CN112597684A - Method for extracting static load of power assembly support 28 under working condition - Google Patents
Method for extracting static load of power assembly support 28 under working condition Download PDFInfo
- Publication number
- CN112597684A CN112597684A CN202011560546.4A CN202011560546A CN112597684A CN 112597684 A CN112597684 A CN 112597684A CN 202011560546 A CN202011560546 A CN 202011560546A CN 112597684 A CN112597684 A CN 112597684A
- Authority
- CN
- China
- Prior art keywords
- power assembly
- static load
- spline
- load
- working conditions
- 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.)
- Granted
Links
- 230000003068 static effect Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000005284 excitation Effects 0.000 claims abstract description 31
- 238000004088 simulation Methods 0.000 claims abstract description 22
- 238000000605 extraction Methods 0.000 claims abstract description 7
- 238000010276 construction Methods 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 abstract description 15
- 230000010354 integration Effects 0.000 abstract description 4
- 230000001960 triggered effect Effects 0.000 abstract description 2
- 238000004458 analytical method Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013524 data verification Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Geometry (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Automation & Control Theory (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a method for extracting a static load of a power assembly support 28 under a working condition, which comprises the following steps: s1, building a multi-body dynamic model of the power assembly system, which is called the power assembly model for short; s2, constructing an excitation rack of the associated power assembly model, wherein the construction of the excitation rack comprises the establishment of an external excitation center point, the stress direction of the center point and a driving force moment spline, and the spline point on the driving force moment spline is an external excitation load under 28 working conditions; and S3, triggering simulation, sequentially and automatically finishing static load extraction at the interface points of each support under 28 working conditions based on external excitation loads at the points of the driving moment sample strip, and deriving static load files at the nodes of each support under 28 working conditions at one time. After a simulation program is triggered, simulation of 28 working conditions is automatically completed, unified power assembly support load files are output simultaneously, manual processing and integration are not needed again, a simulation method is simplified, processing time is greatly shortened, and errors of load file integration processing in the process are avoided.
Description
Technical Field
The invention belongs to the technical field of dynamic load simulation, and particularly relates to a method for extracting a static load of a power assembly support 28 under a working condition.
Background
At the initial stage of vehicle structure design, the static load of the power assembly support can be correctly extracted, and the guidance on the strength design is particularly important. With the continuous progress and development of finite element technology and computer hardware resources, static load extraction and structural member strength simulation analysis have been widely applied in vehicle development. The detailed technical scheme is as follows: 1) building a multi-body dynamics model of the power assembly system by using multi-body dynamics software; 2) calculating an external load file (namely 28 working condition stress conditions of the center of mass of the power assembly) according to the required static working condition; 3) loading an external load file, running simulation analysis, and extracting acting force between the joint points of each movable main support; 4) accuracy of the analysis processing and checking of the load of the bracket interface point 5) adding the extracted load into finite element analysis software to analyze whether the strength design of the bracket meets the requirements. The method for extracting the static load of the power assembly support 28 under the working condition has the following defects:
problem 1) when performing static load extraction on a mobile main frame, the currently common method is: 1. loading under a single working condition, and extracting the load between the connection points; 2. and after the 28 working conditions are extracted in sequence, combining the 28 load files. The method needs to run 28 times of simulation, and is complex; secondly, when 28 working condition loads are combined, only manual processing can be relied on, and data are various and prone to errors.
Disclosure of Invention
The invention provides a method for extracting a static load of a power assembly support 28 under a working condition, aiming at solving the problems.
The invention is realized in such a way that a method for extracting the static load of a power assembly support 28 under the working condition specifically comprises the following steps:
s1, building a multi-body dynamic model of the power assembly system
S2, constructing an excitation rack, namely establishing an externally excited center of mass point, a stress direction of the center of mass point and a driving force moment spline, wherein the spline point on the driving force moment spline is an external excitation load under 28 working conditions;
and S3, associating the excitation rack with an externally excited power assembly model, triggering simulation, sequentially and automatically finishing static load extraction at the interface points of each support under 28 working conditions based on external excitation loads at the points of each support on a driving moment spline, and deriving static load files at the nodes of each support under 28 working conditions at one time.
