Method and system for batch generating sections based on CATIA

Abstract

The application discloses a kind of based on CATIA batch generation section method and system, it is related to vehicle parts design technical field, comprising: when receiving generation section instruction, display generation section window, generation section window includes section name selection box, car model name selection box, component object selection box, continuous curve selection box, starting point selection box and section position interval input box;In response to the operation of user acting on section name selection box, car model name selection box and component object selection box, determine section name, car model name and component object;In response to the operation of user acting on continuous curve selection box, starting point selection box and section position interval input box, determine section position;Based on section position, section name, car model name and component object generates multiple section parts and is hung to the structure tree of component object.The present application can automatically create section parts in batches, reduce the difficulty of intercepting section, improve the efficiency of intercepting section.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle part design, and in particular relates to a method and system for batch generation of sections based on CATIA. BACKGROUND

[0002] With the increasing development of computer-aided design, manufacturing industry basically relies on three-dimensional design in product development process to carry out product pre-development. In the development process of a passenger car body-in-white, part detail structure design often needs to compare competitive product structure and pre-development project structure to select an optimal section for corresponding design. Therefore, it is crucial to complete section generation in the pre-development stage.

[0003] At present, part section generation mainly relies on the section command of CATIA and manual calculation of various parameters of the section. This method has the following disadvantages:

[0004] 1. Complex operation: the section command of CATIA is relatively complex to operate in some cases. For example, when creating a section view, the user needs to select the correct section position and direction, and the selection of the correct working plane for section operation can become complex.

[0005] 2. Various parameters of the section are manually calculated one by one, which is low in efficiency. SUMMARY

[0006] The embodiments of the present application provide a method and system for batch generation of sections based on CATIA to solve the technical problem of the prior art that the existing part section mainly relies on the section command of CATIA for section generation, which is relatively complex to operate and low in section generation efficiency.

[0007] In a first aspect, a method for batch generation of sections based on CATIA is provided, including the following steps:

[0008] Upon receiving a section generation instruction, a section generation window is displayed, the section generation window including a section name selection box, a vehicle model name selection box, a part object selection box, a continuous curve selection box, a starting point selection box, and a section position interval input box;

[0009] In response to user operations on the section name selection box, the vehicle model name selection box, and the part object selection box, the section name, the vehicle model name, and the part object are determined;

[0010] In response to user operations on the continuous curve selection box, the starting point selection box, and the section position interval input box, the section position is determined;

[0011] generate a plurality of section parts based on the section location, the section name, the vehicle model name and the component object and link the section parts to the structure tree of the component object.

[0012] In some embodiments, after the step of generating a plurality of section parts based on the section location, the section name, the vehicle model name and the component object and linking the section parts to the structure tree of the component object, the method further comprises:

[0013] in response to a section parameter calculation instruction of a user acting on any section part, displaying a section parameter calculation window, the section parameter calculation window comprising an input type selection box, a section contour selection box, a center coordinate system selection box and a target position selection box;

[0014] in response to an operation of a user acting on the input type selection box, the section contour selection box, the center coordinate system selection box and the target position selection box, calculating the section parameter of the section part and linking the calculated section parameter to the structure tree of the section part.

[0015] In some embodiments, after the step of in response to an operation of a user acting on the input type selection box, the section contour selection box, the center coordinate system selection box and the target position selection box, calculating the section parameter of the section part and linking the calculated section parameter to the structure tree of the section part, the method further comprises:

[0016] in response to a comparison instruction of a user acting on the plurality of section parts, displaying a comparison window, the comparison window comprising a section name selection box;

[0017] in response to an operation of a user acting on the section name selection box, obtaining the section parameters of all section parts with the same section name and different vehicle model names and generating a comparison list.

[0018] In some embodiments, the section parameters comprise performance parameters and geometric parameters, the performance parameters comprising enclosed area, thickness area, moment of inertia and torsional constant, and the geometric parameters comprising U-direction maximum length and V-direction maximum length.

