CN109766592B - Method for designing chassis system of armored vehicle under altitude-variable working condition in plateau - Google Patents
Method for designing chassis system of armored vehicle under altitude-variable working condition in plateau Download PDFInfo
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Abstract
The invention belongs to the technical field of vehicle chassis system design, and particularly relates to a method for designing a plateau variable altitude working condition armored vehicle chassis system.
Description
Technical Field
The invention belongs to the technical field of vehicle chassis system design, and particularly relates to a method for designing a plateau altitude variable working condition armored vehicle chassis system.
Background
In the plateau environment, the atmospheric pressure, the air density, the oxygen content, the air temperature and the boiling point of water all show a descending trend along with the increase of the altitude. The air charging quantity in the cylinder of the diesel engine is reduced, the excess air coefficient is reduced, the combustible mixture is excessively thick, the combustion condition is worsened, the after-combustion phenomenon is serious, the dynamic property and the economical efficiency are reduced, the heat load is increased, the exhaust temperature is increased, and the heat distribution has larger change compared with that in plain areas.
The existing armored vehicle chassis system is designed to mainly calculate and check the maximum power point and the maximum load point of an engine in a plain area, and the plateau use condition is not considered. The technical research at home and abroad aiming at the plateau environment is mainly developed around the power recovery technology of the engine, and the systematic research on the plateau environment adaptability of the chassis system is not developed
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: how to provide a method for designing a chassis system of an armored vehicle under a altitude-variable working condition provides a theoretical basis for plateau adaptive design of a new generation of armored vehicles and plateau adaptive improvement of existing armored vehicles.
(II) technical scheme
In order to solve the technical problem, the invention provides a method for designing a chassis system of an armored vehicle under a altitude-variable working condition, which comprises the following steps:
step 1: determining the working characteristics of the power assembly as the design input of a chassis system;
step 2: designing a chassis system scheme by taking plain working conditions as design points;
and step 3: designing a chassis system scheme by taking plateau working conditions as design points;
and 4, step 4: designing a chassis system control strategy based on multi-objective optimization based on the chassis system scheme designed in the step 3 according to the working characteristics of the power assembly;
and 5: designing a chassis system subsystem according to the chassis system scheme determined in the step 3;
step 6: performing chassis system and subsystem tests on the design calculation result of the step 5;
and 7: correcting the design calculation result of the step 5 according to the test result of the step 6;
and 8: carrying out real vehicle test on the corrected design calculation results of the chassis system and the subsystem to obtain real vehicle test data;
and step 9: and (4) comparing the simulation data with the real vehicle test data, and applying the multi-objective optimization-based chassis system control strategy obtained in the step (4) to improve the chassis system.
In step 1, the operating characteristics of the engine and the transmission component are used as the design input of the chassis system under the conditions of different altitudes, different ambient temperatures and different power recovery degrees of the engine.
In the step 2, matching and designing the chassis system by taking the plain working condition as a design point, matching the heat exchange area of a radiator, the flow of cooling liquid and the air volume of a cooling fan, matching the air intake flow and the air intake resistance, matching the exhaust resistance of an exhaust system and the exhaust pressure of an engine, matching the flow and the system resistance of a heating system and the heating amount of a power assembly under the cold start working condition, and in the design, performing chassis system performance calculation, cold and hot side resistance calculation, system wind side three-dimensional simulation calculation, system hot side one-dimensional simulation calculation and system one-dimensional/three-dimensional coupling simulation calculation, and determining the scheme of the chassis system through iterative calculation.
In the step 3, according to the atmospheric environment characteristic parameter change of the plateau environment, matching and designing a chassis system by taking the plateau working condition as a design point, matching a heat exchange area of a radiator, a flow rate of a cooling liquid and an air volume of a cooling fan, matching an air intake flow rate and an air intake resistance, matching an exhaust resistance of an exhaust system and an exhaust back pressure of an engine, matching a flow rate and a system resistance of a heating system, heating amount under a cold start working condition of a power assembly and the like, in the design, performing chassis system performance calculation, cold and hot side resistance calculation, system wind side three-dimensional simulation calculation, system hot side one-dimensional simulation calculation and system one-dimensional/three-dimensional coupling simulation calculation on the basis of the plateau environment characteristic, and determining a chassis system scheme through iterative calculation.
