CN102201025B - Design method of head form of high-speed train - Google Patents
Design method of head form of high-speed train Download PDFInfo
- Publication number
- CN102201025B CN102201025B CN201110191550A CN201110191550A CN102201025B CN 102201025 B CN102201025 B CN 102201025B CN 201110191550 A CN201110191550 A CN 201110191550A CN 201110191550 A CN201110191550 A CN 201110191550A CN 102201025 B CN102201025 B CN 102201025B
- Authority
- CN
- China
- Prior art keywords
- ccp
- profile
- train
- correction
- head dummy
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Abstract
The invention clams a design method of a head form of a high-speed train, comprising the steps of: 1) performing discrete processing on the outline of a designed train head form to form a surface grid fitted with the outline of a primary head form; 2) selecting key control points according to the features of the head form, and determining the position parameters of the key control points; 3) determining the control regions of the selected key control points; 4) setting the amendment quantity of each selected key control point; 5) calculating the amendment quantity of each grid point in the control region of each key control point according to the amendment quantity of each key control point and the distribution function in the control region; and 6) overlapping the amendment quantity with the relevant grid point coordinates of the primary outline joint by joint according to the grid point positions. By use of the design method, the influence scope of the designed parameters on aerodynamic resistance, elevating force and intersection pressure wave and other key performance indexes of the train can be acquired through numerical analysis and other means, thereby a guiding direction for further amendment of the head form is provided.
Description
Technical field
The present invention relates to a kind of method for designing of train head dummy, relate in particular to a kind of method for designing of bullet train head dummy.
Background technology
Bullet train transportation system has become the advanced delivery vehicle that world many countries is given priority at present.Japan's present travelling speed in the Shinkansen is above 320 kilometers/hour; The top speed of French TGV called train has broken through 574 kilometers/hour; The travelling speed of the military wide high ferro of China surpasses 350 kilometers/hour, and the travelling speed of Shanghai-Hangzhou high ferro breaks through 482 kilometers/hour, becomes the first in the world.Along with improving constantly of train operation speed, air is also increasing to the influence of train.At first, along with the raising of train speed, air resistance is square law and rises, and when train speed per hour surpasses 350 kilometers/hour, the air resistance of train has surpassed 90% of drag overall.Secondly, the raising of train speed will cause pneumatic phenomenons such as intersection pressure wave, tunnel microbarometric wave, have a strong impact on the safety and the riding comfort of train.
Because the aerodynamics problem influence is significantly, the design of bullet train low speed train different from the past, a wherein very important variation that the aspect is the train head dummy, the head dummy of bullet train need be taken into account aesthetic property, practicality and good factors such as aeroperformance.
The bullet train head dummy of China and world other countries all adopts airflow design, to guarantee its better aerodynamic characteristics.Main design comprises two kinds at present, and a kind of CAD software that is based on adopts the combination of all kinds of SPLs or curved surface that head dummy is designed; Wherein can adopt general CAD software,, also can adopt the design software of exploitation voluntarily or secondary development (flat referring to being permitted like AutoCAD, UG, ProE, CATIA etc.; The field red flag, Yao Shuguang, streamlined train head configuration method for designing; China's railway science, 2007).Another kind is according to bionics principle; Abstract through existing biology, object and view (like dragon, bullet, sword, river) etc. being carried out art; Its characteristics are incorporated the train head dummy; And then design the streamlined train head dummy, kind of head dummy surplus for example China's Beijing-Shanghai express railway of being about to open has promptly designed ten according to this kind method is analyzed relatively to reach and is improved that the back is final confirms actual profile.
Head dummy design problem for train; No matter adopt above-mentioned which kind of mode to design; All be difficult to make the train head dummy to guarantee good comprehensive performances through once designing, generally need on the basis of initial designs, by means of various analysis means; The train head dummy is constantly revised, analyzed and optimizes, could obtain more excellent design relatively.Therefore, the reasonable correction for profile is the only stage which must be passed by of train head dummy design.
The following factor of the main considered of head dummy correction of train profile: 1) original shape of train head dummy refines through art or the surface modeling acquisition often; Wherein possibly contain a large amount of humane factors and practical theory, so the profile correction should keep the modeling characteristic of former profile as far as possible; 2) the profile correction must be considered actual constraint condition; The physical dimension of putting directly some position of head dummy like internal unit retrains; The bend glass at driving cabin position need guarantee that its angle of inclination changes within the specific limits for another example, otherwise will influence sight line of driver etc., therefore; In the actual correction of the flank shape, some position of head dummy will not allow to change; 3) the profile correction should utilize less reference mark, the so effectively workload in finding correction of the flank shape stage as far as possible; 4) after the profile correction, relevant coupling part should be consistent with the smooth degree of former profile, generally need guarantee single order smooth (being that derivative is continuous) at least.
