CN112926249A - Method and system for screening stress influence factors of sliding block on telescopic arm support - Google Patents
Method and system for screening stress influence factors of sliding block on telescopic arm support Download PDFInfo
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Abstract
The embodiment of the application provides a method and a system for screening stress influence factors of a sliding block on a telescopic arm support. The method comprises the following steps: acquiring a pre-established telescopic boom model, wherein the telescopic boom model comprises an assembly model which is established according to preset size parameters and comprises a main boom, a front lower sliding block and a rear upper sliding block of a telescopic boom; setting the materials of a main arm, a telescopic arm, a front lower sliding block and a rear upper sliding block, the contact area of the front lower sliding block and the telescopic arm, the contact area of the rear upper sliding block and the main arm and chamfering parameters of the front lower sliding block and the rear upper sliding block; carrying out meshing on the main arm and the telescopic arm by adopting shell units, carrying out meshing on the front lower sliding block and the rear upper sliding block by adopting entity units, and calculating to obtain a stress cloud chart value; obtaining a plurality of groups of data of the slider material influencing the stress of the main arm by adopting a controlled variable method; and screening out main influence parameters on the stress of the telescopic arm support according to the multiple groups of data.
Description
Technical Field
The application relates to the technical field of finite element stress analysis, in particular to a method and a system for screening stress influence factors of a sliding block on a telescopic arm support.
Background
The design and calculation method of the telescopic arm support on the engineering machinery vehicle is based on crane design specifications, but only has an empirical reference value of the lap joint quantity of two adjacent sections of arms, no relevant design method is provided for the parameter design of the sliding block, the sliding block is a main factor influencing the stress value at the lap joint, the high stress concentration area can be effectively avoided by optimizing the parameters of the sliding block, and the optimization design of the arm support structure has an important role. However, no feasible technical scheme exists for screening the main factors influencing the stress.
In view of the above problems, no effective technical solution exists at present.
Disclosure of Invention
The embodiment of the application aims to provide a method and a system for screening stress influence factors of a sliding block on a telescopic arm support, and the method and the system can be high in efficiency and accuracy.
The embodiment of the application also provides a method for screening the stress influence factors of the sliding block on the telescopic arm support, which comprises the following steps:
acquiring a pre-established telescopic boom model, wherein the telescopic boom model comprises an assembly model which is established according to preset size parameters and comprises a main boom, a front lower sliding block and a rear upper sliding block of a telescopic boom;
setting the materials of a main arm, a telescopic arm, a front lower sliding block and a rear upper sliding block, the contact area of the front lower sliding block and the telescopic arm, the contact area of the rear upper sliding block and the main arm and chamfering parameters of the front lower sliding block and the rear upper sliding block;
applying load, constraint conditions and contact boundary conditions to the telescopic boom model, performing meshing on the main boom and the telescopic boom by adopting shell units, performing meshing on the front lower sliding block and the rear upper sliding block by adopting entity units, and calculating to obtain a stress cloud chart value;
respectively changing one parameter of the shape, the contact area, the material and the chamfer angle of the front lower sliding block and the rear lower sliding block by adopting a variable control method to obtain a plurality of groups of data of the slider material influencing the stress of the main arm;
and screening out main influence parameters on the stress of the telescopic arm support according to the multiple groups of data.
Optionally, in the method for screening stress influence factors of a slider on a telescopic boom according to the embodiment of the present application, the step of respectively changing one parameter of a slider shape, a contact area, a material and a chamfer size of the front lower slider and the rear lower slider by using a controlled variable method to obtain multiple sets of data of slider materials influencing the stress of the main arm includes:
keeping the block shapes and the contact areas of the front lower sliding block and the rear lower sliding block unchanged, and changing the materials of the front lower sliding block and the rear lower sliding block to obtain first data of a group of sliding block materials influencing the stress of the main arm;
keeping the shapes and materials of the front lower sliding block and the rear lower sliding block unchanged, and changing the contact areas of the front lower sliding block and the rear lower sliding block to obtain second data of the influence of the contact areas on the stress of the main arm;
keeping the shapes and the materials of the front lower sliding block and the rear lower sliding block unchanged, changing the sizes of the chamfers of the front lower sliding block and the rear lower sliding block, and obtaining a group of third data of the stress of the main arm influenced by the chamfers of the front lower sliding block and the rear lower sliding block.