In the step 4, based on the matched chassis system, according to the working characteristics of the engine and the transmission component under different altitudes and ambient temperatures, table look-up is carried out to obtain physical parameters of atmosphere under the altitude-varying altitude working condition, DOE (data object analysis) simulation calculation is carried out to obtain a multi-parameter control set, and a neural network self-learning algorithm is used for optimizing the multi-parameter control set to form the chassis system control strategy.
In the step 5, according to the chassis system scheme determined in the step 3, determining a corresponding engineering adaptive design scheme including subsystems such as a heat dissipation system, an air intake and exhaust system and a heating system.
In the step 6, a fan performance test, a radiator single body and radiator assembly test, a pipeline flow matching test, a cold air volume measurement test, a warmer performance test, a system matching test under a thermal simulation condition, an air filter resistance test, an air filter filtering efficiency test, an air filter sealing test and an air filter service life test are specifically carried out.
In step 7, according to test data of tests of the chassis system and the subsystem, a preliminary closed loop is formed with a simulation result, and the overall performance of the chassis system is predicted, including the heat balance temperature of the engine and the transmission box component under the altitude-varying working condition, the inlet and outlet temperature, the flow and the pressure of each module on the cold side of the system, the inlet and outlet temperature, the flow and the pressure of each loop heat source component on the hot side of the system, the system heating efficiency and time, the resistance and the flow of the air intake system, the resistance of the exhaust system and the exhaust back pressure of the engine.
In the step 8, the actual vehicle running data in the high-temperature area and the actual vehicle running data in the plateau area are collected through the actual vehicle running test of the vehicle, and the collected data and the result obtained in the seventh step are subjected to further closed loop.
In step 9, the chassis system is improved by increasing the diameter of the cooling fan, increasing the rotation speed of the cooling fan, increasing the heat transfer area of the radiator, increasing the comprehensive control strategy of the heat dissipation system and the heating system, increasing the effective filtering area of the secondary filter of the air filter, and improving the dust extraction capacity of the dust extraction pump of the air intake system.
(III) advantageous effects
Compared with the prior art, the invention provides a method for designing a chassis system of a plateau variable altitude working condition armored vehicle, which is characterized in that under the condition of limited high power density overall structure space, the plateau working condition and the plateau working condition are taken as double design points, the plateau altitude and the external environment temperature condition are integrated, a three-dimensional complex flow field wind side simulation technology and a one-dimensional/three-dimensional complex system multi-parameter coupling simulation technology are taken as the basis, and a bench test and a real vehicle test are combined to form the method for designing the chassis system of the complete plateau variable altitude working condition armored vehicle, so that an important theoretical basis is provided for plateau adaptive design of a new generation of armored vehicle and plateau adaptive improvement of an existing armored vehicle.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
In order to solve the technical problem, the invention provides a method for designing a chassis system of an armored vehicle under a altitude-variable working condition, which comprises the following steps:
step 1: determining the working characteristics (including heat source characteristics, air inlet and outlet flow and pressure requirements, cold start requirements and the like) of the power assembly as the design input of a chassis system;
step 2: designing a chassis system scheme by taking plain working conditions as design points;
and step 3: designing a chassis system scheme by taking plateau working conditions as design points;
and 4, step 4: designing a chassis system control strategy based on multi-objective optimization based on the chassis system scheme designed in the step 3 according to the working characteristics of the power assembly;
and 5: designing a chassis system subsystem (comprising a heat dissipation system, an air intake and exhaust system, a heating system and the like) according to the chassis system scheme determined in the step 3;
step 6: performing chassis system and subsystem tests on the design calculation result of the step 5;
and 7: correcting the design calculation result of the step 5 according to the test result of the step 6;
and 8: carrying out real vehicle test on the corrected design calculation results of the chassis system and the subsystem to obtain real vehicle test data;
and step 9: and (4) comparing the simulation data with the real vehicle test data, and applying the multi-objective optimization-based chassis system control strategy obtained in the step (4) to improve the chassis system.
