CN113591213A - Durability analysis method for novel door lock body of light commercial vehicle - Google Patents
Durability analysis method for novel door lock body of light commercial vehicle Download PDFInfo
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- G—PHYSICS
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Abstract
The invention discloses a durability analysis method for a novel door lock body of a light commercial vehicle, which comprises the following steps: 1) obtaining a model of a door lock body mechanism to be analyzed, and theoretically judging whether the door lock mechanism meets locking and locking functions; 2) establishing a three-dimensional model of a transmission mechanism of a door lock body; 3) establishing a motion simulation model of the lock body mechanism, and judging whether the door lock mechanism meets the locking and locking functions or not through the motion simulation model; 4) performing CAE simulation pretreatment; 5) CAE simulation solving and post-processing; 6) importing the calculated stress condition result file of the lock body model into a durable simulation module, building a fatigue analysis process, and calculating the service life; 7) and evaluating the fatigue strength of the door lock body according to the simulation result. The method can effectively improve the design efficiency of the automobile door lock body.
Description
Technical Field
The invention relates to an automobile door lock body, in particular to a durability analysis method for a novel door lock body of a light commercial vehicle.
Background
The automobile door lock is a special part on an automobile, which integrates safety, decoration and manufacturability into a whole. At present, coordination and development of a door lock and a whole automobile are very important in a plurality of automobile countries in the world such as America, Japan, Europe and the like. Automobile parts are important components of the automobile market, and door locks have been developed to a great extent as key parts of automobiles. As one of the most critical performance components of an automobile door system, an automobile door lock can realize vehicle theft prevention and door locking, and meanwhile, as a vital component in an integral automobile accessory, the performance of a door lock mechanism directly influences the personal safety of passengers.
Light commercial vehicles are generally referred to as load-carrying vehicles having at least four wheels and a maximum total factory weight of not more than 3.5 t. The novel door lock body is a novel mechanism integrating a door lock locking mechanism and a locking mechanism together. Durability refers to the ability of a product to be used for extended periods of time without failure.
At present, the light commercial vehicle gradually starts to use the integrated door lock, the locking mechanism and the locking mechanism are integrated together, and the installation volume and the quality of the lock body are greatly reduced. In the domestic method for verifying the durability of the automobile door lock body, the fatigue strength of the automobile door lock body is verified to meet the requirement by performing an opening and closing durability test after assembly. The automobile door lock has the disadvantages that the development door lock period is increased, once the door lock body structure is verified to be not satisfactory through tests, the door lock body structure needs to be redesigned, the development period is prolonged, and whether the fatigue strength meets the requirements or not needs to be verified through tests every time an automobile door lock body is designed, so that the efficiency is low.
Disclosure of Invention
The invention aims to solve the technical problem of providing a durability analysis method for a novel door lock body of a light commercial vehicle, aiming at the defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a durability analysis method for a novel door lock body of a light commercial vehicle comprises the following steps:
1) acquiring a three-dimensional model of a door lock and lock body mechanism to be analyzed, building a kinematic chain of the door lock and lock body mechanism according to the model according to functions, and deducing a kinematics and a kinetic equation of the lock body mechanism; judging whether the door lock mechanism meets the locking and locking functions theoretically according to the kinematics and the kinetic equation of the lock body mechanism;
2) establishing a three-dimensional model of the transmission mechanism of the door lock body according to the three-dimensional model in the step 1), and setting the matching relation of all components in the transmission mechanism;
3) importing the three-dimensional model of the member established in the step 2) into simulation software to obtain a motion simulation model of the lock body mechanism, and judging whether the lock mechanism meets locking and locking functions or not through the motion simulation model;
4) CAE simulation pretreatment: acquiring the load condition of each component in a motion simulation model of the lock body mechanism through a kinetic equation, introducing the motion simulation model of the door lock into finite element analysis software, carrying out grid division, and setting material parameters, contact relation, kinematic pair form, load and boundary conditions;
5) CAE simulation solving and post-processing: calculating the stress condition of the door lock body model after pretreatment through finite element analysis software, and carrying out simulation analysis aiming at different kinematic chains to obtain simulation data of load change of each component in the motion process;
6) verifying the simulation data of the load change of each component by using a kinetic equation, and if the simulation data do not accord with the stress relation derived theoretically, optimizing boundary conditions in the stress simulation pretreatment until the stress relation derived theoretically is met;
7) importing the calculated stress condition result file of the lock body model into a durable simulation module, building a fatigue analysis process, and calculating the service life;
8) and (3) reasonably evaluating the door lock body according to the simulation result, if the fatigue strength of the result does not meet the requirement, performing material optimization and load optimization, and then turning to the step 1) until the simulation result meets the actual requirement.
