CN113899338A - Brake disc thermal deformation testing and CAE simulation method - Google Patents
Brake disc thermal deformation testing and CAE simulation method Download PDFInfo
- Publication number
- CN113899338A CN113899338A CN202111029754.6A CN202111029754A CN113899338A CN 113899338 A CN113899338 A CN 113899338A CN 202111029754 A CN202111029754 A CN 202111029754A CN 113899338 A CN113899338 A CN 113899338A
- Authority
- CN
- China
- Prior art keywords
- brake disc
- thermal deformation
- brake
- test
- testing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
Abstract
The invention provides a method for testing the thermal deformation of a brake disc and CAE (computer aided engineering) simulation, which can find the thermal deformation of the brake disc in a development stage of an automobile instead of a use stage, thereby being capable of modifying as early as possible, shortening the development period, improving the development efficiency and avoiding the brake shake caused by the thermal deformation of the brake disc in the use process of the automobile. The method for testing the thermal deformation of the brake disc comprises the following steps: A. pretreatment: firstly, marking a measuring point on a brake disc, installing a non-contact displacement sensor at a position of a brake caliper assembly corresponding to the measuring point, and then installing the brake disc and the brake caliper assembly on an inertia test bed; B. carrying out running-in tests on the brake disc for a preset number of times; C. after the running-in test is finished, cooling the brake disc to room temperature, and then carrying out a brake disc thermal deformation test; D. and measuring the position change condition of each measuring point on the brake disc by using the non-contact displacement sensor to obtain the thermal deformation data of the brake disc.
Description
Technical Field
The invention belongs to the technical field of automobile testing, and particularly relates to a method for testing thermal deformation of a brake disc in a brake and CAE (computer aided engineering) simulation.
Background
The brake jitter is one of important indexes of the performance of the whole automobile, the quality of an automobile brand is directly influenced, and various large host factories are dedicated to how to avoid the brake jitter. The brake judder is a factor involved in a large number of factors, and is not only related to each component of the brake but also related to systems such as a suspension and a steering system, and the thermal deformation of the brake disc is one of the causes. At present, no reasonable test program is provided in the industry to verify the thermal deformation of the brake disc, so that after a new vehicle comes into the market, the phenomenon of brake shaking of the whole vehicle caused by excessive thermal deformation of the brake disc cannot be avoided, and customers complain about the situation.
Disclosure of Invention
The invention aims to provide a brake disc thermal deformation test and CAE simulation method, which can find the thermal deformation of a brake disc in a development stage of an automobile instead of a use stage, thereby being capable of modifying as early as possible, shortening the development period, improving the development efficiency, avoiding the brake shake caused by the thermal deformation of the brake disc in the use process of the automobile, reducing the after-sale cost, ensuring the product quality and improving the product competitiveness.
The method for testing the thermal deformation of the brake disc comprises the following steps:
A. pretreatment: firstly, marking a measuring point on a brake disc, installing a non-contact displacement sensor at a position of a brake caliper assembly corresponding to the measuring point, and then installing the brake disc and the brake caliper assembly on an inertia test bed;
B. carrying out running-in tests on the brake disc for a preset number of times;
C. after the running-in test is finished, cooling the brake disc to room temperature, and then carrying out a brake disc thermal deformation test;
D. and measuring the position change condition of each measuring point on the brake disc by using the non-contact displacement sensor to obtain the thermal deformation data of the brake disc.
Further, for the temperature variation of convenient monitoring brake disc, provide temperature parameter for future CAE emulation, utilize the temperature sensor who installs on the brake disc to measure the temperature of brake disc in the test process, temperature sensor is 0.2 ~ 0.8mm apart from the working face of brake disc, and this temperature sensor can be the thermocouple.
Specifically, the method comprises the following steps:
there are two groups of measurement points, which are respectively: inner side measuring points: the inner edges of the friction surfaces on the two sides of the brake disc are respectively positioned at the positions 8-12 mm outwards; outer side measurement points: the outer edges of the friction surfaces on the two sides of the brake disc are respectively positioned at the inward positions of 8-12 mm. And the thermal deformation data of the brake disc at the measuring point can be obtained by detecting the position change of the measuring point before and after the test.
The running-in test method in the step B is as follows: the initial speed is 70-90 km/h, the speed is reduced to be less than 20km/h under the braking conditions that the deceleration is 0.27-0.35G and the pressure rising rate of a brake master cylinder is 3000-4000 kPa/s, and the cooling air speed in the test process is 40-60 km/h.
The method for the brake disc heat deformation test comprises the following steps: the inertia of the front and rear wheel test is set according to the following requirements: front wheels: IG =0.5 × β M × R2; rear wheels: IG =0.5 (1-beta) M R2, wherein beta is a front and rear braking force distribution coefficient, M is the full load mass of the whole vehicle, and R is the rolling radius of the wheels; during the test, the vehicle speed is reduced to zero from the preset initial vehicle speed at the preset deceleration through braking.
