CN116522645A - Knuckle strength endurance modeling simulation method, device, terminal and medium - Google Patents
Knuckle strength endurance modeling simulation method, device, terminal and medium Download PDFInfo
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Abstract
A knuckle strength durability modeling simulation method, a knuckle strength durability modeling simulation device, a knuckle strength durability modeling simulation terminal and a knuckle strength durability modeling simulation storage medium are used for acquiring suspension system parameter table data and establishing a beam unit equivalent suspension system model according to the suspension system parameter table data; calculating the rigidity of a real structural connection point of the suspension system, and adjusting the diameter of a beam unit of the beam unit equivalent suspension system model until the rigidity of the beam unit is consistent with the real structural rigidity of the suspension system to obtain the beam unit equivalent suspension system with the adjusted diameter; giving materials and section properties to the real structure of the suspension system, replacing the knuckle in the real structure of the suspension system with the materials and section properties, and deleting the knuckle equivalent beam unit in the beam unit equivalent suspension system with the adjusted diameter to obtain a final suspension system model; and applying constraint conditions to the final suspension system model under the whole vehicle coordinate system, and calculating the strength durability of the knuckle under the load working condition.
Description
Technical Field
The invention discloses a knuckle strength durability modeling simulation method, a knuckle strength durability modeling simulation device, a terminal and a medium, and belongs to the technical field of modeling simulation.
Background
The general flow of development of chassis suspension knuckle strength durability performance is as follows: the method comprises the steps that a load development engineer establishes a suspension multi-rigid-body dynamic model, loads of hard points (connecting points of a steering knuckle and other structures) of a steering knuckle structure are decomposed through applying working condition loads to a wheel center, a steering knuckle strength durability calculation engineer divides grids, steering knuckle materials and section properties are given, constraints (boundary conditions) are applied to the steering knuckle, the working condition loads obtained through decomposition of the load development engineer are applied to the steering knuckle, stress, strain and damage of the steering knuckle under the working conditions are calculated, and whether the steering knuckle meets strength durability requirements is evaluated according to evaluation criteria.
However, the clamping load between the brake calipers and the brake disc in the brake working condition cannot be directly decomposed based on the load decomposition of the multi-rigid body, so that the simulation precision of the knuckle and the brake calipers connecting bracket is affected; secondly, the load decomposition based on multi-body dynamics takes the structure as a rigid body, the rigid body is non-deformable, and the actual structure is deformable, so that the structural load obtained by the decomposition is larger than the actual load; and when the strength of the steering knuckle is calculated independently and durable, 1-6 degrees of freedom full constraint needs to be applied to the center of the steering knuckle, and the full constraint state is not completely matched with the actual situation, so that the calculation accuracy is affected.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a knuckle strength durability modeling simulation method, a knuckle strength durability modeling simulation device, a knuckle strength durability modeling simulation terminal and a knuckle strength durability modeling simulation medium, wherein the knuckle strength durability modeling simulation method is based on equivalent beam unit rigidity, and the knuckle strength durability simulation precision is improved.
The technical scheme of the invention is as follows:
according to a first aspect of an embodiment of the present invention, there is provided a knuckle strength durability modeling simulation method, including:
acquiring suspension system parameter table data, and establishing a beam unit equivalent suspension system model according to the suspension system parameter table data;
calculating the rigidity of a real structural connection point of the suspension system, and adjusting the diameter of a beam unit of the beam unit equivalent suspension system model until the rigidity of the beam unit is consistent with the real structural rigidity of the suspension system to obtain the beam unit equivalent suspension system with the adjusted diameter;
giving materials and section properties to the real structure of the suspension system, and replacing the knuckle in the real structure of the suspension system with the knuckle with the adjusted diameter to obtain a final suspension system model;
constraint conditions are applied to the final suspension system model, and the strength durability of the knuckle under the load working condition is calculated;
judging whether the deformation result of the final suspension system model is correct according to the strength durability of the knuckle under the corresponding load working condition, and if so, acquiring the knuckle stress and equivalent plastic strain result in the final suspension system model.
Preferably, the suspension system parameter table data at least includes: suspension system hard point coordinates, bushings, and spring rate.
Preferably, the calculating the real structural connection point stiffness of the suspension system includes: and calculating the axial rigidity of the control arm, the rigidity of the auxiliary frame connecting point and the rigidity of the steering knuckle connecting point.