Further, after step S3, the method further includes:
s4, sorting the data of the static load file based on the blank space, importing the data into an excel table,
s5, automatically generating two data tables in the excel table, namely a for _ id table and a for _ step table;
the for _ id table is a static load table of the same node under different working conditions, and the for _ step table is a static load table of each node under the same working conditions.
Further, the construction method of the excitation rack specifically comprises the following steps:
s21, establishing an action point of external excitation, and taking the center of mass position of the power assembly as the action point of the external excitation;
s22, establishing a stress coordinate system of a centroid point of the power assembly and a blank driving moment spline in the Y direction;
and S23, calculating the external excitation load of the working condition of the powertrain support 28, and inputting the calculated value into a blank driving torque spline to form a driving torque spline consisting of 28 spline points.
The method for extracting the static load of the power assembly support 28 under the working condition has the following beneficial technical effects:
1) by establishing a driving moment spline, integrating 28 times of simulation into one time of simulation operation, namely triggering a simulation program, automatically completing the simulation of 28 working conditions, and simultaneously outputting a unified power assembly support load file without manually processing and integrating again, simplifying a simulation method, greatly shortening the processing time and avoiding the error of load file integration processing in the process;
2) aiming at the output load file format, a corresponding automatic processing program is compiled, and the load file is processed into results which are sequentially sequenced according to the loads of all interface points under different working conditions, so that the data verification and verification are facilitated, the processing time is greatly shortened, and the error of the integrated processing of the load file in the process is avoided.
Drawings
Fig. 1 is a flowchart of a method for extracting a static load of a powertrain support 28 under a working condition according to an embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be given in order to provide those skilled in the art with a more complete, accurate and thorough understanding of the inventive concept and technical solutions of the present invention.
Fig. 1 is a flowchart of a method for extracting a static load of a powertrain support 28 under a working condition according to an embodiment of the present invention, where the method specifically includes the following steps:
s1, building a multi-body dynamic model of the power assembly system, wherein the model integrates corresponding templates in ADAMS/Car software, and only needs to be modified and stored according to parameters of the model, so that the modeling method is mature;
s2, constructing an excitation rack based on ADAMS/Car software, wherein the construction method comprises the following specific steps:
s21, establishing an action point of external excitation General _ Force according to a 28 working condition excitation principle, taking the centroid position of the power assembly as the action point of the external excitation, wherein the excitation direction of the action point is consistent with the direction of a coordinate system of the whole vehicle, and the external excitation is applied to the power assembly through the ground;
s22, establishing a stress coordinate system of the center of mass point of the power assembly, namely, the stress directions of an X axis, a Y axis and a Z axis in the stress coordinate system and a blank driving moment spline in the Y direction;
and S23, calculating the external excitation load of the working condition of the powertrain support 28, and inputting the calculated value into a blank driving torque spline to form a driving torque spline consisting of 28 spline points. And calculating the external force load borne by the center of mass of the power assembly under each working condition by using the calculation function of the EXCEL, and correspondingly editing a blank driving torque spline established in the step S22.
S3, the excitation rack is associated with an externally excited power assembly model, the power assembly model is converted into an ADAMS/View module, model attribute files are read in, and finite element format files of static loads of all supports are derived through simulation, wherein the process is as follows:
s31, in order to export the finite element format files of the static load of the support under a plurality of working conditions at one time and ensure that each working condition is a static load working condition, the simulation operation needs to be carried out according to the following special steps:
and opening a simulation setting window, wherein the end time is set as: driving the number of sample strips on the moment sample strip; steps is set to: subtracting 1 from the end time value every time the static load extraction under one working condition is finished; type sets up to: static; then, after the simulation is triggered, based on external excitation loads on various sample points on the driving moment sample strips, the extraction of the static loads of the support under 28 working conditions is automatically completed in sequence;
and opening a File output window, wherein the File Type is set as: FEA Loads; format is set as: NASTRAN (which may be selected based on late intensity analysis correspondence software); the File Name names the output load files according to the definition; if the setting is as follows: left _ break _ active; analysis is set to: last _ Run, namely pointing to the simulation working condition which is just Run; because the support adopts a Rigid Body model, a Loads on a logic Body item is selected; the Rigid body FEA origin marker is selected as: a marker point (an interface point to be coordinated) on the support rigid body is established based on the zero point of the whole vehicle; and then clicking Add Load Points to node tables, displaying coordinates of the interface Points of the support in a window lower Table, sequentially inputting node numbers according to the requirements of finite element Nodes, and finally clicking OK, and exporting a corresponding static Load file (file: left _ break _ active. bdf) in the NASTRAN format of the support.