According to the scheme, the step 2) of establishing the three-dimensional model of the transmission mechanism of the door lock body is to establish the three-dimensional model of components including the clamping plate, the clamping jaws, the shell, the bottom plate, the opening connecting rod, the locking gear, the inner locking arm and the outer locking arm.
According to the scheme, in the step 3), whether the door lock mechanism meets the locking and locking functions is judged through the motion simulation model, the motion simulation model is simplified, and the motion simulation model is decomposed into the following motion chains: the manual locking kinematic chain, the electric control locking kinematic chain, the key locking kinematic chain, the outer handle opening kinematic chain and the inner handle opening kinematic chain are subjected to simulation analysis aiming at different kinematic chains.
According to the scheme, the step 4) of simplifying the component model before grid division comprises eliminating fillets and simplifying complex curved surfaces.
According to the scheme, the material parameters, the contact relationship, the kinematic pair form, the load and the boundary conditions set in the step 4) are specifically as follows:
the material parameters comprise the density, Poisson's ratio, elastic modulus, fatigue curve, yield strength and tensile strength of the material;
the contact relation is set according to analysis of a kinematic chain, and comprises frictionless contact, frictional contact and fixed constraint;
the kinematic pair comprises a revolute pair, a sliding pair, gear transmission and a cam mechanism;
the load setting comprises the setting of motor input torque, torsional spring moment and acting force and resistance between components;
the boundary condition settings comprise load conditions, displacement constraints and inertia conditions.
The invention has the following beneficial effects:
1. the method can save the process of repeatedly manufacturing sample pieces for testing through durability simulation analysis, and can reduce the design period and the design cost of the automobile door lock body.
2. The method can predict the service life of the automobile door lock body according to the simulation result through durability simulation analysis, and optimally designs the structure of the automobile door lock body according to the requirement level.
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The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a flow chart of a method of an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, a method for analyzing durability of a novel door lock body of a light commercial vehicle comprises the following steps:
1) acquiring a three-dimensional model of a door lock and lock body mechanism to be analyzed, building a kinematic chain of the door lock and lock body mechanism according to the model according to functions, and deducing a kinematics and a kinetic equation of the lock body mechanism; judging whether the door lock mechanism meets the locking and locking functions theoretically according to the kinematics and the kinetic equation of the lock body mechanism; converting the obtained three-dimensional model into a theoretical model in the step 1), wherein the theoretical model is a complete door lock body model and comprises a door lock body, and all parts of a lock catch and a pull wire;
2) establishing a model of the transmission mechanism of the door lock body according to the three-dimensional model in the step 1): establishing a three-dimensional model comprising a clamping plate, a clamping jaw, a shell, a bottom plate, an opening connecting rod, a locking gear, an inner locking arm, an outer locking arm and other components, and setting a matching relation; only contains a transmission mechanism and a component needing to consider durability;
3) and (2) importing the three-dimensional model of the component established in the step 2) into simulation software to obtain a motion simulation model of the lock body mechanism, decomposing the motion simulation model of the complex lock body mechanism into a plurality of motion chains, namely a manual locking motion chain, an electric control locking motion chain, a key locking motion chain, an external handle opening motion chain and an internal handle opening motion chain, performing motion simulation analysis aiming at different motion chains to simplify the motion simulation model, obtaining the motion conditions of each motion chain of the lock body, and finally proving that the lock body mechanism can meet the locking and locking functions from the perspective of simulation analysis.