In step 1, the operating characteristics of the engine and the transmission component are used as the design input of the chassis system under the conditions of different altitudes, different ambient temperatures and different power recovery degrees of the engine.
In the step 2, matching and designing the chassis system by taking the plain working condition as a design point, matching the heat exchange area of a radiator, the flow of cooling liquid and the air volume of a cooling fan, matching the air intake flow and the air intake resistance, matching the exhaust resistance of an exhaust system and the exhaust pressure of an engine, matching the flow and the system resistance of a heating system and the heating amount of a power assembly under the cold start working condition, and in the design, performing chassis system performance calculation, cold and hot side resistance calculation, system wind side three-dimensional simulation calculation, system hot side one-dimensional simulation calculation and system one-dimensional/three-dimensional coupling simulation calculation, and determining the scheme of the chassis system through iterative calculation.
In the step 3, according to the atmospheric environment characteristic parameter change of the plateau environment, matching and designing a chassis system by taking the plateau working condition as a design point, matching a heat exchange area of a radiator, a flow rate of a cooling liquid and an air volume of a cooling fan, matching an air intake flow rate and an air intake resistance, matching an exhaust resistance of an exhaust system and an exhaust back pressure of an engine, matching a flow rate and a system resistance of a heating system, heating amount under a cold start working condition of a power assembly and the like, in the design, performing chassis system performance calculation, cold and hot side resistance calculation, system wind side three-dimensional simulation calculation, system hot side one-dimensional simulation calculation and system one-dimensional/three-dimensional coupling simulation calculation on the basis of the plateau environment characteristic, and determining a chassis system scheme through iterative calculation.
In the step 4, based on the matched chassis system, according to the working characteristics of the engine and the transmission component under different altitudes and ambient temperatures, table look-up is carried out to obtain physical parameters of atmosphere under the altitude-varying altitude working condition, DOE (data object analysis) simulation calculation is carried out to obtain a multi-parameter control set, and a neural network self-learning algorithm is used for optimizing the multi-parameter control set to form the chassis system control strategy.
In the step 5, according to the chassis system scheme determined in the step 3, determining a corresponding engineering adaptive design scheme including subsystems such as a heat dissipation system, an air intake and exhaust system and a heating system.
In the step 6, a fan performance test, a radiator single body and radiator assembly test, a pipeline flow matching test, a cold air volume measurement test, a warmer performance test, a system matching test under a thermal simulation condition, an air filter resistance test, an air filter filtering efficiency test, an air filter sealing test and an air filter service life test are specifically carried out.
In step 7, according to test data of tests of the chassis system and the subsystem, a preliminary closed loop is formed with a simulation result, and the overall performance of the chassis system is predicted, including the heat balance temperature of the engine and the transmission box component under the altitude-varying working condition, the inlet and outlet temperature, the flow and the pressure of each module on the cold side of the system, the inlet and outlet temperature, the flow and the pressure of each loop heat source component on the hot side of the system, the system heating efficiency and time, the resistance and the flow of the air intake system, the resistance of the exhaust system and the exhaust back pressure of the engine.
In the step 8, the actual vehicle running data in the high-temperature area and the actual vehicle running data in the plateau area are collected through the actual vehicle running test of the vehicle, and the collected data and the result obtained in the seventh step are subjected to further closed loop.
In step 9, the chassis system is improved by increasing the diameter of the cooling fan, increasing the rotation speed of the cooling fan, increasing the heat transfer area of the radiator, increasing the comprehensive control strategy of the heat dissipation system and the heating system, increasing the effective filtering area of the secondary filter of the air filter, and improving the dust extraction capacity of the dust extraction pump of the air intake system.