Since adopt fairshaped design, smooth excessive between the each several part of the whole head dummy of bullet train, the general very difficult key design parameter that directly extracts.Existing designing technique (like patent CN1634735A, open day on July 6th, 2005, patent CN101290636, open day on October 22nd, 2008, etc.) be difficult to satisfy simultaneously above-mentioned several requirements.Even adopt technological means such as reverse-engineering, the head dummy controlled variable of train is extracted, also be difficult to satisfy simultaneously above-mentioned several requirements.
Summary of the invention
Problem to prior art exists the object of the present invention is to provide a kind of bullet train head dummy method for designing, can carry out good optimal design.
A kind of bullet train head dummy method for designing of the present invention comprises the steps:
1) profile of the train head dummy that designed is done discrete processes, form and the profile of the initial head dummy surface mesh of match mutually;
2) select CCP also to confirm the location parameter of this CCP according to the characteristics of head dummy;
3) confirm the control domain of selected CCP, and confirm the shape and the size of this control domain;
4) correction of given selected each CCP, the distribution function in simultaneously given each CCP control neighborhood;
5) according to the correction and the distribution function of each CCP in the control neighborhood of each CCP, calculate the correction that obtains each net point in each CCP control neighborhood;
6) correction is pressed the associated nets lattice point coordinate stack of pointwise of net point position and former profile, thereby obtain revised train profile.
Preferably, said CCP is following radome fairing depression points, nose cone point, protecgulum-driving cabin tie point.
The present invention has following advantage:
1) sensitivity analysis of train head dummy.After the method that adopts the present invention to propose is carried out parametrization to the train head dummy; Can obtain the influence amplitude of design parameter through means such as numerical analyses, for further head dummy correction provides direction to Key Performance Indicators such as train aerodynamic drag, lift, intersection pressure waves;
2) the aerodynamic noise source identification of train head; Adopt this method that head dummy is carried out parametrization; Through extracting different control parameters, after aerodynamic noise calculates, can directly obtain train head main aerodynamic noise source and different parts the influence of train aerodynamic noise is compared;
3) optimal design of train head dummy, the parametric method that utilizes the present invention to propose can combine with numerical analysis and Optimization Design, carries out the optimal design work of train head dummy.
Description of drawings
Fig. 1 is the embodiment of the invention initial head dummy three-dimensional profile of train head figure to be revised;
Fig. 2 is an initial table veil lattice distribution synoptic diagram;
Fig. 3 is that the radome fairing depression points reduces the comparison diagram after 5% under the train head of Fig. 1;
Fig. 4 is that the train head nose cone length of Fig. 1 increases the comparison diagram after 5%;
Fig. 5 is that Fig. 1 train head nose cone height increases the comparison diagram after 20%;
Fig. 6 increases the comparison diagram after 10% for Fig. 1 protecgulum-driving cabin tie point axon of validating the car to the position;
Fig. 7 a and 7b are that synthesizing map 2～Fig. 6 is through the revised head dummy comparison diagram of multiparameter.
Embodiment
Main design thought of the present invention is:
1) profile of initial head dummy is carried out discretize, promptly mark off surface mesh;
2) according to the characteristics designated key reference mark and the location parameter thereof of head dummy, the definite of reference mark number of parameters and position decides according to actual conditions, and the location parameter at said reference mark is generally based on rectangular coordinate system in space, given its D coordinates value;
3) to given its control domain scope of each CCP, the notion of said control domain is that the neighborhood that variation influenced at reference mark is interval, and this control domain shape and size should be given according to actual conditions;
4) confirm that through search the coordinate of reference mark and control domain belongs to the position of surface mesh lattice point, searching method can adopt general searching method, like traversal search method, dichotomy etc.;
5) correction of given each CCP, correction can confirm with direction cosine through specifying the distance between itself and CCP, also can be definite through the three-dimensional coordinate side-play amount of given CCP;
6) distribution function in given each CCP control neighborhood, promptly each controls the interpolating function in neighborhood, and the influence degree of each CCP correction to associated nets lattice point correction in its control neighborhood confirmed in acting as of this function.This distribution function should require given according to the characteristics of exact shape and the slickness on control neighborhood border.Generally can adopt cosine distribution function, sigmoid function or comparatively complicated splines;
7) according to the correction and the distribution function in the control neighborhood thereof of each CCP, calculate the correction that obtains each net point in its control neighborhood;
8) correction is pressed the associated nets lattice point coordinate stack of pointwise of net point position and former profile, obtain revised train profile.