[0019] In some embodiments, before the step of in response to a section parameter calculation instruction of a user acting on any section part, displaying a section parameter calculation window, the section parameter calculation window comprising an input type selection box, a section contour selection box, a center coordinate system selection box and a target position selection box, the method further comprises:

[0020] detecting whether any section part is a closed part;

[0021] if not, creating a sketch closed contour of the section part.

[0022] In some embodiments, the step of if not, creating a sketch closed contour of the section part, comprises:

[0023] in response to a user's operation on the closed sketch instruction of the section part, displaying the closed sketch window, the closed sketch window comprising a plurality of sketch element selection boxes;

[0024] in response to a user's operation on the plurality of sketch element selection boxes, determining a plurality of sketch elements;

[0025] creating a closed sketch contour of the section part based on the plurality of sketch elements.

[0026] In a second aspect, a system for batch generating sections based on CATIA is provided, comprising:

[0027] a section generation window display module, configured to display the section generation window upon receiving a section generation instruction, the section generation window comprising a section name selection box, a vehicle model name selection box, a part object selection box, a continuous curve selection box, a starting point selection box, and a section position interval input box;

[0028] a section name response module, configured to determine a section name, a vehicle model name, and a part object in response to a user's operation on the section name selection box, the vehicle model name selection box, and the part object selection box;

[0029] a section position response module, configured to determine a section position in response to a user's operation on the continuous curve selection box, the starting point selection box, and the section position interval input box;

[0030] a section part generation module, configured to generate a plurality of section parts based on the section position, the section name, the vehicle model name, and the part object and to attach the plurality of section parts to a structure tree of the part object.

[0031] In some embodiments, the system for batch generating sections based on CATIA further comprises:

[0032] a section parameter calculation window display module, configured to display the section parameter calculation window in response to a user's section parameter calculation instruction of any section part, the section parameter calculation window comprising an input type selection box, a section contour selection box, a center coordinate system selection box, and a target position selection box;

[0033] a section parameter calculation response module, configured to calculate a section parameter of the section part in response to a user's operation on the input type selection box, the section contour selection box, the center coordinate system selection box, and the target position selection box, and to attach the calculated section parameter to a structure tree of the section part.

[0034] In some embodiments, the system for batch generating sections based on CATIA further comprises:

[0035] A comparison window display module is configured to display the comparison window when receiving a comparison instruction for multiple section parts, the comparison window comprising a section name selection box;

[0036] A comparison list generation module is configured to obtain section parameters of all section parts with the same section name and different vehicle model names and generate a comparison list in response to an operation of the section name selection box by a user.

[0037] The technical solution provided by the present application has the following beneficial effects:

[0038] The embodiment of the present application provides a method and system for batch generating sections based on CATIA, which can automatically create section parts in batches according to a part object and a section position selected by a designer, and thus reduces the difficulty of section interception and improves the efficiency of section interception compared with the traditional mode in which a designer intercepts a section by using a section command provided by CATIA. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0040] Figure 1 A flowchart of a method for batch generating sections based on CATIA is provided for the embodiment of the present application.

[0041] Figure 2 A schematic diagram of a section window is provided for the embodiment of the present application.

[0042] Figure 3 A schematic diagram of a section part is provided for the embodiment of the present application.

[0043] Figure 4 Another schematic diagram of a section part is provided for the embodiment of the present application.

[0044] Figure 5 Another flowchart of a method for batch generating sections based on CATIA is provided for the embodiment of the present application.

[0045] Figure 6 A schematic diagram of a section parameter calculation window is provided for the embodiment of the present application.

[0046] Figure 7 A schematic diagram of creating a section parameter under a structure tree of a section part is provided for the embodiment of the present application.