Example 1
In the embodiment, as shown in fig. 1, fig. 1 is a flowchart of a design method of a chassis system of an armored vehicle under a altitude-varying working condition, and the design steps are as follows:
step 1: determining the working characteristics (including heat source characteristics, air inlet and outlet flow and pressure requirements, cold start requirements and the like) of a certain armored vehicle power assembly: the working characteristics of the power assembly are the design input of a chassis system design, the heat source characteristics, the air inlet and exhaust flow and pressure requirements, the cold start requirement and the like of the power assembly under the conditions of different altitudes and ambient temperatures are initially researched, wherein the heat source characteristics of the engine change along with the altitude change, and the power of the armored vehicle engine is reduced by 15% under the condition of a plateau of 4500 m.
Step 2: the chassis system scheme is designed by taking plain working conditions as design points: the method comprises the steps of matching and designing a chassis system by taking a plain working condition (the altitude is 0m, and the environmental temperature is 35 ℃) as a design point, matching the heat exchange area of a radiator, the flow rate of cooling liquid and the air volume of a cooling fan, matching the air intake flow rate and the air intake resistance, matching the exhaust resistance of an exhaust system and the exhaust backpressure of an engine, matching the flow rate and the system resistance of a heating system, heating quantity under the cold starting working condition of a power assembly and the like.
And step 3: the scheme design of the heat dissipation system is carried out by taking plateau working conditions as design points: analyzing the atmospheric environment characteristic parameter change of the plateau environment, matching and designing a heat dissipation system by taking the plateau working condition (the altitude is 4500m, and the environmental temperature is 25 ℃) as a design point, matching the heat exchange area of a radiator, the flow rate of cooling liquid and the air volume of a cooling fan, matching the air intake flow and the air intake resistance, matching the exhaust resistance of an exhaust system and the exhaust back pressure of an engine, matching the flow rate and the system resistance of a heating system, heating quantity under the cold start working condition of a power assembly and the like.
And 4, step 4: developing a multi-objective optimization-based control strategy of the heat dissipation system: based on a well matched chassis system, according to the working characteristics of an engine and a transmission component under the conditions of different altitudes and ambient temperatures, table look-up is carried out to obtain physical parameters of atmosphere under the altitude-variable altitude working condition, DOE (data object analysis) simulation calculation is carried out to obtain a multi-parameter control set, a neural network self-learning algorithm is applied, the control set is optimized, and a chassis system control strategy is formed.
And 5: designing a chassis system subsystem: and determining a corresponding engineering adaptive design scheme of subsystems such as a heat dissipation system, an air intake and exhaust system, a warming system and the like according to the determined overall scheme of the chassis system.
Step 6: performing chassis system subsystem and system bench test: the method comprises the following steps of carrying out a fan performance test, a radiator monomer and radiator assembly test, a pipeline flow matching test, a cold air quantity measurement test, a heater performance test, a system matching test under the thermal simulation condition, an air filter resistance test, an air filter filtering efficiency test, an air filter sealing test, an air filter service life test and the like.
And 7: and correcting the calculation result: according to test data of a chassis system and subsystem tests, a preliminary closed loop is formed with a simulation result, and the overall performance of the chassis system is predicted, wherein the overall performance comprises the heat balance temperature of an engine and a transmission box component under a high altitude-to-altitude working condition, the inlet and outlet temperature, the flow and the pressure of each module on the cold side (wind side) of the system, the inlet and outlet temperature, the flow and the pressure of each loop heat source component on the hot side (cooling liquid side) of the system, the system heating efficiency and time, the resistance and the flow of an air inlet system, the resistance of an exhaust system, the exhaust back pressure of the engine and the like.
And 8: carrying out a real vehicle test: through the actual vehicle running test of the vehicle, the actual vehicle running data in the high-temperature area and the actual vehicle running data in the plateau area are collected, and the data and the result of simulation calculation are closed-loop.