Preferably, the whole vehicle coordinate system includes: the whole car is directed from the head to the tail to be in an X-axis forward direction and in a vertical upward direction to be in a Z-axis forward direction, and a Y-axis forward direction is obtained through the X-axis forward direction and the Z-axis forward direction.
Preferably, the load conditions include: braking-type operating conditions and non-braking-type operating conditions.
Preferably, the applying the constraint includes:
the application constraint conditions of the braking working condition and the non-braking working condition are the same, the upper point of the shock absorber, the inner point of the upper control arm, the connection point of the auxiliary frame and the vehicle body are all constrained, and the degree of freedom constraints of an X axis, a Y axis and a Z axis and the degree of freedom rotation direction constraints of the X axis, the Y axis and the Z axis are applied under the whole vehicle coordinate system, wherein:
when the brake is in the working condition, the brake disc transmits moment load to the knuckle through the brake caliper under the clamping action of the brake caliper;
and when the non-braking working condition is adopted, the working condition loads are directly applied to the wheel center.
Preferably, the strength durability performance of the calculated steering knuckle under the load working condition is calculated by using ABAQUS software.
According to a second aspect of an embodiment of the present invention, there is provided a knuckle strength durability modeling simulation apparatus including:
the building module is used for obtaining suspension system parameter table data and building a beam unit equivalent suspension system model according to the suspension system parameter table data;
the adjusting module is used for calculating the rigidity of a real structural connection point of the suspension system, and adjusting the diameter of the beam unit equivalent suspension system model until the rigidity of the beam unit is consistent with the real structural rigidity of the suspension system to obtain the beam unit equivalent suspension system with the adjusted diameter;
the replacing module is used for endowing the real structure of the suspension system with material and section properties, and replacing the knuckle in the real structure of the suspension system with the material and section properties with the knuckle equivalent beam unit in the beam unit equivalent suspension system with the diameter adjusted to obtain a final suspension system model;
the calculation module is used for applying constraint conditions to the final suspension system model and calculating the strength durability of the knuckle under the load working condition;
and the judging module is used for judging whether the deformation result of the final suspension system model is correct according to the strength durability of the knuckle under the corresponding load working condition, and if so, acquiring the knuckle stress and equivalent plastic strain result in the final suspension system model.
The invention has the beneficial effects that:
the utility model provides a knuckle intensity durable modeling simulation method, device, terminal and medium, through beam unit rigidity equivalent method, compare with knuckle single piece calculation method, the rigidity boundary of knuckle suspension system calculation method is closer to actual conditions to promote simulation precision. The simulation precision is further improved by restraining points directly connected with the vehicle body, such as an upper control arm inner point, a damper upper point, a subframe hard point and the like, consistent with the actual situation, and for braking working conditions, the braking moment is equivalently acted on the knuckle by a couple equivalent principle, and the rest of the knuckle is a beam unit except the actual structure, so that excessive joints and units are not added, and the calculation period is not increased.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
FIG. 1 is a flowchart illustrating a knuckle strength durability modeling simulation method in accordance with an exemplary embodiment;
FIG. 2 is a flowchart illustrating a knuckle strength durability modeling simulation method in accordance with an exemplary embodiment;
FIG. 3 is a finite element model diagram of a beam unit equivalent double wishbone suspension system in a knuckle strength durability modeling simulation method according to one exemplary embodiment;
FIG. 4 is a schematic illustration of a control arm structure axial stiffness calculation model in a knuckle strength durability modeling simulation method, according to an exemplary embodiment;
FIG. 5 is a schematic illustration of an equivalent beam unit model axial stiffness calculation model in a knuckle strength durability modeling simulation method, according to an exemplary embodiment;
FIG. 6 is a schematic diagram illustrating a sub-frame structure joint stiffness calculation model in a knuckle strength durability modeling simulation method, according to an example embodiment.