Come further to specify mentality of designing of the present invention below in conjunction with accompanying drawing.
The original shape of train flow line style head is as shown in Figure 1.
Whole head dummy can roughly be divided into several zones such as radome fairing 1, nose cone 2, front shroud 3, driving cabin 4 and side plate 5 down, but all adopts smooth excessive mode to design between most of zone, does not have tangible separatrix between each zone.According to the characteristics of former profile, the flow process that the method that application the present invention proposes is carried out the profile correction is following:
Former profile is carried out discretize, mark off the surface mesh of former profile, as shown in Figure 2;
The surface mesh of the initial head dummy of Fig. 2 distributes
Designated key reference mark and coordinate parameters thereof are in this instance, according to the characteristics of head dummy self; Following radome fairing depression points on the appointment left-right symmetric face, nose cone point, protecgulum-driving cabin tie point further extract the coordinate figure of above-mentioned three points as CCP according to profile, be respectively: following radome fairing depression points (38003.77; 319.09), nose cone point (38291.86,413.79); Protecgulum-driving cabin tie point (35487.68; 2362.23), the true origin of above-mentioned coordinate figure is chosen as the central point of three row marshalings, and unit is millimeter.
Confirm the control neighborhood of each CCP; Here the lateral extent of controlling neighborhood is universe, and longitudinal extent is the along slope coordinate (or along slope coordinate of upper boundary values) at along slope coordinate (or along slope coordinate of lower border value) to next reference mark at last reference mark;
Obtain the net point numbering at above-mentioned CCP place through traversal search;
The profile correction at given each reference mark, the profile correction can be given arbitrarily in the boundary value scope here, and literary composition details after detailed correction numerical value and the corresponding correction profile thereof.
Distribution function in its control neighborhood of given each reference mark according to the characteristics of initial head dummy, adopts the cosine distribution function here, so can guarantee to guarantee at least that in the junction, border single order is smooth.
Based on above-mentioned flow process, profile is as follows after the correction that given different key point corrections are obtained:
Specify the depression degree increase by 5% of radome fairing depression points down, (left side, XZ plane is revised profile among the figure, and the right side is former profile) more as shown in Figure 3 of correction profile and the former profile of obtaining.
Specify nose cone length to increase by 5%, (left side, XZ plane is revised profile among the figure, and the right side is former profile) more as shown in Figure 4 of correction profile and the former profile of obtaining.
Specify the nose cone height to increase by 20%, (left side, XZ plane is revised profile among the figure, and the right side is former profile) more as shown in Figure 5 of correction profile and the former profile of obtaining.
Specify protecgulum-driving cabin tie point to validate the car axon, (left side, XZ plane is revised profile among the figure, and the right side is former profile) more as shown in Figure 6 of correction profile and the former profile of obtaining to position increase by 10%.
Revise above-mentioned parameter simultaneously; Promptly descend that the depression degree of radome fairing depression points increases by 5%, nose cone length increases by 5%, the nose cone height increases by 20%, protecgulum-driving cabin tie point is validated the car axon after the position increases by 10%, institute obtains the comparison of correction profile and former profile shown in Fig. 7 a, 7b.(Fig. 7 a is former profile, and Fig. 7 b is revised profile)
Comparison diagram before and after aforementioned profile correction can be found out; After the train head dummy profile modification method that adopts the present invention to propose is revised head dummy; The relevant position of head dummy is effectively revised, and can keep the characteristics and the style of former head dummy fully, in addition; The number of corrected parameter can be selected arbitrarily according to actual conditions, can guarantee to adopt less design parameter to come head dummy is revised.Simultaneously, adopt rational distribution function, can keep the smooth degree of former profile.Therefore, the method that the present invention proposes has characteristics such as thinking is simple, realization is convenient, very is suitable for practical engineering application.
Claims (2)
1. a bullet train head dummy method for designing is characterized in that, comprises the steps:
1) profile of the train head dummy that designed is done discrete processes, form and the profile of the initial head dummy surface mesh of match mutually;
2) select CCP also to confirm the location parameter of this CCP according to the characteristics of head dummy;
3) confirm the control domain of selected CCP, and confirm the shape and the size of this control domain;
4) correction of given selected each CCP, the distribution function in simultaneously given each CCP control neighborhood;
5) according to the correction and the distribution function of each CCP in the control neighborhood of each CCP, calculate the correction that obtains each net point in each CCP control neighborhood;
6) correction is pressed the associated nets lattice point coordinate stack of pointwise of net point position and former profile, thereby obtain revised train profile.