S4, before the load file is output to the strength analysis, the correctness of the load file needs to be confirmed, and it takes time and complexity to manually check the load file. The method includes the steps that a corresponding load file processing program is written by using an M file in matlab, a load file (left _ break _ active. bdf) in NASTRAN format is opened in excel, column data is intercepted according to spaces and stored in excel format (left _ break _ active. xlsx), the processing program is operated, the just-stored excel file is read, two data check tables, namely a for _ id table and a for _ step table are automatically generated in the excel file after operation is completed, the for _ id table is a static load table of the same node under different working conditions, and the for _ step table is a static load table of each node under the same working condition. According to the characteristic that the stress of the bracket in all directions is balanced under all working conditions, the three-direction force of each node is matched with the self-weight of the bracket, and the load file can be judged to be correct.
The method for extracting the static load of the power assembly support 28 under the working condition has the following beneficial technical effects:
1) by establishing a driving moment spline, integrating 28 times of simulation into one time of simulation operation, namely triggering a simulation program, automatically completing the simulation of 28 working conditions, and simultaneously outputting a unified power assembly support load file without manually processing and integrating again, simplifying a simulation method, greatly shortening the processing time and avoiding the error of load file integration processing in the process;
2) aiming at the output load file format, a corresponding automatic processing program is compiled, and the load file is processed into results which are sequentially sequenced according to the loads of all interface points under different working conditions, so that the data verification and verification are facilitated, the processing time is greatly shortened, and the error of the integrated processing of the load file in the process is avoided.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (3)
1. A method for extracting the static load of a power assembly support 28 under working conditions is characterized by comprising the following steps:
s1, building a multi-body dynamic model of the power assembly system, which is called the power assembly model for short;
s2, constructing an excitation rack of the associated power assembly model, wherein the construction of the excitation rack comprises the establishment of an external excitation center point, the stress direction of the center point and a driving force moment spline, and the spline point on the driving force moment spline is an external excitation load under 28 working conditions;
and S3, triggering simulation, sequentially and automatically finishing static load extraction at the interface points of each support under 28 working conditions based on external excitation loads at the points of the driving moment sample strip, and deriving static load files at the nodes of each support under 28 working conditions at one time.
2. The method for extracting the operating condition static load of the powertrain support 28 according to claim 1, further comprising, after step S3:
s4, sorting the data of the static load file based on the blank space, importing the data into an excel table,
s5, automatically generating two data tables in the excel table, namely a for _ id table and a for _ step table;
the for _ id table is a static load table of the same node under different working conditions, and the for _ step table is a static load table of each node under the same working conditions.