[0047] Figure 8 Another flow chart of a method for batch generating sections based on CATIA provided by an embodiment of the present application;

[0048] Figure 9 A comparison window schematic diagram provided by an embodiment of the present application;

[0049] Figure 10 A schematic diagram of generating a comparison list provided by an embodiment of the present application;

[0050] Figure 11 A schematic diagram of a closed sketch window provided by an embodiment of the present application;

[0051] Figure 12 A schematic diagram of a closed contour of a sketch based on Figure 11 provided by an embodiment of the present application;

[0052] Figure 13 Another schematic diagram of a closed sketch window provided by an embodiment of the present application;

[0053] Figure 14 A schematic diagram of a closed contour of a sketch based on Figure 13 provided by an embodiment of the present application;

[0054] Figure 15 A structural diagram of a system for batch generating sections based on CATIA provided by an embodiment of the present application;

[0055] Figure 16 Another structural diagram of a system for batch generating sections based on CATIA provided by an embodiment of the present application;

[0056] Figure 17 Another structural diagram of a system for batch generating sections based on CATIA provided by an embodiment of the present application. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to 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 of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0058] The embodiments of the present application provide a method for batch generating sections based on CATIA, which can solve the technical problem that the existing part section mainly relies on the section command of CATIA to generate sections, the operation is relatively complex, and the section generation efficiency is not high.

[0059] Referring to Figure 1 As shown in the figure, the embodiment of the present application provides a method for batch generating sections based on CATIA, comprising the following steps:

[0060] Step S10, when receiving the instruction for generating sections, display the section generating window, wherein the section generating window comprises a section name selection box, a vehicle model name selection box, a component object selection box, a continuous curve selection box, a starting point selection box and a section position interval input box.

[0061] Referring to Figure 2 As shown in the figure, when receiving the instruction for generating sections, display Figure 2 As shown in the figure, the section generating window comprises a section name selection box, a vehicle model name selection box, a component object selection box, a continuous curve selection box, a starting point selection box and a section position interval input box. Figure 2 As shown in the figure, the section generating window comprises a section name selection box, a vehicle model name selection box, a component object selection box, a continuous curve selection box, a starting point selection box and a section position interval input box.

[0062] Step S20, in response to the operation of the user on the section name selection box, the vehicle model name selection box and the component object selection box, determine the section name, the vehicle model name and the component object.

[0063] Step S30, in response to the operation of the user on the continuous curve selection box, the starting point selection box and the section position interval input box, determine the section position. Wherein the continuous curve is a relatively typical curve on the component object. Taking the component object as a beam part, the continuous curve can be a side line in the length direction of the beam.

[0064] Step S40, based on the section position, the section name, the vehicle model name and the component object, generate a plurality of section parts and hang them on the structure tree of the component object.

[0065] Referring to Figure 3 and Figure 4 As shown in the figure, the section part is named as Section_section name_ vehicle model name_time.CATPart.

[0066] The method for batch generating sections based on CATIA in the embodiment of the present application can automatically create section parts in batches according to the component object and the section position selected by the designer, and compared with the traditional mode in which the designer intercepts sections by relying on the section command of CATIA, the method reduces the difficulty of intercepting sections and improves the efficiency of intercepting sections.

[0067] As an optional implementation, in one embodiment of the present application, referring to Figure 5 As shown in the figure, after the step of generating a plurality of section parts based on the section position, the section name, the vehicle model name and the component object and hanging them on the structure tree of the component object, the method further comprises:

[0068] Step S50: In response to the user's instruction to calculate the cross-sectional parameters of any cross-sectional part, the cross-sectional parameter calculation window is displayed. The cross-sectional parameter calculation window includes an input type selection box, a cross-sectional profile selection box, a centroid coordinate system selection box, and a target position selection box.

[0069] See Figure 6 As shown, select Closed Profile Type A in the Input Type selection box; select two profile elements (sketch line profile or filled profile) in the Section Profile selection box; select the axis system in the Centroid Coordinate System selection box; select Section Part Position in the Target Position selection box (by default, the section parameters are created under the section part's structure tree).

[0070] Step S60: In response to the user's operation on the input type selection box, cross-sectional profile selection box, centroid coordinate system selection box and target position selection box, calculate the cross-sectional parameters of the cross-sectional part and attach the calculated cross-sectional parameters to the structure tree of the cross-sectional part.

