angle β between the anchor box guide line li1 and the XOZ plane.

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