Optionally, in the method for screening influence factors of a slider on stress of a telescopic boom according to the embodiment of the present application, the screening out main influence parameters on stress of the telescopic boom according to the multiple sets of data includes:
and screening out main influence factors on the stress of the telescopic arm support according to the first data, the second data and the third data.
Optionally, in the method for screening stress influence factors of the slider on the telescopic boom according to the embodiment of the present application, the step of setting the materials of the main arm, the telescopic arm, the front lower slider, and the rear upper slider includes:
setting the material of the main arm and the telescopic arm to HG 70;
the material of the front lower slider and the rear upper slider is set to be MC nylon.
Optionally, in the method for screening influence factors of a slider on stress of a telescopic boom according to the embodiment of the present application, the applying a load, a constraint condition, and a contact boundary condition to the telescopic boom model includes:
applying a deadweight load to the main arm and the telescopic arm;
applying a vertically downward force on the arm head of the telescopic arm;
cylindrical surface constraint is applied to the hinge point of the main arm and the hinge point of the oil cylinder, the translation of the hinge point is limited, and the hinge point is released to rotate;
applying a binding contact and a non-separating contact to the contact surface.
Optionally, in the method for screening influence factors of the slider on the stress of the telescopic boom, the telescopic boom model is established by creo three-dimensional design software.
Optionally, in the method for screening stress influence factors of the slider on the telescopic boom according to the embodiment of the present application, the shape of the slider, the material, the contact area, and the chamfering parameter are set in an ANSYS environment.
In a second aspect, an embodiment of the present application provides a system for screening stress influence factors of a slider on a telescopic boom, where the system includes: the storage comprises a program of a method for screening the stress influence factors of the sliding block on the telescopic arm support, and the program of the method for screening the stress influence factors of the sliding block on the telescopic arm support is executed by the processor to realize the following steps:
acquiring a pre-established telescopic boom model, wherein the telescopic boom model comprises an assembly model which is established according to preset size parameters and comprises a main boom, a front lower sliding block and a rear upper sliding block of a telescopic boom;
setting the materials of a main arm, a telescopic arm, a front lower sliding block and a rear upper sliding block, the contact area of the front lower sliding block and the telescopic arm, the contact area of the rear upper sliding block and the main arm and chamfering parameters of the front lower sliding block and the rear upper sliding block;
applying load, constraint conditions and contact boundary conditions to the telescopic boom model, performing meshing on the main boom and the telescopic boom by adopting shell units, performing meshing on the front lower sliding block and the rear upper sliding block by adopting entity units, and calculating to obtain a stress cloud chart value;
respectively changing one parameter of the shape, the contact area, the material and the chamfer angle of the front lower sliding block and the rear lower sliding block by adopting a variable control method to obtain a plurality of groups of data of the slider material influencing the stress of the main arm;
and screening out main influence parameters on the stress of the telescopic arm support according to the multiple groups of data.
Optionally, in the system for screening influence factors on the stress of the telescopic boom by the slider according to the embodiment of the present application, when executed by the processor, the program of the method for screening influence factors on the stress of the telescopic boom by the slider realizes the following steps:
keeping the block shapes and the contact areas of the front lower sliding block and the rear lower sliding block unchanged, and changing the materials of the front lower sliding block and the rear lower sliding block to obtain first data of a group of sliding block materials influencing the stress of the main arm;
keeping the shapes and materials of the front lower sliding block and the rear lower sliding block unchanged, and changing the contact areas of the front lower sliding block and the rear lower sliding block to obtain second data of the influence of the contact areas on the stress of the main arm;
keeping the shapes and the materials of the front lower sliding block and the rear lower sliding block unchanged, changing the sizes of the chamfers of the front lower sliding block and the rear lower sliding block, and obtaining a group of third data of the stress of the main arm influenced by the chamfers of the front lower sliding block and the rear lower sliding block.
In a third aspect, an embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium includes a program of a method for screening influence factors of stress on a telescopic boom by a slider, and when the program of the method for screening influence factors of stress on a telescopic boom by a slider is executed by a processor, the method for screening influence factors of stress on a telescopic boom by a slider as described in any one of the above steps is implemented.