[0071] The cross-sectional parameters include performance parameters and geometric parameters. The performance parameters include the enclosing area, material thickness area, moment of inertia, and torsional constant. The geometric parameters include the maximum length in the U-direction and the maximum length in the V-direction. See also... Figure 7 As shown, in Figure 6 After clicking "Confirm" at the midpoint, section parameters will be created under the structure tree of the section part.

[0072] The embodiments of the present invention can quickly calculate the performance parameters and geometric parameters of cross-sectional parts without requiring engineers to manually calculate them one by one, thus improving the design efficiency of designers.

[0073] As an alternative implementation, in one embodiment of the invention, see [link to relevant documentation]. Figure 8 As shown, after the steps of responding to user operations on the input type selection box, cross-sectional profile selection box, centroid coordinate system selection box, and target position selection box, calculating the cross-sectional parameters of the cross-sectional part, and attaching the calculated cross-sectional parameters to the structure tree of the cross-sectional part, the method further includes:

[0074] Step S70: When a comparison instruction for multiple cross-section parts is received, the comparison window is displayed, and the comparison window includes a cross-section name selection box.

[0075] See Figure 9 As shown, when a comparison instruction for multiple cross-section parts is received, the comparison window is displayed, and the comparison window includes a cross-section name selection box.

[0076] Step S80: In response to the user's operation on the section name selection box, obtain the section parameters of all section parts with the same section name but different vehicle models, and generate a comparison list.

[0077] Referring to Figure 10 As shown, based on the section name BO01, different vehicle model names are AX1 and AX2, and a comparison list as shown in Figure 10 can be generated.

[0078] The embodiment of the present application can use the section name as a reference to quickly generate a section parameter comparison report of the same section name of different vehicle models, and the comparison report provides a reference for the designer and improves the design efficiency of the designer.

[0079] As an optional implementation, in one embodiment of the present application, before the step of displaying the section parameter calculation window including the input type selection box, the section contour selection box, the center coordinate system selection box and the target position selection box in response to the user's section parameter calculation instruction on any section part, the step includes:

[0080] Detecting whether the any section part is a closed part;

[0081] If not, creating a sketch closed contour of the section part.

[0082] Specifically, the step of creating a sketch closed contour of the section part if not includes:

[0083] In response to the user's closed sketch instruction on the section part, displaying the closed sketch window, the closed sketch window including a plurality of sketch element selection boxes;

[0084] In response to the user's operation on a plurality of the sketch element selection boxes, determining a plurality of sketch elements;

[0085] Based on the plurality of sketch elements, creating a sketch closed contour of the section part.

[0086] Referring to Figure 11 and Figure 12 As shown, when the sketch element selection box selects a straight line-straight line form, Figure 11 the sketch closed contour of the non-closed part after operation is as shown in Figure 12 .

[0087] Referring to Figure 13 and Figure 14 As shown, when the sketch element selection box selects a straight line-point form, Figure 13 the sketch closed contour of the non-closed part after operation is as shown in Figure 14 .

[0088] Referring to Figure 15As shown, the embodiment of the present application provides a system for batch generating cross sections based on CATIA, comprising: a cross section window display module, a cross section position response module, a cross section name response module and a cross section part generation module.

[0089] The cross section window display module is configured to display the cross section window upon receiving a cross section generation instruction, the cross section window comprising a cross section name selection box, a vehicle model name selection box, a component object selection box, a continuous curve selection box, a starting point selection box and a cross section position interval input box.

[0090] The cross section name response module is configured to determine a cross section name, a vehicle model name and a component object in response to user operations on the cross section name selection box, the vehicle model name selection box and the component object selection box.

[0091] The cross section position response module is configured to determine a cross section position in response to user operations on the continuous curve selection box, the starting point selection box and the cross section position interval input box.

[0092] The cross section part generation module is configured to generate a plurality of cross section parts based on the cross section position, the cross section name, the vehicle model name and the component object and attach the cross section parts to a structure tree of the component object.