FIG. 7 is a schematic diagram illustrating a calculation model of the stiffness of the beam unit equivalent subframe connection point in a method for modeling and simulating the strength and durability of a steering knuckle, according to an exemplary embodiment;
FIG. 8 is a schematic diagram illustrating a calculation model of the joint stiffness of a knuckle structure in a knuckle strength durability modeling simulation method, according to an exemplary embodiment;
FIG. 9 is a model of the calculation of the stiffness of the beam unit stiffness equivalent knuckle joint in a knuckle strength durability modeling simulation method, according to an exemplary embodiment;
FIG. 10 is a representation of a finite element model of a beam unit stiffness equivalent double wishbone suspension system in a knuckle strength durability modeling simulation method in accordance with an exemplary embodiment;
FIG. 11 is a schematic illustration of a final suspension system model in a knuckle strength durability modeling simulation method, according to an exemplary embodiment;
FIG. 12 is a schematic illustration of the knuckle couple equivalent loading in a knuckle strength durability modeling simulation method, according to an example embodiment;
FIG. 13 is a schematic block diagram illustrating a knuckle strength durability modeling simulation apparatus in accordance with an exemplary embodiment;
fig. 14 is a schematic block diagram illustrating a terminal structure according to an exemplary embodiment.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The embodiment of the invention provides a knuckle strength durability modeling simulation method, which is realized by a terminal, wherein the terminal can be a desktop computer or a notebook computer and the like, and at least comprises a CPU and the like.
Example 1
FIGS. 1 and 2 are flowcharts illustrating a method of knuckle strength durability modeling simulation for use in a terminal, according to an exemplary embodiment, the method comprising the steps of:
step 101, acquiring suspension system parameter table data, and establishing a beam unit equivalent suspension system model according to the suspension system parameter table data, wherein the specific contents are as follows:
according to a suspension system parameter table, which contains hard point coordinates, local coordinate system coordinates, bushing rigidity and other information, see tables 1 and 2, and using Hypermesh software to establish a beam unit equivalent double-cross arm suspension system model as shown in figure 3;
TABLE 1 suspension hard point coordinates and local coordinate system direction coordinate parameter Table
TABLE 2 nonlinear stiffness parameter Table for bushings
102, calculating the rigidity of a real structural connection point of the suspension system, and adjusting the diameter of a beam unit of the beam unit equivalent suspension system model until the rigidity of the beam unit is consistent with the real structural rigidity of the suspension system to obtain the beam unit equivalent suspension system with the adjusted diameter, wherein the specific contents are as follows:
the control arm axial rigidity, the auxiliary frame connecting point rigidity and the steering knuckle connecting point rigidity are calculated, and the control arm axial rigidity calculation model, the auxiliary frame connecting point rigidity calculation model and the steering knuckle connecting point rigidity calculation model are shown in figures 4-9. And adjusting the beam unit diameter of the beam unit equivalent suspension system model until the beam unit rigidity is consistent with the real structural rigidity of the suspension system to obtain the beam unit equivalent suspension system with the adjusted diameter, as shown in fig. 10.
And 103, giving materials and section properties to the real structure of the suspension system, replacing the knuckle in the real structure of the suspension system with the materials and section properties, and deleting the knuckle equivalent beam unit in the beam unit equivalent suspension system with the adjusted diameter to obtain a final suspension system model.
As shown in fig. 11, the actual structure of the suspension system is given material and cross-sectional properties, and the knuckle in the actual structure of the suspension system given material and cross-sectional properties is replaced and the knuckle equivalent beam unit in the beam unit equivalent suspension system with the adjusted diameter is deleted to obtain the final suspension system model.
104, applying constraint conditions to the final suspension system model under the whole vehicle coordinate system, and calculating the strength durability performance of the knuckle under the load working condition, wherein the specific contents are as follows:
and applying constraint conditions to the final suspension system model under a whole vehicle coordinate system, wherein the whole vehicle coordinate system comprises: the whole car is directed from the head to the tail to be in an X-axis forward direction and in a vertical upward direction to be in a Z-axis forward direction, and a Y-axis forward direction is obtained through the X-axis forward direction and the Z-axis forward direction. The load conditions include: braking-type operating conditions and non-braking-type operating conditions.