And step 9: improvement of a heat dissipation system: the simulation data and the real vehicle test data are compared, a multi-objective optimization control strategy based on a DOE method is applied, and the chassis system is improved, wherein the multi-objective optimization control strategy comprises the steps of increasing the diameter of a cooling fan, increasing the rotating speed of the cooling fan, increasing the heat transfer area of a radiator, increasing the comprehensive control strategy of a heating system, increasing the effective filtering area of a secondary filter of an air filter, improving the dust extraction capacity of a dust extraction pump of an air inlet system and the like, so that the whole chassis system can meet the influence caused by severe environment under the working condition of variable altitude, and the chassis system can work reliably and efficiently.
In conclusion, the plateau altitude variable working condition armored vehicle chassis system design method is feasible, takes the plain working condition and the plateau working condition as double design points, integrates the plateau altitude and the external environment temperature condition, is based on the three-dimensional complex flow field wind side simulation technology and the one-dimensional/three-dimensional complex system multi-parameter coupling simulation technology, combines the bench test and the practical vehicle test, forms the complete plateau altitude variable working condition armored vehicle chassis system design method, and provides an important theoretical basis for plateau adaptive design and plateau adaptive improvement of the existing armored vehicle of the new generation.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A method for designing a chassis system of an armored vehicle under a altitude-variable working condition is characterized by comprising the following steps:
step 1: determining the working characteristics of the power assembly as the design input of a chassis system;
step 2: the chassis system design is carried out by taking the plain working condition as a design point, the scheme is matched with the air intake flow and the air intake resistance, the exhaust resistance of an exhaust system and the exhaust pressure of an engine are matched, the flow and the system resistance of a heating system and the heating quantity of a power assembly under the cold starting working condition are matched, and in the design, the performance of the chassis system is calculated;
and step 3: the method comprises the following steps of designing a chassis system scheme by taking plateau working conditions as design points, matching air intake flow and air intake resistance according to atmospheric environment characteristic parameter changes of the plateau environment, matching exhaust resistance of an exhaust system and exhaust back pressure of an engine, matching flow and system resistance of a heating system and heating quantity of a power assembly under a cold start working condition, and calculating the performance of the chassis system based on the plateau environment characteristics in the design;
and 4, step 4: according to the working characteristics of the power assembly and the chassis system scheme designed in the step 3, a chassis system control strategy based on multi-objective optimization is designed, according to the working characteristics of the engine and the transmission component under the conditions of different altitudes and ambient temperatures, physical parameters of the atmosphere under the high altitude change working condition are obtained by table lookup, DOE (design of element analysis) simulation calculation is carried out to obtain a multi-parameter control set, and the multi-parameter control set is optimized by using a neural network self-learning algorithm to form the chassis system control strategy;
and 5: designing a chassis system subsystem according to the chassis system scheme determined in the step 3, and determining a corresponding engineering adaptability design scheme comprising a heat dissipation system, an air intake and exhaust system and a heating system subsystem;
step 6: performing chassis system and subsystem tests on the design calculation result of the step 5, specifically a warmer performance test, an air filter resistance test, an air filter filtering efficiency test, an air filter sealing test and an air filter service life test;
and 7: correcting the design calculation result in the step 5 according to the test result in the step 6, forming a preliminary closed loop with a simulation result according to test data of a chassis system and a subsystem test, and predicting the overall performance of the chassis system, wherein the overall performance comprises the heat balance temperature of an engine and a transmission box component under a high altitude variable altitude working condition, the inlet and outlet temperature, the flow and the pressure of each module on the cold side of the system, the inlet and outlet temperature, the flow and the pressure of each loop heat source component on the hot side of the system, the system heating efficiency and time, the resistance and the flow of an air inlet system, the resistance of an exhaust system and the exhaust back pressure of the engine;
and 8: carrying out real vehicle test on the corrected design calculation results of the chassis system and the subsystem to obtain real vehicle test data;
and step 9: and (4) comparing the simulation data with the real vehicle test data, applying the multi-objective optimization-based chassis system control strategy obtained in the step (4), and improving the chassis system in a mode of increasing a comprehensive control strategy of a heat dissipation system and a heating system, increasing the effective filtering area of the secondary filter of the air filter and improving the dust extraction capacity of the dust extraction pump of the air inlet system.