4) CAE simulation pretreatment: importing a door lock body model into Hypermesh or Ansa finite element analysis software for grid division, and then importing the door lock body model into Ansys Workbench to set material parameters, contact relationship, kinematic pair form, load and boundary conditions; simplifying the model before mesh division, such as eliminating fillets, simplifying complex curved surfaces and the like;
the method comprises the following specific steps:
the material parameters comprise the density, Poisson's ratio, elastic modulus, fatigue curve, yield strength and tensile strength of the material;
the contact relation is set according to analysis of a kinematic chain, and comprises frictionless contact, frictional contact and fixed constraint;
the kinematic pair comprises a revolute pair, a sliding pair, gear transmission and a cam mechanism;
the load setting comprises the setting of motor input torque, torsional spring moment and acting force and resistance between components;
the boundary condition settings comprise load conditions, displacement constraints and inertia conditions.
5) CAE simulation solving and post-processing: calculating the stress condition of the lock body model through finite element analysis software, and acquiring simulation data of load change of each component in the motion process of the lock body model;
6) importing the stress condition result file of the calculated lock body model into an nCode durable simulation module, and constructing a fatigue analysis process, wherein if the material fatigue curve is unknown, a rough material fatigue curve is obtained through a fatigue curve estimation function of simulation software, and the estimated curve is corrected through a correction function; then calculating the service life;
7) and (3) reasonably evaluating the door lock body according to the simulation result, if the fatigue strength of the result is unreasonable, optimizing the material, optimizing the load through structural adjustment, and turning to the step 1) until the simulation result meets the actual requirement. Load optimization such as changes in worm and gear related parameters, changes in bar length and thickness, or other structural adjustments.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (6)
1. A durability analysis method for a novel door lock body of a light commercial vehicle is characterized by comprising the following steps:
1) acquiring a three-dimensional model of a door lock and lock body mechanism to be analyzed, and deducing a kinematics and a kinetic equation of the lock body mechanism according to the model; judging whether the door lock mechanism meets the locking and locking functions theoretically according to the kinematics and the kinetic equation of the lock body mechanism;
2) establishing a three-dimensional model of the transmission mechanism of the door lock body according to the three-dimensional model in the step 1), and setting the matching relation of all components in the transmission mechanism;
3) importing the three-dimensional model of the member established in the step 2) into simulation software to obtain a motion simulation model of the lock body mechanism, and judging whether the lock mechanism meets locking and locking functions or not through the motion simulation model;
4) CAE simulation pretreatment: acquiring the load condition of each component in a motion simulation model of the lock body mechanism through a kinetic equation, introducing the motion simulation model of the door lock into finite element analysis software, carrying out grid division, and setting material parameters, contact relation, kinematic pair form, load and boundary conditions;
5) CAE simulation solving and post-processing: calculating the stress condition of the door lock body model after pretreatment through finite element analysis software, and carrying out simulation analysis aiming at different kinematic chains to obtain simulation data of load change of each component in the motion process;
7) importing the calculated stress condition result file of the lock body model into a durable simulation module, building a fatigue analysis process, and calculating the service life;
8) and (3) evaluating the fatigue strength of the door lock body according to the simulation result, if the fatigue strength does not meet the requirement, performing material optimization and load optimization, and then turning to the step 1) until the simulation result meets the actual requirement.
2. The durability analysis method for the novel door lock body of the light commercial vehicle as claimed in claim 1, wherein the three-dimensional model in the step 1) is a complete three-dimensional model of the door lock body, and comprises all parts of the door lock body.
3. The method for analyzing the durability of the novel door lock body of the light commercial vehicle as claimed in claim 1, wherein the step 2) of establishing the three-dimensional model of the transmission mechanism of the door lock body is to establish a three-dimensional model of components including a clamping plate, a clamping jaw, a shell, a bottom plate, an opening connecting rod, a locking gear, an inner locking arm and an outer locking arm.
4. The durability analysis method for the novel lock body of the light commercial vehicle door lock is characterized in that in the step 3), whether the lock mechanism meets the locking and locking functions is judged through the motion simulation model, the motion simulation model is simplified, and the motion simulation model is decomposed into a plurality of following motion chains: the manual locking kinematic chain, the electric control locking kinematic chain, the key locking kinematic chain, the outer handle opening kinematic chain and the inner handle opening kinematic chain are subjected to simulation analysis aiming at different kinematic chains.
5. The durability analysis method for the novel lock body of the light commercial vehicle door lock is characterized in that the step 4) of grid division comprises simplification of a component model, wherein the simplification comprises the elimination of round corners and the simplification of a complex curved surface.