[0093] The system for batch generating cross sections based on CATIA in the embodiment of the present application can automatically create cross section parts in batches according to a component object and a cross section position selected by a designer, thereby reducing the difficulty of cross section interception and improving the efficiency of cross section interception compared with a traditional mode in which a designer intercepts a cross section by relying on a cross section command of CATIA.

[0094] As an optional implementation, in one embodiment of the present application, referring to Figure 16 As shown, the system for batch generating cross sections based on CATIA further comprises a cross section parameter calculation window display module and a cross section parameter calculation response module.

[0095] The cross section parameter calculation window display module is configured to display the cross section parameter calculation window in response to a cross section parameter calculation instruction of any cross section part, the cross section parameter calculation window comprising an input type selection box, a cross section contour selection box, a center coordinate system selection box and a target position selection box.

[0096] Referring to Figure 6 As shown, a closed contour type TypeA is selected in the input type selection box; 2 cross section contour elements (a sketch line contour or a filled contour) are selected in the cross section contour selection box; an axis system is selected in the center coordinate system selection box; and a cross section part position is selected in the target position selection box (a cross section parameter is created under a structure tree of the cross section part by default).

[0097] The section parameter calculation response module is configured to calculate the section parameters of the section part in response to the user's operation on the input type selection box, the section contour selection box, the core coordinate system selection box and the target position selection box, and to link the calculated section parameters to the structure tree of the section part.

[0098] The section parameters include performance parameters and geometric parameters, the performance parameters include enclosed area, thickness area, moment of inertia and torsional constant, and the geometric parameters include U-direction maximum length and V-direction maximum length. Figure 7 As shown in the figure, after the "Confirm" under the midpoint, the section parameters are created under the structure tree of the section part. Figure 6

[0099] The embodiment of the application can quickly calculate the performance parameters and geometric parameters of the section part, without manual calculation by engineers, thereby improving the design efficiency of the designers.

[0100] As an optional implementation, in one embodiment of the application, as shown in the figure, the system for generating sections in batches based on CATIA further comprises a comparison window display module and a comparison list generation module. Figure 17

[0101] The comparison window display module is configured to display the comparison window including a section name selection box when receiving a comparison instruction for the plurality of section parts.

[0102] As shown in the figure, when receiving the comparison instruction for the plurality of section parts, the comparison window including the section name selection box is displayed. Figure 9

[0103] The comparison list generation module is configured to obtain the section parameters of all section parts with the same section name and different vehicle model names in response to the user's operation on the section name selection box, and to generate a comparison list.

[0104] As shown in the figure, based on the section name BO01 and different vehicle model names AX1 and AX2, the comparison list as shown in the figure can be generated. Figure 10 Figure 10

[0105] The embodiment of the application can use the section name as a reference to quickly generate a section parameter comparison report of the section parts with the same section name but different vehicle models, and the comparison report provides a reference for the designers, thereby improving the design efficiency of the designers.

[0106] ​​​​​In the description of the present application, it should be noted that the terms "upper", "lower", and the like are used for indicating the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0107] It should be noted that in the present application, relational terms such as "first" and "second", and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or other elements inherent in such a process, method, article or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article or apparatus including the element.

[0108] The above is only a specific embodiment of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features of the present application.