The CAE simulation method for the thermal deformation of the brake disc comprises the following steps:
a: firstly, establishing a CAE simulation model, and importing the material and the size parameters of a brake disc into the CAE simulation model;
b: simulating by using the CAE simulation model to obtain simulation data of the thermal deformation of the brake disc; obtaining measured data of the thermal deformation of the brake disc by using the test method of the thermal deformation of the brake disc;
c: adjusting thermal parameters of a CAE simulation model according to the difference value of the measured data and the simulation data;
d: and repeatedly executing the step B, C until the difference value between the simulation data and the measured data is smaller than a preset value, and obtaining a final CAE simulation model.
Of course, in the simulation and the actual test of the brake disc, the parameters of the total mass of the adopted full load and the brake proportionality coefficient are consistent, and are not described again here.
By adopting the method for testing the thermal deformation of the brake disc, the thermal deformation condition of the brake disc can be obtained in the test process, so that the problem that the thermal deformation exceeds the standard in the actual use process of the brake disc is avoided; by adopting the CAE simulation method for the thermal deformation of the brake disc, the thermal deformation simulation analysis of the brake disc and the bench test can be effectively associated, so that the CAE simulation accuracy is improved, and the design change caused by the fact that the thermal deformation of the brake disc sample cannot meet the requirements of the bench test after the tool sample is developed is avoided. In conclusion, the invention can shorten the development period, improve the development efficiency, reduce the development cost, ensure the product quality and improve the product competitiveness while avoiding the brake shake of the whole vehicle caused by the thermal deformation of the brake disc.
Drawings
FIG. 1 is a schematic illustration of the thermal deformation of a brake disc.
Detailed Description
The following describes embodiments of the present invention, such as shapes and structures of respective members, mutual positions and connection relationships between respective portions, and actions and operation principles of the respective portions, in further detail, with reference to the accompanying drawings.
Example 1:
the embodiment provides a method for testing thermal deformation of a brake disc, which specifically comprises the following steps:
A. pretreatment: firstly, marking a measuring point on a brake disc, installing a displacement sensor at a position of a brake caliper assembly corresponding to the measuring point, and then installing the brake disc and the brake caliper assembly on an inertia test bed; there are two groups of measurement points, which are respectively: inner side measuring points: the inner edges of the friction surfaces on the two sides of the brake disc are respectively positioned at the positions which are 10mm outwards; outer side measurement points: the outer edges of the friction surfaces on the two sides of the brake disc are respectively positioned at the positions which are 10mm inward;
B. the brake disc was subjected to a running-in test 200 times, the running-in test method being as follows: the initial speed is 80km/h, the speed is reduced to be less than 20km/h under the braking conditions that the deceleration is 0.31G and the pressure rising rate of a brake master cylinder is 3500kPa/s, and the cooling air speed in the test process is 50 km/h;
C. after the running-in test is finished, cooling the brake disc to room temperature, and then carrying out a brake disc thermal deformation test, wherein the method for the brake disc thermal deformation test comprises the following steps: the inertia of the front and rear wheel test is set according to the following requirements: front wheels: IG =0.5 × β M × R2; rear wheels: IG =0.5 (1-beta) M R2, wherein beta is a front and rear braking force distribution coefficient, M is the full load mass of the whole vehicle, and R is the rolling radius of the wheels; in the test, the vehicle speed is reduced to zero from a predetermined initial vehicle speed at a predetermined deceleration by braking, and in the embodiment, the initial vehicle speed: 180km/h, deceleration: 0.5g, initial temperature 23 ℃, braking times: 1 time;
D. and measuring the position change condition of each measuring point on the brake disc by using the non-contact displacement sensor to obtain the thermal deformation data of the brake disc.
As shown in fig. 1, the deformation value of the inner friction plate of the brake disc is C1-C2, wherein C1 is the position difference of the outer measurement point C1 on the inner friction plate before and after the test, and C2 is the position difference of the inner measurement point C2 on the inner friction plate before and after the test; the deformation value of the outer friction plate of the brake disc is C3-C4, wherein C3 is the position difference of an outer measuring point C3 on the friction plate of the outer side face before and after the test, and C4 is the position difference of an inner measuring point C4 on the friction plate of the outer side face before and after the test.
For the temperature variation of convenient monitoring brake disc, provide temperature parameter for the CAE emulation, utilize the temperature sensor who installs on the brake caliper disc to measure the temperature of brake disc in the test process, temperature sensor is 0.5mm apart from the working face of brake disc.