From the above, in the method and system for screening stress influence factors of the slider on the telescopic boom provided in the embodiment of the application, the pre-established telescopic boom model is obtained, and the telescopic boom model includes an assembly model which is established according to preset size parameters and comprises a main boom, a front lower slider of the telescopic boom and a rear upper slider; setting the materials of a main arm, a telescopic arm, a front lower sliding block and a rear upper sliding block, the contact area of the front lower sliding block and the telescopic arm, the contact area of the rear upper sliding block and the main arm and chamfering parameters of the front lower sliding block and the rear upper sliding block; applying load, constraint conditions and contact boundary conditions to the telescopic boom model, performing meshing on the main boom and the telescopic boom by adopting shell units, performing meshing on the front lower sliding block and the rear upper sliding block by adopting entity units, and calculating to obtain a stress cloud chart value; respectively changing one parameter of the shape, the contact area, the material and the chamfer angle of the front lower sliding block and the rear lower sliding block by adopting a variable control method to obtain a plurality of groups of data of the slider material influencing the stress of the main arm; screening out main influence parameters on the stress of the telescopic arm support according to the multiple groups of data; therefore, the screening of stress influence factors is realized, and the efficiency and the accuracy can be improved. .
Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the present application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a flowchart of a method for screening influence factors of a slider on a stress of a telescopic boom according to an embodiment of the present application.
Fig. 2 is a structural diagram of a telescopic arm model provided in an embodiment of the present application.
Fig. 3 is a stress cloud of the telescopic arm.
Fig. 4 is a stress cloud of the main arm.
FIG. 5 is a stress cloud plot for a front lower slider.
Figure 6 is a stress cloud for the back top slider,
fig. 7 is a schematic structural diagram of a system for screening influence factors of a slider on a stress of a telescopic boom according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for screening influence factors of a slider on a stress of a telescopic boom in some embodiments of the present application. The method for screening the stress influence factors of the sliding block on the telescopic arm support comprises the following steps:
s101, obtaining a pre-established telescopic boom model, wherein the telescopic boom model comprises an assembly model which is established according to preset size parameters and comprises a main boom, a front lower sliding block and a rear upper sliding block of a telescopic boom;
s102, setting materials of a main arm, a telescopic arm, a front lower sliding block and a rear upper sliding block, a contact area of the front lower sliding block and the telescopic arm, a contact area of the rear upper sliding block and the main arm, and chamfering parameters of the front lower sliding block and the rear upper sliding block;
s103, applying load, constraint conditions and contact boundary conditions to the telescopic boom model, performing meshing on the main boom and the telescopic boom by adopting shell units, performing meshing on the front lower sliding block and the rear upper sliding block by adopting entity units, and calculating to obtain a stress cloud picture value;
s104, changing one parameter of the block shape, the contact area, the material and the chamfer angle of the front lower sliding block and the rear lower sliding block respectively by adopting a control variable method to obtain a plurality of groups of data of the sliding block material influencing the stress of the main arm;
and S105, screening out main influence parameters on the stress of the telescopic arm support according to the multiple groups of data.
In step S101, the structure of the telescopic arm model is as shown in fig. 2. The telescopic boom model includes an assembled model of the main boom 10, the front lower slider 30 and the rear upper slider 40 of the telescopic boom 20.
The method comprises the steps of firstly establishing and importing a model, establishing models of a main arm 10, a telescopic arm 20, a front lower slider 30 and a rear upper slider 40 in creo three-dimensional design software according to actual sizes, assembling according to the overlapping amount shown in figure 2, converting the format of the assembled model into x, t and importing the x, t and x into an ANSYS/Workbench interface.
In step S102, the materials of the main arm 10, the telescopic arm 20, the front lower slider 30, and the rear upper slider 40, the contact area between the front lower slider 30 and the telescopic arm 20, the contact area between the rear upper slider 40 and the main arm 10, and the chamfering parameters of the front lower slider 30 and the rear upper slider 40 are set in the ANSYS environment.
