CN113239581A - Method for analyzing strength of frame of off-highway dump truck - Google Patents
Method for analyzing strength of frame of off-highway dump truck Download PDFInfo
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- CN113239581A CN113239581A CN202110363040.2A CN202110363040A CN113239581A CN 113239581 A CN113239581 A CN 113239581A CN 202110363040 A CN202110363040 A CN 202110363040A CN 113239581 A CN113239581 A CN 113239581A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/04—Constraint-based CAD
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Abstract
The invention discloses a method for analyzing the strength of a frame of an off-highway dump truck, which comprises the following steps: establishing a finite element analysis model of the frame of the off-road dumper; editing a load script file, wherein the load script file comprises load data of multiple working conditions, and the load data of each working condition corresponds to a load number; editing a working condition script file, wherein the working condition script file comprises a plurality of working condition information, and each working condition information comprises a load number corresponding to the working condition; editing an intensity analysis script file, wherein the intensity analysis script file comprises a static solving method and a virtual constraint method, and is loaded with a finite element analysis model, a load script file and a working condition script file of the frame of the off-road dumper; and submitting the strength analysis script file to a solver to obtain a strength analysis result of the frame of the off-road dumper. The invention can realize the advantages of simpler, more efficient and reliable analysis of the strength of the frame of the off-highway dumper.
Description
Technical Field
The present invention relates to the field of vehicle design. More specifically, the invention relates to a method for analyzing the strength of an off-highway dump truck frame.
Background
According to market demands, the tonnage of the off-highway dump truck product is continuously increased, and the truck types all operate in a severe mining area environment, so that great examination is brought to the reliability of the frame of the core bearing part. The most cost-saving and effective method for verifying the reliability of the frame is to perform strength durable virtual simulation analysis on the frame, find out the position with insufficient strength in the frame design, perform local optimization and perform real vehicle tracking verification. However, during the simulation analysis of the frame strength, the number of working conditions to be analyzed is large, the load capacity is large, the constraint is difficult to determine, the calculation time is long, and the data import under each working condition needs the operation of a worker, so that the working time of the worker is long, and the worker is prone to making mistakes, so that the wrong conclusion can be easily obtained from the frame strength analysis result, the wrong design can be further guided, and great hidden danger can be brought to the frame reliability.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
The invention also aims to provide a method for analyzing the strength of the frame of the off-highway dumper, which has the advantages of simplicity, high efficiency and reliability in analyzing the strength of the frame of the off-highway dumper.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided an off-highway dump truck frame strength analysis method, comprising:
establishing a finite element analysis model of the frame of the off-road dumper;
editing a load script file, wherein the load script file comprises load data of multiple working conditions, and the load data of each working condition corresponds to a load number;
editing a working condition script file, wherein the working condition script file comprises a plurality of working condition information, and each working condition information comprises a load number corresponding to the working condition;
editing an intensity analysis script file, wherein the intensity analysis script file comprises a static solving method and a virtual constraint method, and is loaded with a finite element analysis model, a load script file and a working condition script file of the frame of the off-road dumper;
and submitting the strength analysis script file to a solver to obtain a strength analysis result of the frame of the off-road dumper.
Preferably, in the finite element analysis model of the off-highway dump truck frame: GAP units are established between the frame longitudinal beams and the lining beams; mass units are built in the mass center positions of the assemblies mounted on the frame, each mass unit gives the corresponding assembly actual mass, and each mass unit is connected with the mounting point of the frame by rbe3 units; rbe2 units are respectively established at the positions of the brackets for connecting the frame and the chassis.
Preferably, in the finite element analysis model of the off-road dumper frame, the main node of the rbe2 unit is configured with a node number convenient for identification; in the load script file, the load in the load data of each working condition is configured with the node number of the corresponding loading node.
Preferably, the load script file is edited according to the format requirements of the force and the moment in the hypermesh, and the load data of each working condition is obtained from the whole vehicle dynamics load under the working condition.
Preferably, each of the operation condition information further includes a name of the operation condition and a number of the operation condition.
Preferably, the virtual constraint method in the intensity analysis script file is an inertial release algorithm.