3. The method for extracting the working condition static load of the powertrain support 28 according to claim 1, wherein the method for constructing the excitation rack comprises the following steps:
s21, establishing an action point of external excitation, and taking the center of mass position of the power assembly as the action point of the external excitation;
s22, establishing a stress coordinate system of a centroid point of the power assembly and a blank driving moment spline in the Y direction;
and S23, calculating the external excitation load of the working condition of the powertrain support 28, and inputting the calculated value into a blank driving torque spline to form a driving torque spline consisting of 28 spline points.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011560546.4A CN112597684B (en) | 2020-12-25 | 2020-12-25 | Method for extracting static load of power assembly bracket 28 under working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011560546.4A CN112597684B (en) | 2020-12-25 | 2020-12-25 | Method for extracting static load of power assembly bracket 28 under working condition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112597684A true CN112597684A (en) | 2021-04-02 |
| CN112597684B CN112597684B (en) | 2024-06-25 |
Family
ID=75201920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011560546.4A Active CN112597684B (en) | 2020-12-25 | 2020-12-25 | Method for extracting static load of power assembly bracket 28 under working condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112597684B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113283009A (en) * | 2021-05-25 | 2021-08-20 | 东风汽车集团股份有限公司 | Adams-based suspension part working condition load preparation system, method and medium |
| CN113434964A (en) * | 2021-07-23 | 2021-09-24 | 宜宾凯翼汽车有限公司 | Method for extracting and processing static load of vehicle body |
| CN113486563A (en) * | 2021-08-04 | 2021-10-08 | 安徽江淮汽车集团股份有限公司 | Method for extracting strength load of whole vehicle |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1710654A1 (en) * | 2005-04-08 | 2006-10-11 | Ford Global Technologies, LLC | Method and system for active vibration isolation in automotive vehicles |
| CN102609551A (en) * | 2011-01-21 | 2012-07-25 | 北京汽车研究总院有限公司 | Design optimization method and optimization device of power assembly mounting system |
| CN103235605A (en) * | 2013-04-19 | 2013-08-07 | 南京工业大学 | Working condition-simulating numerically controlled rotary table test-bed loading control system and control method |
| CN105354378A (en) * | 2015-10-30 | 2016-02-24 | 北京新能源汽车股份有限公司 | Vehicle suspension load analysis method and analysis system |
| CN105631060A (en) * | 2014-10-29 | 2016-06-01 | 广州汽车集团股份有限公司 | Static load analysis data processing method for automobile chassis suspension system |
| CN106644499A (en) * | 2016-09-09 | 2017-05-10 | 北京新能源汽车股份有限公司 | Electric automobile power assembly intensity test method and system |
| CN106840338A (en) * | 2017-03-02 | 2017-06-13 | 重庆长安汽车股份有限公司 | A kind of dynamic load acquisition methods of twist-beam suspension core wheel |
| CN106934127A (en) * | 2017-02-28 | 2017-07-07 | 江铃汽车股份有限公司 | The stress acquisition methods of the metallic framework of powertrain mounting system |
| CN110119573A (en) * | 2019-05-14 | 2019-08-13 | 威马智慧出行科技（上海）有限公司 | The extracting method and device of vehicle suspension dead load |
| CN110414096A (en) * | 2019-07-12 | 2019-11-05 | 南京理工大学 | A kind of true road spectrum playback system and method based on Matlab/Adams associative simulation |
| CN110851910A (en) * | 2018-07-24 | 2020-02-28 | 上汽通用五菱汽车股份有限公司 | Optimization method for engine power assembly suspension system |
| CN111209699A (en) * | 2019-12-31 | 2020-05-29 | 的卢技术有限公司 | Automatic extraction method and system based on vehicle suspension static load |
-
2020
- 2020-12-25 CN CN202011560546.4A patent/CN112597684B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1710654A1 (en) * | 2005-04-08 | 2006-10-11 | Ford Global Technologies, LLC | Method and system for active vibration isolation in automotive vehicles |
| CN102609551A (en) * | 2011-01-21 | 2012-07-25 | 北京汽车研究总院有限公司 | Design optimization method and optimization device of power assembly mounting system |
| CN103235605A (en) * | 2013-04-19 | 2013-08-07 | 南京工业大学 | Working condition-simulating numerically controlled rotary table test-bed loading control system and control method |