6. The durability analysis method for the novel lock body of the light commercial vehicle door lock is characterized in that the material parameters, the contact relationship, the kinematic pair form, the load and the boundary conditions are set in the step 4) as follows:
the material parameters comprise the density, Poisson's ratio, elastic modulus, fatigue curve, yield strength and tensile strength of the material;
the contact relation is set according to analysis of a kinematic chain, and comprises frictionless contact, frictional contact and fixed constraint;
the kinematic pair comprises a revolute pair, a sliding pair, gear transmission and a cam mechanism;
the load setting comprises the setting of motor input torque, torsional spring moment and acting force and resistance between components; the boundary condition settings comprise load conditions, displacement constraints and inertia conditions.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110800953.6A CN113591213B (en) | 2021-07-15 | 2021-07-15 | Durability analysis method for novel door lock body of light commercial vehicle |
| PCT/CN2021/109035 WO2023284016A1 (en) | 2021-07-15 | 2021-07-28 | Method for analyzing durability of novel door lock body of light commercial vehicle |
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| CN202110800953.6A CN113591213B (en) | 2021-07-15 | 2021-07-15 | Durability analysis method for novel door lock body of light commercial vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116502342B (en) * | 2023-06-28 | 2023-09-01 | 江铃汽车股份有限公司 | Virtual simulation-based automobile engine hood fatigue endurance life prediction method and system |
| CN116910924B (en) * | 2023-09-13 | 2024-01-19 | 天津龙创世纪汽车设计有限公司 | Quick analysis method based on strength of car door trim card seat |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010010576A (en) * | 1999-07-21 | 2001-02-15 | 정몽규 | Method for durability evaluation analysis of body |
| CN102201016A (en) * | 2010-03-22 | 2011-09-28 | 上海通用汽车有限公司 | Method for modeling and simulating door lock system based on vehicle crash safety |
| CN104236918A (en) * | 2014-08-29 | 2014-12-24 | 北京新能源汽车股份有限公司 | Endurance test device and method for automobile door lock |
| CN210981742U (en) * | 2019-10-10 | 2020-07-10 | 广州汽车集团股份有限公司 | Dynamic load testing device for vehicle door lock |
| CN112417608A (en) * | 2020-12-11 | 2021-02-26 | 一汽-大众汽车有限公司 | Vehicle door model construction method and system, electronic device and storage medium |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102521434B (en) * | 2011-11-29 | 2014-04-09 | 南京康尼机电股份有限公司 | Dynamic simulation analytical method for locking device of rail traffic vehicle door system |
| JP2017054203A (en) * | 2015-09-07 | 2017-03-16 | エレメンタルデザイン＆コンサルティング株式会社 | Structural design support device and structural design support program |
| CN109697311A (en) * | 2018-12-10 | 2019-04-30 | 山东国金汽车制造有限公司 | A kind of automobile side-door opening and closing endurance analysis method based on finite element |
| CN112613147B (en) * | 2020-12-29 | 2024-04-16 | 珠海格力智能装备有限公司 | Simulation analysis method of mold locking mechanism and mold locking mechanism |
-
2021
- 2021-07-15 CN CN202110800953.6A patent/CN113591213B/en active Active
- 2021-07-28 WO PCT/CN2021/109035 patent/WO2023284016A1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010010576A (en) * | 1999-07-21 | 2001-02-15 | 정몽규 | Method for durability evaluation analysis of body |
| CN102201016A (en) * | 2010-03-22 | 2011-09-28 | 上海通用汽车有限公司 | Method for modeling and simulating door lock system based on vehicle crash safety |
| CN104236918A (en) * | 2014-08-29 | 2014-12-24 | 北京新能源汽车股份有限公司 | Endurance test device and method for automobile door lock |
| CN210981742U (en) * | 2019-10-10 | 2020-07-10 | 广州汽车集团股份有限公司 | Dynamic load testing device for vehicle door lock |
| CN112417608A (en) * | 2020-12-11 | 2021-02-26 | 一汽-大众汽车有限公司 | Vehicle door model construction method and system, electronic device and storage medium |
Non-Patent Citations (1)
| Title |
|---|
| 乔淑平;徐成民;: "车门开闭耐久仿真分析研究及优化", 汽车实用技术, no. 05, pages 143 - 147 * |
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| WO2023284016A1 (en) | 2023-01-19 |
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