2. The method for designing a chassis system of an armored vehicle at a high altitude varying condition according to claim 1, wherein in step 1, the operating characteristics of the engine and transmission components at different altitudes, ambient temperatures, and different power recovery levels of the engine are designed as design inputs for the chassis system.
3. The method for designing the chassis system of the armored vehicle with the high altitude change working condition according to claim 1, wherein in the step 2, the matching and design of the chassis system are performed by taking the plain working condition as a design point, the heat exchange area of a radiator, the flow rate of cooling liquid and the air volume of a cooling fan are matched, the air intake flow rate and the air intake resistance are matched, the exhaust resistance of an exhaust system and the exhaust pressure of an engine are matched, the flow rate and the system resistance of a heating system are matched, and the heating amount of a power assembly under the cold start working condition is matched.
4. The method of designing a chassis system of an armored vehicle with high altitude change conditions as claimed in claim 1, it is characterized in that in the step 3, according to the atmospheric environmental characteristic parameter change of the plateau environment, matching and designing a chassis system by taking plateau working conditions as design points, matching heat exchange area of a radiator, flow of cooling liquid and air volume of a cooling fan, matching air inlet flow and air inlet resistance, matching exhaust resistance of an exhaust system and exhaust back pressure of an engine, matching flow and system resistance of a heating system and heating quantity of a power assembly under a cold start working condition, in the design, the performance calculation of a chassis system, the cold and hot side resistance calculation, the three-dimensional simulation calculation of the wind side of the system, the one-dimensional simulation calculation of the hot side of the system and the one-dimensional/three-dimensional coupling simulation calculation of the system are carried out based on the plateau environment characteristics, and the scheme of the chassis system is determined through iterative calculation.
5. The method for designing a chassis system of an armored vehicle with high altitude varying conditions according to claim 1, wherein in the step 6, a fan performance test, a test of a radiator monomer and a radiator assembly, a pipeline flow matching test, a cold air volume measurement test, a heater performance test, a system matching test under thermal simulation, an air filter resistance test, an air filter filtration efficiency test, an air filter sealing test and an air filter service life test are specifically performed.
6. The method for designing a chassis system of an armored vehicle with high altitude change conditions as claimed in claim 1, wherein in step 8, the actual vehicle running data in the high temperature area and the actual vehicle running data in the plateau area are collected through the actual vehicle running test of the vehicle, and the collected data and the result obtained in the seventh step are further closed-loop.
7. The method of designing a chassis system of an armored vehicle with high altitude varying conditions as claimed in claim 1, wherein the means for modifying the chassis system in step 9 includes increasing the diameter of the cooling fan, increasing the rotation speed of the cooling fan, increasing the heat transfer area of the radiator, increasing the control strategy of the heat dissipation system and the heating system, increasing the effective filtering area of the secondary filter of the air filter, and increasing the dust-extracting capacity of the dust-extracting pump of the air intake system.
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| CN110929334B (en) * | 2019-10-30 | 2023-04-28 | 中国北方车辆研究所 | Method for calculating transmission efficiency of gear shifting dynamic working conditions of crawler armored vehicle |
| CN110851993B (en) * | 2019-11-20 | 2023-03-28 | 中国北方车辆研究所 | Design method of top-down power transmission auxiliary system |
| CN113378496B (en) * | 2021-07-26 | 2023-12-05 | 三一重机有限公司 | Engineering machinery and method for calculating inlet and outlet temperatures of radiator of engineering machinery |
| CN116522779B (en) * | 2023-04-29 | 2023-10-20 | 中国人民解放军63963部队 | Armored vehicle dynamic performance and engine operation MAP graph matching system and method |
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