Preferably, the solver is an optistruct solver or a nanostran solver.
Preferably, the method further comprises the following steps: and viewing a result file obtained by the solver in a hyperview post processor, wherein the result file is in a format of h3d and/or op 2.
The invention at least comprises the following beneficial effects: according to the invention, the load script file and the working condition script file are edited to enable the load data of multiple working conditions to be concentrated in one script file and enable the multiple working condition information to be concentrated in another script file, and when the frame strength is analyzed, the strength analysis script file can lead in the load data of multiple working conditions and the multiple working condition information at one time. The invention also adopts a virtual constraint method of inertial release, so that the problem that node constraint is difficult to determine in the prior art is solved under the condition that the accuracy of the frame strength analysis result is kept. In addition, the stress condition of each part of the frame under different working conditions and loads can be simulated more accurately by combining a finite element analysis model of the frame established by the actual structure of the frame of the off-highway dump truck.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a flow chart of an embodiment of the method of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the drawings and examples so that those skilled in the art can practice the invention with reference to the description.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings and the embodiments, are only for convenience of description and simplicity of 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 thus, are not to be construed as limiting the present invention.
The embodiment of the invention is applied to a finite element analysis device of a frame, and the finite element analysis device of the frame can comprise: a processor, such as a central processing unit, a communication bus, a user interface, a network interface, a memory. Wherein the communication bus is used for realizing connection communication among the components. The user interface may comprise a display screen, an input unit such as a keyboard, and the optional user interface may also comprise a standard wired interface, a wireless interface. The network interface may optionally include standard wired, wireless interfaces. The memory may be a high speed random access memory or may be a stable non-volatile memory such as a disk memory. The memory may alternatively be a storage device separate from the aforementioned processor. The memory, which is a storage medium, may include an operating system, a network communication module, a user interface module, and a carriage finite element analysis program.
In the finite element analysis equipment of the frame, a network interface is mainly used for carrying out data communication with a network server; the user interface is mainly used for data interaction with a user; the finite element analysis equipment of the frame calls a finite element analysis program of the frame stored in the memory through the processor and executes the frame strength analysis method provided by the embodiment of the invention
As shown in fig. 1, an embodiment of the present invention provides a method for analyzing a frame strength of an off-highway dump truck, including the following steps:
s101, establishing a finite element analysis model of the frame of the off-highway dump truck;
it should be understood that the executing subject of this embodiment is a finite element analysis device of a vehicle frame, and the finite element analysis device of a vehicle frame may be a computer or a server installed with a finite element analysis program of a vehicle frame, or may be other devices capable of implementing the same function, which is not limited in this embodiment.
The method for establishing the finite element analysis model of the off-road dumper frame is characterized in that the finite element analysis model is obtained by establishing the finite element model of the off-road dumper frame through HypermeSh software.
Further, in order to be close to the actual whole vehicle structure, the finite element analysis model of the frame of the off-highway dump truck is set as follows: establishing a GAP unit between the frame longitudinal beam and the lining beam for simulating contact; establishing mass units at respective mass center positions of a plurality of assemblies mounted on a frame, wherein each mass unit is endowed with corresponding assembly actual mass, and each mass unit is connected with a mounting point of the frame by rbe3 units, wherein the plurality of assemblies comprise: the device comprises a cab assembly, a platform and accessory assembly, a power assembly, a battery box assembly, an oil tank assembly, a full-load container assembly and the like; rbe2 units are respectively established at the positions of the brackets for connecting the frame and the chassis, and node numbers convenient to identify are configured at the main node of rbe2 units.
S102, editing a load script file, wherein the load script file comprises load data of multiple working conditions, and the load data of each working condition corresponds to a load number;
the working condition refers to the running condition of the off-highway dump truck, and specifically comprises the following steps: the constant-speed running condition, the acceleration condition, the braking condition, the steering condition, the torsion condition and the like.
The load data of each working condition is derived from the whole vehicle dynamics load taking of the corresponding working condition.
Specifically, the load script file is edited according to the format requirements of the force and the moment in the hypermesh, and the load in the load data of each working condition is configured with the node number of the corresponding loading node.