Claims

1. A method for batch generating sections based on CATIA, characterized in that, The method comprises the following steps: Upon receiving a section generation instruction, a section generation window is displayed, the section generation window comprising a section name selection box, a vehicle model name selection box, a component object selection box, a continuous curve selection box, a starting point selection box, and a section position interval input box; In response to user operations on the section name selection box, the vehicle model name selection box, and the component object selection box, the section name, the vehicle model name, and the component object are determined; In response to user operations on the continuous curve selection box, the starting point selection box, and the section position interval input box, the section position is determined; Based on the section position, the section name, the vehicle model name, and the component object, a plurality of section parts are generated and attached to the structure tree of the component object; After the step of generating the plurality of section parts based on the section position, the section name, the vehicle model name, and the component object and attaching the plurality of section parts to the structure tree of the component object, the method further comprises: In response to a section parameter calculation instruction of any section part, a section parameter calculation window is displayed, the section parameter calculation window comprising an input type selection box, a section contour selection box, a center coordinate system selection box, and a target position selection box; wherein the input type selection box comprises a closed contour type Type A; the section contour selection box comprises a sketch line contour and a filled contour; the center coordinate system selection box comprises an axis system; and the target position selection box comprises a section part position; In response to user operations on the input type selection box, the section contour selection box, the center coordinate system selection box, and the target position selection box, the section parameters of the section part are calculated, and the calculated section parameters are attached to the structure tree of the section part; the section parameters comprise performance parameters and geometric parameters, the performance parameters comprise an enclosed area, a thickness area, a moment of inertia, and a torsional constant, and the geometric parameters comprise a maximum length in a U direction and a maximum length in a V direction; After the step of calculating the section parameters of the section part in response to user operations on the input type selection box, the section contour selection box, the center coordinate system selection box, and the target position selection box and attaching the calculated section parameters to the structure tree of the section part, the method further comprises: Upon receiving a comparison instruction for the plurality of section parts, a comparison window is displayed, the comparison window comprising a section name selection box; In response to user operations on the section name selection box, the section parameters of all section parts having the same section name and different vehicle model names are obtained, and a comparison list is generated.

2. The method for batch generating sections based on CATIA according to claim 1, wherein, Before the step of displaying the section parameter calculation window in response to a section parameter calculation instruction of any section part, the section parameter calculation window comprising an input type selection box, a section contour selection box, a center coordinate system selection box, and a target position selection box, the method comprises: Detecting whether any section part is a closed part; If not, a sketch closed contour of the section part is created.

3. The method for batch generating sections based on CATIA according to claim 2, characterized in that, The step of creating the sketch closed contour of the section part if the section part is not a closed part comprises: In response to a closed sketch instruction of the section part, a closed sketch window is displayed, the closed sketch window comprising a plurality of sketch element selection boxes; In response to a user's operation on the plurality of sketch element selection boxes, a plurality of sketch elements are determined; Based on the plurality of sketch elements, a sketch closed contour of the section part is created.

4. A system for batch generation of sections based on CATIA, characterized in that, Comprise: A section window display module for displaying a section window upon receiving a section generation instruction, the section window comprising a section name selection box, a vehicle model name selection box, a part object selection box, a continuous curve selection box, a starting point selection box, and a section position interval input box; A section name response module for determining a section name, a vehicle model name, and a part object in response to a user's operation on the section name selection box, the vehicle model name selection box, and the part object selection box; A section position response module for determining a section position in response to a user's operation on the continuous curve selection box, the starting point selection box, and the section position interval input box; A section part generation module for generating a plurality of section parts based on the section position, the section name, the vehicle model name, and the part object and attaching the section parts to a structure tree of the part object; A section parameter calculation window display module for displaying a section parameter calculation window in response to a user's section parameter calculation instruction on any section part, the section parameter calculation window comprising an input type selection box, a section contour selection box, a center coordinate system selection box, and a target position selection box; wherein the input type selection box comprises a closed contour type Type A; the section contour selection box comprises a sketch line contour and a filled contour; the center coordinate system selection box comprises an axis system; and the target position selection box comprises a section part position; A section parameter calculation response module for calculating a section parameter of the section part in response to a user's operation on the input type selection box, the section contour selection box, the center coordinate system selection box, and the target position selection box and attaching the calculated section parameter to the structure tree of the section part; wherein the section parameter comprises a performance parameter and a geometric parameter, the performance parameter comprises an enclosed area, a thickness area, a moment of inertia, and a torsion constant, and the geometric parameter comprises a U-direction maximum length and a V-direction maximum length; A comparison window display module for displaying a comparison window upon receiving a comparison instruction for a plurality of section parts, the comparison window comprising a section name selection box; A comparison list generation module for obtaining section parameters of all section parts with the same section name and different vehicle model names and generating a comparison list in response to a user's operation on the section name selection box.

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