In step S103, a load and a constraint condition are applied to the assembly model, a contact boundary condition is set, a self-weight load is applied to the main arm 01 and the telescopic arm 20, a vertically downward load of 10000N is applied to the arm head of the telescopic arm 20, cylindrical surface constraint is applied to the hinge point of the main arm 10 and the hinge point of the oil cylinder, the translation of the hinge point is limited, and the rotation of the hinge point is released. Applying a binding contact and a non-separating contact to the contact surface. As shown in fig. 3-6, fig. 3 is a stress cloud chart of the telescopic boom, fig. 4 is a stress cloud chart of the main boom, fig. 5 is a stress cloud chart of the front lower slider, fig. 6 is a stress cloud chart of the rear upper slider,
in step S104, the block shapes and the contact areas of the front lower slider and the rear lower slider are kept unchanged, and the materials of the front lower slider and the rear lower slider are changed to obtain first data of a group of slider materials influencing the stress of the main arm; keeping the shapes and materials of the front lower sliding block and the rear lower sliding block unchanged, and changing the contact areas of the front lower sliding block and the rear lower sliding block to obtain second data of the influence of the contact areas on the stress of the main arm; keeping the shapes and the materials of the front lower sliding block and the rear lower sliding block unchanged, changing the sizes of the chamfers of the front lower sliding block and the rear lower sliding block, and obtaining a group of third data of the stress of the main arm influenced by the chamfers of the front lower sliding block and the rear lower sliding block.
In step S105, the main influence factors on the stress of the telescopic boom are screened out according to the first data, the second data and the third data. For example, if the force variation condition is most obvious when a certain parameter is changed when other parameters are not changed, the changed parameter can be used as the main influence factor.
In some embodiments, the step of setting the material of the main arm, the telescopic arm, the front lower slider, and the rear upper slider includes: setting the material of the main arm and the telescopic arm to HG 70; the material of the front lower slider and the rear upper slider is set to be MC nylon. Of course, it is not limited thereto.
In some embodiments, this step applies loads, constraints, and contact boundary conditions to the telescopic arm model, including: applying a deadweight load to the main arm and the telescopic arm; applying a vertically downward force on the arm head of the telescopic arm; cylindrical surface constraint is applied to the hinge point of the main arm and the hinge point of the oil cylinder, the translation of the hinge point is limited, and the hinge point is released to rotate; applying a binding contact and a non-separating contact to the contact surface.
From the above, in the method for screening stress influence factors of the sliding block on the telescopic boom provided in the embodiment of the application, the pre-established telescopic boom model is obtained, and the telescopic boom model includes an assembly model which is established according to the preset size parameters and comprises the main boom, the front lower sliding block and the rear upper sliding block of the telescopic boom; setting the materials of a main arm, a telescopic arm, a front lower sliding block and a rear upper sliding block, the contact area of the front lower sliding block and the telescopic arm, the contact area of the rear upper sliding block and the main arm and chamfering parameters of the front lower sliding block and the rear upper sliding block; applying load, constraint conditions and contact boundary conditions to the telescopic boom model, performing meshing on the main boom and the telescopic boom by adopting shell units, performing meshing on the front lower sliding block and the rear upper sliding block by adopting entity units, and calculating to obtain a stress cloud chart value; respectively changing one parameter of the shape, the contact area, the material and the chamfer angle of the front lower sliding block and the rear lower sliding block by adopting a variable control method to obtain a plurality of groups of data of the slider material influencing the stress of the main arm; screening out main influence parameters on the stress of the telescopic arm support according to the multiple groups of data; therefore, the screening of stress influence factors is realized, and the efficiency and the accuracy can be improved.
As shown in fig. 7, an embodiment of the present application provides a system for screening stress influence factors of a slider on a telescopic boom, where the system includes: the storage 201 comprises a program of a method for screening influence factors of a slider on the stress of the telescopic boom, and the program of the method for screening the influence factors of the slider on the stress of the telescopic boom is executed by the processor to realize the following steps:
acquiring a pre-established telescopic boom model, wherein the telescopic boom model comprises an assembly model which is established according to preset size parameters and comprises a main boom, a front lower sliding block and a rear upper sliding block of a telescopic boom; setting the materials of a main arm, a telescopic arm, a front lower sliding block and a rear upper sliding block, the contact area of the front lower sliding block and the telescopic arm, the contact area of the rear upper sliding block and the main arm and chamfering parameters of the front lower sliding block and the rear upper sliding block; applying load, constraint conditions and contact boundary conditions to the telescopic boom model, performing meshing on the main boom and the telescopic boom by adopting shell units, performing meshing on the front lower sliding block and the rear upper sliding block by adopting entity units, and calculating to obtain a stress cloud chart value; respectively changing one parameter of the shape, the contact area, the material and the chamfer angle of the front lower sliding block and the rear lower sliding block by adopting a variable control method to obtain a plurality of groups of data of the slider material influencing the stress of the main arm; and screening out main influence parameters on the stress of the telescopic arm support according to the multiple groups of data.