S103, editing a working condition script file, wherein the working condition script file comprises a plurality of working condition information, and each working condition information comprises a load number corresponding to the working condition;
further, each type of operating condition information may further include an operating condition name and an operating condition number of the operating condition.
S104, editing an intensity analysis script file, wherein the intensity analysis script file comprises a static solving method and a virtual constraint method, and is loaded with a finite element analysis model, a load script file and a working condition script file of the frame of the off-road dumper;
specifically, the virtual constraint method in the intensity analysis script file may be an inertial release algorithm.
And S105, submitting the strength analysis script file to a solver to obtain a strength analysis result of the frame of the off-road dumper.
Specifically, the solver may be an optistruct solver or a nanostran solver.
Further, the method of this embodiment may further include: and viewing a result file obtained by the solver in a hyperview post processor, wherein the result file is in a format of h3d and/or op 2.
In addition, the frame strength analysis method indicated by the invention has the advantages that the working condition script file and the strength analysis script file have universality and can be used for strength analysis of other frames or structural members of the same type, a finite element analysis model of an analysis object needs to be re-established according to different vehicle types, the load script file needs to be dynamically loaded again according to the analysis object, and the force and moment in the load script file can be subjected to strength analysis by replacing the result of the dynamic loading.
The frame strength analysis method indicated by the invention is applied to frame strength analysis of the off-highway dump truck of a company, and the strength analysis result can reflect the part with insufficient strength in the frame design and is consistent with the problem of actual failure of an actual vehicle. After being properly optimized, the product is verified to be free of faults in the market for one year.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable to various fields of endeavor for which the invention may be embodied with additional modifications as would be readily apparent to those skilled in the art, and the invention is therefore not limited to the details given herein and to the embodiments shown and described without departing from the generic concept as defined by the claims and their equivalents.
Claims (8)
1. The method for analyzing the strength of the frame of the off-road dumper is characterized by comprising the following steps of:
establishing a finite element analysis model of the frame of the off-road dumper;
editing a load script file, wherein the load script file comprises load data of multiple working conditions, and the load data of each working condition corresponds to a load number;
editing a working condition script file, wherein the working condition script file comprises a plurality of working condition information, and each working condition information comprises a load number corresponding to the working condition;
editing an intensity analysis script file, wherein the intensity analysis script file comprises a static solving method and a virtual constraint method, and is loaded with a finite element analysis model, a load script file and a working condition script file of the frame of the off-road dumper;
and submitting the strength analysis script file to a solver to obtain a strength analysis result of the frame of the off-road dumper.
2. The method of analyzing frame strength of an off-highway dump truck frame of claim 1, wherein in the finite element analysis model of the off-highway dump truck frame: GAP units are established between the frame longitudinal beams and the lining beams; mass units are built in the mass center positions of the assemblies mounted on the frame, each mass unit gives the corresponding assembly actual mass, and each mass unit is connected with the mounting point of the frame by rbe3 units; rbe2 units are respectively established at the positions of the brackets for connecting the frame and the chassis.
3. The method of analyzing frame strength of an off-road dump truck of claim 2, wherein in the finite element analysis model of the off-road dump truck frame, the master node of rbe2 is configured with a node number for easy identification; in the load script file, the load in the load data of each working condition is configured with the node number of the corresponding loading node.
4. The method of analyzing frame strength of an off-road dumper frame according to claim 1, wherein the load script file is edited according to the format requirements of force and moment in hypermesh, and the load data of each working condition is obtained from the whole dumper dynamics load under the working condition.
5. The method of analyzing frame strength of an off-highway dump truck according to claim 1, wherein each condition information further comprises a name of the condition and a number of the condition.
6. The method of analyzing frame strength of an off-highway dump truck according to claim 1, wherein the virtual constraint method in the strength analysis script file is an inertial release algorithm.
7. The method for analyzing frame strength of an off-highway dump truck according to claim 1, wherein the solver is an optistruct solver or a nanostran solver.
8. The method of analyzing frame strength of an off-highway dump truck according to claim 7, further comprising: and viewing a result file obtained by the solver in a hyperview post processor, wherein the result file is in a format of h3d and/or op 2.
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