Applying the constraint includes: the application constraint conditions of the braking working condition and the non-braking working condition are the same, the upper point of the shock absorber, the inner point of the upper control arm, the auxiliary frame and the vehicle body are all constrained, the X-axis, Y-axis and Z-axis degree-of-freedom constraint and the X-axis, Y-axis and Z-axis degree-of-freedom rotation direction constraint are applied under the whole vehicle coordinate system, and the ABAQUS software is adopted for calculation, wherein:
under the braking working condition, the brake disc transmits moment load to the knuckle through the brake caliper under the clamping action of the brake caliper, the braking force is F, the braking radius is R, the distance from the braking position to the wheel center is L, and the load F=fr/L acting on the braking position and the wheel center is equivalent through a couple of forces, as shown in fig. 12. And when the working conditions are not braking, the working condition loads are directly applied to the wheel center. The rigidity of the control arm connected with the knuckle and the rigidity of the auxiliary frame are identical to the actual rigidity, and meanwhile, the constraint applied when the knuckle is calculated in the suspension system is identical to the actual rigidity, so that the accuracy and the qualityof the boundary condition are ensured; the couple load is acted on the braking position and the wheel center through the couple equivalent principle, so that the braking load is accurately transmitted to the knuckle ear arm; except that the steering knuckle is a real structure, the rest structures are replaced by beam units, and excessive joints and units are not added, so that the calculation efficiency is ensured.
And 105, judging whether the deformation result of the final suspension system model is correct according to the strength durability of the knuckle under the corresponding load working condition.
Judging whether the deformation result of the final suspension system model is correct or not according to the strength durability of the knuckle under the corresponding load working condition:
if yes, obtaining a knuckle stress and equivalent plastic strain result in the final suspension system model;
if not, the steps 102-104 are repeated according to the actual condition adjustment parameters.
Example two
FIG. 13 is a block diagram illustrating a structural schematic of a knuckle strength durability modeling simulation apparatus, according to an example embodiment, the apparatus comprising:
the building module 210 is configured to obtain suspension system parameter table data, and build a beam unit equivalent suspension system model according to the suspension system parameter table data;
the adjusting module 220 is configured to calculate a rigidity of a real structural connection point of the suspension system, adjust a beam unit diameter of the beam unit equivalent suspension system model until the beam unit rigidity is consistent with the real structural rigidity of the suspension system, and obtain a beam unit equivalent suspension system with an adjusted diameter;
a replacing module 230, configured to assign material and section properties to a real structure of the suspension system, replace a knuckle in the real structure of the suspension system with the knuckle in the diameter-adjusted beam unit equivalent suspension system with the material and section properties, and obtain a final suspension system model;
a calculation module 240, configured to apply constraint conditions to the final suspension system model, and calculate strength durability of the knuckle under load conditions;
and the judging module 250 is used for judging whether the deformation result of the final suspension system model is correct according to the strength durability of the knuckle under the corresponding load working condition, and if so, acquiring the knuckle stress and equivalent plastic strain result in the final suspension system model.
Compared with a knuckle single-piece calculation method, the method has the advantages that through a beam unit rigidity equivalent method, the rigidity boundary of the knuckle suspension system calculation method is closer to the actual situation, and therefore simulation accuracy is improved. The simulation precision is further improved by restraining points directly connected with the vehicle body, such as an upper control arm inner point, a damper upper point, a subframe hard point and the like, consistent with the actual situation, and for braking working conditions, the braking moment is equivalently acted on the knuckle by a couple equivalent principle, and the rest of the knuckle is a beam unit except the actual structure, so that excessive joints and units are not added, and the calculation period is not increased.
Example III
Fig. 14 is a block diagram of a terminal provided in an embodiment of the present application, and the terminal may be a terminal in the above embodiment. The terminal 300 may be a portable mobile terminal such as: smart phone, tablet computer. The terminal 300 may also be referred to by other names of user equipment, portable terminals, etc.
In general, the terminal 300 includes: a processor 301 and a memory 302.
Processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor 301 may be implemented in at least one hardware form of DSP (Digital Signal Processing ), FPGA (Field-Programmable Gate Array, field programmable gate array), PLA (Programmable Logic Array ). The processor 301 may also include a main processor, which is a processor for processing data in an awake state, also called a CPU (Central Processing Unit ), and a coprocessor; a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 301 may integrate a GPU (Graphics Processing Unit, image processor) for rendering and drawing of content required to be displayed by the display screen. In some embodiments, the processor 301 may also include an AI (Artificial Intelligence ) processor for processing computing operations related to machine learning.
Memory 302 may include one or more computer-readable storage media, which may be tangible and non-transitory. Memory 302 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 302 is used to store at least one instruction for execution by processor 301 to implement a knuckle strength durability modeling simulation method provided herein.
In some embodiments, the terminal 300 may further optionally include: a peripheral interface 303, and at least one peripheral. Specifically, the peripheral device includes: at least one of radio frequency circuitry 304, touch screen 305, camera 306, audio circuitry 307, positioning component 308, and power supply 309.