Example 2:
the embodiment provides a CAE simulation method for thermal deformation of a brake disc, which specifically includes the following steps:
a: firstly, establishing a CAE simulation model by using simulation software Abaqus or ansys workbench, and introducing the material and the size parameters of a brake disc into the CAE simulation model;
b: simulating by using the CAE simulation model to obtain simulation data of the thermal deformation of the brake disc; and the measured data of the thermal deformation of the brake disc is obtained by using the test method of the thermal deformation of the brake disc in the embodiment 1;
c: adjusting thermal parameters of a CAE simulation model according to the difference value of the measured data and the simulation data;
d: and repeatedly executing the step B, C until the difference value between the simulation data and the measured data is smaller than a preset value, and obtaining a final CAE simulation model.
E. Changing the size parameters of the brake disc of the CAE simulation model, and repeatedly executing the steps A to D to obtain the universal CAE simulation model made of the same material and in different sizes.
Of course, in the simulation and the actual test of the brake disc, the parameters of the total mass of the adopted full load and the brake proportionality coefficient are consistent, and are not described again here.
The invention has been described in connection with the accompanying drawings, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of the components set forth in the following description, as long as the invention is capable of being practiced without modification in any way whatsoever, and is capable of other applications without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A method for testing thermal deformation of a brake disc, comprising the steps of:
A. pretreatment: firstly, marking a measuring point on a brake disc, installing a non-contact displacement sensor at a position of a brake caliper assembly corresponding to the measuring point, and then installing the brake disc and the brake caliper assembly on an inertia test bed;
B. carrying out running-in tests on the brake disc for a preset number of times;
C. after the running-in test is finished, cooling the brake disc to room temperature, and then carrying out a brake disc thermal deformation test;
D. and measuring the position change condition of each measuring point on the brake disc by using the non-contact displacement sensor to obtain the thermal deformation data of the brake disc.
2. A method for testing the thermal deformation of brake discs according to claim 1, characterized in that there are two groups of measurement points, respectively: inner side measuring points: the inner edges of the friction surfaces on the two sides of the brake disc are respectively positioned at the positions 8-12 mm outwards; outer side measurement points: the outer edges of the friction surfaces on the two sides of the brake disc are respectively positioned at the inward positions of 8-12 mm.
3. The method for testing the thermal deformation of the brake disc as claimed in claim 1, wherein the temperature of the brake disc is measured by a temperature sensor mounted on the brake disc during the test, and the temperature sensor is 0.2-0.8 mm away from the working surface of the brake disc.
4. The test method for testing the thermal deformation of brake discs according to claim 1, wherein the running-in test method of step B is as follows: the initial speed is 70-90 km/h, the speed is reduced to be less than 20km/h under the braking conditions that the deceleration is 0.27-0.35G and the pressure rising rate of a brake master cylinder is 3000-4000 kPa/s, and the cooling air speed in the test process is 40-60 km/h.
5. The method for testing the thermal deformation of brake discs according to claim 1, wherein the method for testing the thermal deformation of brake discs is as follows: the inertia of the front and rear wheel test is set according to the following requirements: front wheels: i isG=0.5*β*M*R2(ii) a Rear wheels: i isG=0.5*（1-β）*M*R2Wherein beta is the front and rear braking force distribution coefficient, M is the full load mass of the whole vehicle, and R is the rolling radius of the wheels; during the test, the vehicle speed is reduced to zero from the preset initial vehicle speed at the preset deceleration through braking.
6. A CAE simulation method of brake disc thermal deformation, comprising the steps of:
a: firstly, establishing a CAE simulation model, and importing the material and the size parameters of a brake disc into the CAE simulation model;
b: simulating by using the CAE simulation model to obtain simulation data of the thermal deformation of the brake disc; and obtaining measured data of the thermal deformation of the brake disc by using the test method of the thermal deformation of the brake disc as claimed in claim 1;
c: adjusting thermal parameters of a CAE simulation model according to the difference value of the measured data and the simulation data;
d: and repeatedly executing the step B, C until the difference value between the simulation data and the measured data is smaller than a preset value, and obtaining a final CAE simulation model.