The structure of the telescopic arm model is shown in fig. 2. The telescopic boom model includes an assembled model of the main boom 10, the front lower slider 30 and the rear upper slider 40 of the telescopic boom 20.
The method comprises the steps of firstly establishing and importing a model, establishing models of a main arm 10, a telescopic arm 20, a front lower slider 30 and a rear upper slider 40 in creo three-dimensional design software according to actual sizes, assembling according to the overlapping amount shown in figure 2, converting the format of the assembled model into x, t and importing the x, t and x into an ANSYS/Workbench interface.
In the ANSYS environment, the materials of the main arm 10, the telescopic arm 20, the front lower slider 30, and the rear upper slider 40, the contact area between the front lower slider 30 and the telescopic arm 20, the contact area between the rear upper slider 40 and the main arm 10, and the chamfering parameters of the front lower slider 30 and the rear upper slider 40 are set.
The method comprises the steps of applying load and constraint conditions to an assembly model, setting contact boundary conditions, applying dead weight load to a main arm 01 and a telescopic arm 20, applying vertical downward load 10000N to the arm head of the telescopic arm 20, applying cylindrical surface constraint to a hinge point of a main arm 10 and a hinge point of an oil cylinder, limiting the translation of the hinge point, and releasing the rotation of the hinge point. Applying a binding contact and a non-separating contact to the contact surface.
Keeping the block shapes and the contact areas of the front lower sliding block and the rear lower sliding block unchanged, and changing the materials of the front lower sliding block and the rear lower sliding block to obtain first data of a group of sliding block materials influencing the stress of the main arm; keeping the shapes and materials of the front lower sliding block and the rear lower sliding block unchanged, and changing the contact areas of the front lower sliding block and the rear lower sliding block to obtain second data of the influence of the contact areas on the stress of the main arm; keeping the shapes and the materials of the front lower sliding block and the rear lower sliding block unchanged, changing the sizes of the chamfers of the front lower sliding block and the rear lower sliding block, and obtaining a group of third data of the stress of the main arm influenced by the chamfers of the front lower sliding block and the rear lower sliding block.
And screening out main influence factors on the stress of the telescopic arm support according to the first data, the second data and the third data. For example, if the force variation condition is most obvious when a certain parameter is changed when other parameters are not changed, the changed parameter can be used as the main influence factor.
In some embodiments, when executed by the processor, the program of the method for screening influence factors of the slider on the stress of the telescopic boom realizes the following steps: setting the material of the main arm and the telescopic arm to HG 70; the material of the front lower slider and the rear upper slider is set to be MC nylon. Of course, it is not limited thereto.
In some embodiments, when executed by the processor, the program of the method for screening influence factors of the slider on the stress of the telescopic boom realizes the following steps: applying a deadweight load to the main arm and the telescopic arm; applying a vertically downward force on the arm head of the telescopic arm; cylindrical surface constraint is applied to the hinge point of the main arm and the hinge point of the oil cylinder, the translation of the hinge point is limited, and the hinge point is released to rotate; applying a binding contact and a non-separating contact to the contact surface.
From the above, in the system for screening stress influence factors of the slider on the telescopic boom provided in the embodiment of the application, a pre-established telescopic boom model is obtained, and the telescopic boom model includes an assembly model which is established according to preset size parameters and comprises a main boom, a front lower slider of the telescopic boom and a rear upper slider; setting the materials of a main arm, a telescopic arm, a front lower sliding block and a rear upper sliding block, the contact area of the front lower sliding block and the telescopic arm, the contact area of the rear upper sliding block and the main arm and chamfering parameters of the front lower sliding block and the rear upper sliding block; applying load, constraint conditions and contact boundary conditions to the telescopic boom model, performing meshing on the main boom and the telescopic boom by adopting shell units, performing meshing on the front lower sliding block and the rear upper sliding block by adopting entity units, and calculating to obtain a stress cloud chart value; respectively changing one parameter of the shape, the contact area, the material and the chamfer angle of the front lower sliding block and the rear lower sliding block by adopting a variable control method to obtain a plurality of groups of data of the slider material influencing the stress of the main arm; screening out main influence parameters on the stress of the telescopic arm support according to the multiple groups of data; therefore, the screening of stress influence factors is realized, and the efficiency and the accuracy can be improved.