The peripheral interface 303 may be used to connect at least one Input/Output (I/O) related peripheral to the processor 301 and the memory 302. In some embodiments, processor 301, memory 302, and peripheral interface 303 are integrated on the same chip or circuit board; in some other embodiments, either or both of the processor 301, the memory 302, and the peripheral interface 303 may be implemented on separate chips or circuit boards, which is not limited in this embodiment.
The Radio Frequency circuit 304 is configured to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuitry 304 communicates with a communication network and other communication devices via electromagnetic signals. The radio frequency circuit 304 converts an electrical signal into an electromagnetic signal for transmission, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 304 includes: antenna systems, RF transceivers, one or more amplifiers, tuners, oscillators, digital signal processors, codec chipsets, subscriber identity module cards, and so forth. The radio frequency circuitry 304 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocol includes, but is not limited to: the world wide web, metropolitan area networks, intranets, generation mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and/or WiFi (Wireless Fidelity ) networks. In some embodiments, the radio frequency circuitry 304 may also include NFC (Near Field Communication ) related circuitry, which is not limited in this application.
The touch display screen 305 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. The touch screen 305 also has the ability to collect touch signals at or above the surface of the touch screen 305. The touch signal may be input as a control signal to the processor 301 for processing. The touch screen 305 is used to provide virtual buttons and/or virtual keyboards, also known as soft buttons and/or soft keyboards. In some embodiments, the touch display 305 may be one, providing a front panel of the terminal 300; in other embodiments, the touch display 305 may be at least two, respectively disposed on different surfaces of the terminal 300 or in a folded design; in still other embodiments, the touch display 305 may be a flexible display disposed on a curved surface or a folded surface of the terminal 300. Even more, the touch display screen 305 may be arranged in an irregular pattern that is not rectangular, i.e., a shaped screen. The touch display 305 may be made of LCD (Liquid Crystal Display ), OLED (Organic Light-Emitting Diode) or other materials.
The camera assembly 306 is used to capture images or video. Optionally, the camera assembly 306 includes a front camera and a rear camera. In general, a front camera is used for realizing video call or self-photographing, and a rear camera is used for realizing photographing of pictures or videos. In some embodiments, the number of the rear cameras is at least two, and the rear cameras are any one of a main camera, a depth camera and a wide-angle camera, so as to realize fusion of the main camera and the depth camera to realize a background blurring function, and fusion of the main camera and the wide-angle camera to realize a panoramic shooting function and a Virtual Reality (VR) shooting function. In some embodiments, camera assembly 306 may also include a flash. The flash lamp can be a single-color temperature flash lamp or a double-color temperature flash lamp. The dual-color temperature flash lamp refers to a combination of a warm light flash lamp and a cold light flash lamp, and can be used for light compensation under different color temperatures.
Audio circuitry 307 is used to provide an audio interface between the user and terminal 300. The audio circuit 307 may include a microphone and a speaker. The microphone is used for collecting sound waves of users and environments, converting the sound waves into electric signals, and inputting the electric signals to the processor 301 for processing, or inputting the electric signals to the radio frequency circuit 304 for voice communication. For the purpose of stereo acquisition or noise reduction, a plurality of microphones may be respectively disposed at different portions of the terminal 300. The microphone may also be an array microphone or an omni-directional pickup microphone. The speaker is used to convert electrical signals from the processor 301 or the radio frequency circuit 304 into sound waves. The speaker may be a conventional thin film speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, not only the electric signal can be converted into a sound wave audible to humans, but also the electric signal can be converted into a sound wave inaudible to humans for ranging and other purposes. In some embodiments, the audio circuit 307 may also include a headphone jack.
The location component 308 is used to locate the current geographic location of the terminal 300 to enable navigation or LBS (Location Based Service, location-based services). The positioning component 308 may be a positioning component based on the United states GPS (Global Positioning System ), the Beidou system of China, or the Galileo system of Russia.
The power supply 309 is used to power the various components in the terminal 300. The power source 309 may be alternating current, direct current, disposable or rechargeable. When the power source 309 comprises a rechargeable battery, the rechargeable battery may be a wired rechargeable battery or a wireless rechargeable battery. The wired rechargeable battery is a battery charged through a wired line, and the wireless rechargeable battery is a battery charged through a wireless coil. The rechargeable battery may also be used to support fast charge technology.