7. The CAE simulation method for the thermal deformation of the brake disc according to claim 6, further comprising the steps of changing the brake disc material and/or the dimensional parameters of the CAE simulation model, and repeatedly executing the steps A to D to obtain a universal CAE simulation model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111029754.6A CN113899338A (en) | 2021-09-03 | 2021-09-03 | Brake disc thermal deformation testing and CAE simulation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111029754.6A CN113899338A (en) | 2021-09-03 | 2021-09-03 | Brake disc thermal deformation testing and CAE simulation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113899338A true CN113899338A (en) | 2022-01-07 |
Family
ID=79188302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111029754.6A Pending CN113899338A (en) | 2021-09-03 | 2021-09-03 | Brake disc thermal deformation testing and CAE simulation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113899338A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10053513A1 (en) * | 2000-10-27 | 2002-05-02 | Tuev Kraftfahrt Gmbh Unternehm | Mobile device for calibrating a test stand for vehicle brakes |
| CN103983436A (en) * | 2013-02-07 | 2014-08-13 | 重庆长安汽车股份有限公司 | Brake friction, heating and vibration coupling test table |
| CN104200034A (en) * | 2014-09-10 | 2014-12-10 | 清华大学 | Dry sliding friction-heat-stress-abrasion sequential coupling simulation method |
| CN104615798A (en) * | 2013-11-05 | 2015-05-13 | 同济大学 | Brake judder modeling method based on frictional vibration and thermo-mechanical coupling joint simulation |
| CN107704644A (en) * | 2017-07-20 | 2018-02-16 | 同济大学 | A kind of squeal Forecasting Methodology for considering heat engine coupling effect |
| CN110261130A (en) * | 2019-05-30 | 2019-09-20 | 同济大学 | A kind of automotive disc brake deformation recognition method |
-
2021
- 2021-09-03 CN CN202111029754.6A patent/CN113899338A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10053513A1 (en) * | 2000-10-27 | 2002-05-02 | Tuev Kraftfahrt Gmbh Unternehm | Mobile device for calibrating a test stand for vehicle brakes |
| CN103983436A (en) * | 2013-02-07 | 2014-08-13 | 重庆长安汽车股份有限公司 | Brake friction, heating and vibration coupling test table |
| CN104615798A (en) * | 2013-11-05 | 2015-05-13 | 同济大学 | Brake judder modeling method based on frictional vibration and thermo-mechanical coupling joint simulation |
| CN104200034A (en) * | 2014-09-10 | 2014-12-10 | 清华大学 | Dry sliding friction-heat-stress-abrasion sequential coupling simulation method |
| CN107704644A (en) * | 2017-07-20 | 2018-02-16 | 同济大学 | A kind of squeal Forecasting Methodology for considering heat engine coupling effect |
| CN110261130A (en) * | 2019-05-30 | 2019-09-20 | 同济大学 | A kind of automotive disc brake deformation recognition method |
Non-Patent Citations (1)
| Title |
|---|
| 姜大鑫等: "盘式制动器多物理场结构仿真分析", 《2020中国汽车工程学会年会论文集》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107704644B (en) | Brake squeal prediction method considering heat engine coupling effect | |
| Valvano et al. | An analytical method to predict thermal distortion of a brake rotor | |
| CN103983436A (en) | Brake friction, heating and vibration coupling test table | |
| CN107544284B (en) | Method for controlling friction noise of automobile brake under composite working condition | |
| CN104615798B (en) | Modeling method is shaken in braking based on frictional vibration and heat engine coupling associative simulation | |
| CN112304639B (en) | Vehicle BTV (vehicle to vehicle) complete vehicle testing method | |
| CN111398162B (en) | Method for testing friction coefficient of air pressure disc type brake assembly of commercial vehicle | |
| CN108982122B (en) | Method and device for evaluating influence of dragging torque on energy consumption of automobile | |
| Okamura et al. | Fundamental study on thermal behavior of brake discs | |
| JP2012037280A (en) | Method, apparatus and program for simulating tire performance | |
| CN113899338A (en) | Brake disc thermal deformation testing and CAE simulation method | |
| CN114486287A (en) | Test and evaluation method for vehicle brake noise | |
| CN104842991A (en) | Measurement method of disc brake dragging torque and heating characteristic evaluation method | |
| Palmer et al. | Development of a high fidelity CAE model for predicting brake system temperatures | |
| Suryatama et al. | Contact mechanics simulation for hot spots investigation | |
| CN110231177A (en) | A kind of brake design method based on heat engine coupling deformation testing | |
| JP2022047824A (en) | Simulation method and device of tire | |
| CN113343351A (en) | Thermal-structure coupling analysis method for automobile brake disc | |
| CN115163708A (en) | Real-time detection method and device for temperature of brake disc | |
| D'Hondt et al. | Modeling and Identification of an Electric Vehicle Braking System: Thermal and Tribology Phenomena Assessment | |
| CN113656994A (en) | Method and device for acquiring suspension force of automobile suspension system | |
| CN110887650B (en) | Test method for obtaining high-temperature-resistant range of brake pad | |
| Tomas et al. | A new analytical model of the brake pad for improved calculation of the centre of pressure and friction coefficient in a multi-piston disc brake | |
| CN115728226A (en) | Method for testing friction coefficient of brake of passenger car | |
| ZHANG et al. | Interpretation of Non-Exhaust Brake Emission Standard: Laboratory Testing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220107 |