The embodiment of the present application provides a storage medium, and when being executed by a processor, the computer program performs the method in any optional implementation manner of the above embodiment. The method specifically comprises the following steps: the method comprises the steps that a pre-established telescopic boom model is obtained, wherein the telescopic boom model comprises an assembly model which is established according to preset size parameters and comprises a main boom, a front lower sliding block and a rear upper sliding block of a telescopic boom; setting the materials of a main arm, a telescopic arm, a front lower sliding block and a rear upper sliding block, the contact area of the front lower sliding block and the telescopic arm, the contact area of the rear upper sliding block and the main arm and chamfering parameters of the front lower sliding block and the rear upper sliding block; applying load, constraint conditions and contact boundary conditions to the telescopic boom model, performing meshing on the main boom and the telescopic boom by adopting shell units, performing meshing on the front lower sliding block and the rear upper sliding block by adopting entity units, and calculating to obtain a stress cloud chart value; respectively changing one parameter of the shape, the contact area, the material and the chamfer angle of the front lower sliding block and the rear lower sliding block by adopting a variable control method to obtain a plurality of groups of data of the slider material influencing the stress of the main arm; screening out main influence parameters on the stress of the telescopic arm support according to the multiple groups of data; therefore, the screening of stress influence factors is realized, and the efficiency and the accuracy can be improved.
The storage medium may be implemented by any type of volatile or nonvolatile storage device or combination thereof, such as a Static Random Access Memory (SRAM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), an Erasable Programmable Read-Only Memory (EPROM), a Programmable Read-Only Memory (PROM), a Read-Only Memory (ROM), a magnetic Memory, a flash Memory, a magnetic disk, or an optical disk.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A method for screening stress influence factors of a sliding block on a telescopic arm support is characterized by comprising the following steps:
acquiring a pre-established telescopic boom model, wherein the telescopic boom model comprises an assembly model which is established according to preset size parameters and comprises a main boom, a front lower sliding block and a rear upper sliding block of a telescopic boom;
setting the materials of a main arm, a telescopic arm, a front lower sliding block and a rear upper sliding block, the contact area of the front lower sliding block and the telescopic arm, the contact area of the rear upper sliding block and the main arm and chamfering parameters of the front lower sliding block and the rear upper sliding block;
applying load, constraint conditions and contact boundary conditions to the telescopic boom model, performing meshing on the main boom and the telescopic boom by adopting shell units, performing meshing on the front lower sliding block and the rear upper sliding block by adopting entity units, and calculating to obtain a stress cloud chart value;
respectively changing one parameter of the shape, the contact area, the material and the chamfer angle of the front lower sliding block and the rear lower sliding block by adopting a variable control method to obtain a plurality of groups of data of the slider material influencing the stress of the main arm;
and screening out main influence parameters on the stress of the telescopic arm support according to the multiple groups of data.
2. The method for screening the influence factors of the slider on the stress of the telescopic boom according to claim 1, wherein the step of respectively changing one parameter of the slider shape, the contact area, the material and the chamfer angle of the front lower slider and the rear lower slider by using a controlled variable method to obtain multiple groups of data of the slider material influencing the stress of the main boom comprises the following steps:
keeping the block shapes and the contact areas of the front lower sliding block and the rear lower sliding block unchanged, and changing the materials of the front lower sliding block and the rear lower sliding block to obtain first data of a group of sliding block materials influencing the stress of the main arm;
keeping the shapes and materials of the front lower sliding block and the rear lower sliding block unchanged, and changing the contact areas of the front lower sliding block and the rear lower sliding block to obtain second data of the influence of the contact areas on the stress of the main arm;
keeping the shapes and the materials of the front lower sliding block and the rear lower sliding block unchanged, changing the sizes of the chamfers of the front lower sliding block and the rear lower sliding block, and obtaining a group of third data of the stress of the main arm influenced by the chamfers of the front lower sliding block and the rear lower sliding block.