In some embodiments, the terminal 300 further includes one or more sensors 310. The one or more sensors 310 include, but are not limited to: acceleration sensor 311, gyroscope sensor 312, pressure sensor 313, fingerprint sensor 314, optical sensor 315, and proximity sensor 316.
The acceleration sensor 311 can detect the magnitudes of accelerations on three coordinate axes of the coordinate system established with the terminal 300. For example, the acceleration sensor 311 may be used to detect components of gravitational acceleration on three coordinate axes. The processor 301 may control the touch display screen 305 to display a user interface in a landscape view or a portrait view according to the gravitational acceleration signal acquired by the acceleration sensor 311. The acceleration sensor 311 may also be used for the acquisition of motion data of a game or a user.
The gyro sensor 312 may detect a body direction and a rotation angle of the terminal 300, and the gyro sensor 312 may collect 3D (three-dimensional) motion of the user to the terminal 300 in cooperation with the acceleration sensor 311. The processor 301 may implement the following functions according to the data collected by the gyro sensor 312: motion sensing (e.g., changing UI according to a tilting operation by a user), image stabilization at shooting, game control, and inertial navigation.
The pressure sensor 313 may be disposed at a side frame of the terminal 300 and/or at a lower layer of the touch screen 305. When the pressure sensor 313 is provided at the side frame of the terminal 300, a grip signal of the terminal 300 by a user may be detected, and left-right hand recognition or shortcut operation may be performed according to the grip signal. When the pressure sensor 313 is disposed at the lower layer of the touch screen 305, control of the operability control on the UI interface can be achieved according to the pressure operation of the user on the touch screen 305. The operability controls include at least one of a button control, a scroll bar control, an icon control, and a menu control.
The fingerprint sensor 314 is used to collect a fingerprint of a user to identify the identity of the user based on the collected fingerprint. Upon recognizing that the user's identity is a trusted identity, the user is authorized by the processor 301 to perform relevant sensitive operations including unlocking the screen, viewing encrypted information, downloading software, paying for and changing settings, etc. The fingerprint sensor 314 may be provided on the front, back or side of the terminal 300. When a physical key or a manufacturer Logo is provided on the terminal 300, the fingerprint sensor 314 may be integrated with the physical key or the manufacturer Logo.
The optical sensor 315 is used to collect the ambient light intensity. In one embodiment, processor 301 may control the display brightness of touch screen 305 based on the intensity of ambient light collected by optical sensor 315. Specifically, when the intensity of the ambient light is high, the display brightness of the touch display screen 305 is turned up; when the ambient light intensity is low, the display brightness of the touch display screen 305 is turned down. In another embodiment, the processor 301 may also dynamically adjust the shooting parameters of the camera assembly 306 according to the ambient light intensity collected by the optical sensor 315.
A proximity sensor 316, also referred to as a distance sensor, is typically disposed on the front face of the terminal 300. The proximity sensor 316 is used to collect the distance between the user and the front of the terminal 300. In one embodiment, when the proximity sensor 316 detects a gradual decrease in the distance between the user and the front face of the terminal 300, the processor 301 controls the touch screen 305 to switch from the on-screen state to the off-screen state; when the proximity sensor 316 detects that the distance between the user and the front surface of the terminal 300 gradually increases, the processor 301 controls the touch display screen 305 to switch from the off-screen state to the on-screen state.
Those skilled in the art will appreciate that the structure shown in fig. 14 is not limiting and that more or fewer components than shown may be included or certain components may be combined or a different arrangement of components may be employed.
Example IV
In an exemplary embodiment, a computer readable storage medium is also provided, on which a computer program is stored which, when being executed by a processor, implements a knuckle strength durability modeling simulation method as provided by all inventive embodiments of the present application.
Any combination of one or more computer readable media may be employed. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
Example five
In an exemplary embodiment, an application program product is also provided that includes one or more instructions that are executable by the processor 301 of the above apparatus to perform a knuckle strength durability modeling simulation method as described above.