| CN105631060A (en) * | 2014-10-29 | 2016-06-01 | 广州汽车集团股份有限公司 | Static load analysis data processing method for automobile chassis suspension system |
| CN105354378A (en) * | 2015-10-30 | 2016-02-24 | 北京新能源汽车股份有限公司 | Vehicle suspension load analysis method and analysis system |
| CN106644499A (en) * | 2016-09-09 | 2017-05-10 | 北京新能源汽车股份有限公司 | Electric automobile power assembly intensity test method and system |
| CN106934127A (en) * | 2017-02-28 | 2017-07-07 | 江铃汽车股份有限公司 | The stress acquisition methods of the metallic framework of powertrain mounting system |
| CN106840338A (en) * | 2017-03-02 | 2017-06-13 | 重庆长安汽车股份有限公司 | A kind of dynamic load acquisition methods of twist-beam suspension core wheel |
| CN110851910A (en) * | 2018-07-24 | 2020-02-28 | 上汽通用五菱汽车股份有限公司 | Optimization method for engine power assembly suspension system |
| CN110119573A (en) * | 2019-05-14 | 2019-08-13 | 威马智慧出行科技（上海）有限公司 | The extracting method and device of vehicle suspension dead load |
| CN110414096A (en) * | 2019-07-12 | 2019-11-05 | 南京理工大学 | A kind of true road spectrum playback system and method based on Matlab/Adams associative simulation |
| CN111209699A (en) * | 2019-12-31 | 2020-05-29 | 的卢技术有限公司 | Automatic extraction method and system based on vehicle suspension static load |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113283009A (en) * | 2021-05-25 | 2021-08-20 | 东风汽车集团股份有限公司 | Adams-based suspension part working condition load preparation system, method and medium |
| CN113434964A (en) * | 2021-07-23 | 2021-09-24 | 宜宾凯翼汽车有限公司 | Method for extracting and processing static load of vehicle body |
| CN113486563A (en) * | 2021-08-04 | 2021-10-08 | 安徽江淮汽车集团股份有限公司 | Method for extracting strength load of whole vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112597684B (en) | 2024-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112597684B (en) | Method for extracting static load of power assembly bracket 28 under working condition | |
| CN109376378B (en) | Front-back processing method for rapidly extracting rigidity result of white car body mounting point | |
| CN110119573B (en) | Method and device for extracting static load of vehicle suspension | |
| CN111209699A (en) | Automatic extraction method and system based on vehicle suspension static load | |
| CN103678737B (en) | A kind of lever system dummy assembly method | |
| CN105677306A (en) | Automation script compiling method and device | |
| CN113434964B (en) | Method for extracting and processing static load of vehicle body | |
| CN107862133B (en) | Method for generating BIM models of piers in batches | |
| CN113783721B (en) | Credibility modeling and verifying method for industrial control network protocol | |
| CN103677811A (en) | Design system and method of spacecraft development process | |
| CN101281659B (en) | Method for modeling finite element of multi-frame integral structure component | |
| CN112732237A (en) | Method and system for constructing code-free development technology model | |
| CN113065186B (en) | Load loading method, device, equipment and storage medium | |
| CN103279354B (en) | The automatic production generation method of DRC file and generator | |
| CN113591219A (en) | Multi-working-condition CAE transient fatigue analysis loading method for whole vehicle | |
| CN110096292B (en) | Method and system for refreshing BIOS firmware of server in self-adaptive manner | |
| CN113987764A (en) | Simulation model construction method and system based on SCA domain description file | |
| CN113821959A (en) | Suspension load decomposition, data processing and finite element load loading method | |
| CN116383976B (en) | Whole vehicle strength load extraction method and system | |
| CN113642102B (en) | Automatic modeling method for rigid body pairs in collision model | |
| CN113536448A (en) | Processing method and device for establishing finite element analysis model and upper computer | |
| CN113569419B (en) | Rapid generation system and method for three-dimensional final assembly model of liquid rocket engine | |
| CN111597630B (en) | Joint selection method, device, equipment and storage medium | |
| MOCIRAN et al. | Methods of interconnecting designing programs simulation and optimization in engineering | |
| CN116894295A (en) | Finite element modeling method for arbitrary opening posture of front cover of automobile four-bar hinge |
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 | ||
| GR01 | Patent grant |