3. The method for screening influence factors of the slider on the stress of the telescopic boom according to claim 2, wherein the screening of the main influence parameters on the stress of the telescopic boom according to the plurality of groups of data comprises:
and screening out main influence factors on the stress of the telescopic arm support according to the first data, the second data and the third data.
4. The method for screening the stress influence factors of the sliding blocks on the telescopic arm support according to claim 1, wherein the step of setting the materials of the main arm, the telescopic arm, the front lower sliding block and the rear upper sliding block comprises the following steps:
setting the material of the main arm and the telescopic arm to HG 70;
the material of the front lower slider and the rear upper slider is set to be MC nylon.
5. The method for screening the stress influence factors of the sliding block on the telescopic boom according to claim 1, wherein the applying the load, the constraint condition and the contact boundary condition to the telescopic boom model comprises:
applying a deadweight load to the main arm and the telescopic arm;
applying a vertically downward force on the arm head of the telescopic arm;
cylindrical surface constraint is applied to the hinge point of the main arm and the hinge point of the oil cylinder, the translation of the hinge point is limited, and the hinge point is released to rotate;
applying a binding contact and a non-separating contact to the contact surface.
6. The method for screening the stress influence factors of the sliding block on the telescopic arm support according to claim 1, wherein the telescopic arm model is established by creo three-dimensional design software.
7. The method for screening stress influence factors of the sliding block on the telescopic boom according to claim 1, wherein the shape of the sliding block, the material, the contact area and the chamfering parameter are set in an ANSYS environment.
8. The utility model provides a screening slider is to telescopic cantilever crane atress influence factor system which characterized in that, this system includes: the storage comprises a program of a method for screening the stress influence factors of the sliding block on the telescopic arm support, and the program of the method for screening the stress influence factors of the sliding block on the telescopic arm support is executed by the processor to realize the following steps:
acquiring a pre-established telescopic boom model, wherein the telescopic boom model comprises an assembly model which is established according to preset size parameters and comprises a main boom, a front lower sliding block and a rear upper sliding block of a telescopic boom;
setting the materials of a main arm, a telescopic arm, a front lower sliding block and a rear upper sliding block, the contact area of the front lower sliding block and the telescopic arm, the contact area of the rear upper sliding block and the main arm and chamfering parameters of the front lower sliding block and the rear upper sliding block;
applying load, constraint conditions and contact boundary conditions to the telescopic boom model, performing meshing on the main boom and the telescopic boom by adopting shell units, performing meshing on the front lower sliding block and the rear upper sliding block by adopting entity units, and calculating to obtain a stress cloud chart value;
respectively changing one parameter of the shape, the contact area, the material and the chamfer angle of the front lower sliding block and the rear lower sliding block by adopting a variable control method to obtain a plurality of groups of data of the slider material influencing the stress of the main arm;
and screening out main influence parameters on the stress of the telescopic arm support according to the multiple groups of data.
9. The system for screening influence factors of slider on telescopic boom stress of claim 8, wherein the program of the method for screening influence factors of slider on telescopic boom stress is executed by the processor to implement the following steps:
keeping the block shapes and the contact areas of the front lower sliding block and the rear lower sliding block unchanged, and changing the materials of the front lower sliding block and the rear lower sliding block to obtain first data of a group of sliding block materials influencing the stress of the main arm;
keeping the shapes and materials of the front lower sliding block and the rear lower sliding block unchanged, and changing the contact areas of the front lower sliding block and the rear lower sliding block to obtain second data of the influence of the contact areas on the stress of the main arm;
keeping the shapes and the materials of the front lower sliding block and the rear lower sliding block unchanged, changing the sizes of the chamfers of the front lower sliding block and the rear lower sliding block, and obtaining a group of third data of the stress of the main arm influenced by the chamfers of the front lower sliding block and the rear lower sliding block.
10. A computer-readable storage medium, wherein the computer-readable storage medium includes a program of a method for screening influence factors of slider on telescopic boom stress, and when the program of the method for screening influence factors of slider on telescopic boom stress is executed by a processor, the steps of the method for screening influence factors of slider on telescopic boom stress according to any one of claims 1 to 7 are implemented.
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