Although embodiments of the invention have been disclosed above, they are not limited to the use listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. Therefore, the invention is not to be limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (10)
1. The knuckle strength durability modeling simulation method is characterized by comprising the following steps of:
acquiring suspension system parameter table data, and establishing a beam unit equivalent suspension system model according to the suspension system parameter table data;
calculating the rigidity of a real structural connection point of the suspension system, and adjusting the diameter of a beam unit of the beam unit equivalent suspension system model until the rigidity of the beam unit is consistent with the real structural rigidity of the suspension system to obtain the beam unit equivalent suspension system with the adjusted diameter;
giving materials and section properties to the real structure of the suspension system, replacing the knuckle in the real structure of the suspension system with the materials and section properties, and deleting the knuckle equivalent beam unit in the beam unit equivalent suspension system with the adjusted diameter to obtain a final suspension system model;
applying constraint conditions to the final suspension system model under a whole vehicle coordinate system, and calculating the strength durability of the knuckle under a load working condition;
judging whether the deformation result of the final suspension system model is correct according to the strength durability of the knuckle under the corresponding load working condition, and if so, acquiring the knuckle stress and equivalent plastic strain result in the final suspension system model.
2. The method of claim 1, wherein the suspension system parameter table data comprises at least: suspension system hard point coordinates, bushings, and spring rate.
3. A method of modeling and simulating the strength and durability of a steering knuckle according to claim 1 or 2, wherein said calculating the true structural joint stiffness of a suspension system comprises: and calculating the axial rigidity of the control arm, the rigidity of the auxiliary frame connecting point and the rigidity of the steering knuckle connecting point.
4. A knuckle strength durability modeling simulation method according to claim 3, wherein the whole vehicle coordinate system comprises: the whole car is directed from the head to the tail to be in an X-axis forward direction and in a vertical upward direction to be in a Z-axis forward direction, and a Y-axis forward direction is obtained through the X-axis forward direction and the Z-axis forward direction.
5. The method of modeling and simulating the strength and durability of a steering knuckle of claim 4, wherein the load conditions include: braking-type operating conditions and non-braking-type operating conditions.
6. The method of claim 5, wherein said applying constraints comprises:
the application constraint conditions of the braking working condition and the non-braking working condition are the same, the upper point of the shock absorber, the inner point of the upper control arm, the connection point of the auxiliary frame and the vehicle body are all constrained, and the degree of freedom constraints of an X axis, a Y axis and a Z axis and the degree of freedom rotation direction constraints of the X axis, the Y axis and the Z axis are applied under the whole vehicle coordinate system, wherein:
when the brake is in the working condition, the brake disc transmits moment load to the knuckle through the brake caliper under the clamping action of the brake caliper;
and when the non-braking working condition is adopted, the working condition loads are directly applied to the wheel center.
7. The method for modeling and simulating the strength and durability of a steering knuckle according to claim 6, wherein the calculated strength and durability of the steering knuckle under load conditions is calculated by ABAQUS software.
8. A knuckle strength durability modeling simulation apparatus, comprising:
the building module is used for obtaining suspension system parameter table data and building a beam unit equivalent suspension system model according to the suspension system parameter table data;
the adjusting module is used for calculating the rigidity of a real structural connection point of the suspension system, and adjusting the diameter of the beam unit equivalent suspension system model until the rigidity of the beam unit is consistent with the real structural rigidity of the suspension system to obtain the beam unit equivalent suspension system with the adjusted diameter;
the replacing module is used for endowing the real structure of the suspension system with material and section properties, and replacing the knuckle in the real structure of the suspension system with the material and section properties with the knuckle equivalent beam unit in the beam unit equivalent suspension system with the diameter adjusted to obtain a final suspension system model;
the calculation module is used for applying constraint conditions to the final suspension system model and calculating the strength durability of the knuckle under the load working condition;
and the judging module is used for judging whether the deformation result of the final suspension system model is correct according to the strength durability of the knuckle under the corresponding load working condition, and if so, acquiring the knuckle stress and equivalent plastic strain result in the final suspension system model.
9. A terminal, comprising:
one or more processors;
a memory for storing the one or more processor-executable instructions;
wherein the one or more processors are configured to:
a knuckle strength durability modeling simulation method according to any one of claims 1 to 7 is performed.
10. A non-transitory computer readable storage medium, characterized in that instructions in the storage medium, when executed by a processor of a terminal, enable the terminal to perform a knuckle strength durability modeling simulation method according to any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310486279.8A CN116522645A (en) | 2023-04-28 | 2023-04-28 | Knuckle strength endurance modeling simulation method, device, terminal and medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310486279.8A CN116522645A (en) | 2023-04-28 | 2023-04-28 | Knuckle strength endurance modeling simulation method, device, terminal and medium |
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| CN116522645A true CN116522645A (en) | 2023-08-01 |
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