2. the method for claim 1 is characterized in that, said CCP is following radome fairing depression points, nose cone point, protecgulum-driving cabin tie point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110191550A CN102201025B (en) | 2011-07-08 | 2011-07-08 | Design method of head form of high-speed train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110191550A CN102201025B (en) | 2011-07-08 | 2011-07-08 | Design method of head form of high-speed train |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102201025A CN102201025A (en) | 2011-09-28 |
| CN102201025B true CN102201025B (en) | 2012-09-19 |
Family
ID=44661699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110191550A Expired - Fee Related CN102201025B (en) | 2011-07-08 | 2011-07-08 | Design method of head form of high-speed train |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102201025B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106994978B (en) * | 2017-04-28 | 2023-09-15 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Ultra-high speed pipeline train appearance structure of low aerodynamic resistance |
| CN112926131B (en) * | 2021-01-26 | 2022-11-29 | 中车青岛四方机车车辆股份有限公司 | Method and device for determining pneumatic load of vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1634735A (en) * | 2003-12-26 | 2005-07-06 | 中南大学 | Design and processing method for streamline train head shape and structure |
| CN101354729A (en) * | 2007-07-23 | 2009-01-28 | 南车四方机车车辆股份有限公司 | Method for optimizing low pneumatic noise of high-speed train head section longitudinal symmetry plane line |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6915191B2 (en) * | 2003-05-19 | 2005-07-05 | Quantum Engineering, Inc. | Method and system for detecting when an end of train has passed a point |
-
2011
- 2011-07-08 CN CN201110191550A patent/CN102201025B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1634735A (en) * | 2003-12-26 | 2005-07-06 | 中南大学 | Design and processing method for streamline train head shape and structure |
| CN101354729A (en) * | 2007-07-23 | 2009-01-28 | 南车四方机车车辆股份有限公司 | Method for optimizing low pneumatic noise of high-speed train head section longitudinal symmetry plane line |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102201025A (en) | 2011-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102968524B (en) | A kind of modeling method of two-dimentional variable curvature section bar part process model | |
| CN104143018B (en) | Integrated modeling method for hypersonic flight vehicle engine body and internal contraction air inlet channel | |
| CN107067471B (en) | Self-adaptive scanning speed method for improving forming quality of pendant model | |
| Yao et al. | Parametric design and optimization of high speed train nose | |
| CN105550386A (en) | Precast concrete deepening design method based on Revit | |
| CN102682172B (en) | Numerous-parameter optimization design method based on parameter classification for supercritical aerofoil | |
| CN106815435B (en) | Manufacturing method of bionic automobile tail fin shell | |
| CN102201025B (en) | Design method of head form of high-speed train | |
| CN106156383A (en) | A kind of parametrization aerodynamic configuration digital-to-analogue and structured grid automatic generation method | |
| CN110210097A (en) | A kind of metal Roof optimized construction method based on BIM technology | |
| CN110525679B (en) | Hypersonic embedded waverider design method | |
| CN105869212A (en) | Ice shape simplification method | |
| CN103324772B (en) | Integrated design method for single-curve windshield nose | |
| CN103963996A (en) | Transverse pressure gradient controlled ride wave forebody and air inlet channel integrated designing method | |
| CN103324993A (en) | Trajectory optimization method based on multi-aircraft cooperative combat | |
| CN103207923A (en) | Computer aided design method for vertical design of road plane intersection | |
| CN109918760A (en) | Reinforcing bar modeling method based on Revit interoperability | |
| CN103895240A (en) | Covered edge manufacturing technology for carbon fiber composite material vehicle-mounted shelter | |
| Hashimoto et al. | Aerodynamic optimization of near-future high-wing aircraft | |
| CN110104164A (en) | A kind of preceding load for Transonic Wing-air-breathing combination flow control method | |
| CN103412985A (en) | Parametrization design method for trailing edge wedge slit of gas cooling blade | |
| CN103375315B (en) | Method for improving surface modes of air filter and resonator and air filter and resonator | |
| CN202953169U (en) | Novel spoon-shaped blended winglet for civil airplane | |
| CN102582845A (en) | Method for manufacturing aircraft wing body fairing | |
| CN109409020B (en) | Modeling method of hollow fan blade |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120919 Termination date: 20170708 |