CN110377992A - A kind of method in Ship ' equipment threedimensional model general arrangement occupy-place section - Google Patents
A kind of method in Ship ' equipment threedimensional model general arrangement occupy-place section Download PDFInfo
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- CN110377992A CN110377992A CN201910615564.9A CN201910615564A CN110377992A CN 110377992 A CN110377992 A CN 110377992A CN 201910615564 A CN201910615564 A CN 201910615564A CN 110377992 A CN110377992 A CN 110377992A
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Abstract
The present invention relates to a kind of methods in Ship ' equipment threedimensional model general arrangement occupy-place section, it first proposed the method that direction vector is calculated based on coordinate transform, by the vectorial coordinate in equipment local coordinate system for calculating ship length direction, extract the extremal features of model in this direction, then by way of creating global coordinate system origin in equipment local coordinate system, the coordinate of extreme value is obtained using ranging means, it avoids data type not knowing to lead to the case where reporting an error when directly measuring extremal features, ensure that batch-automated exploitativeness.The method of the present invention can calculate equipment in global coordinate system along ship length or the extreme value of either direction, export occupy-place section of the equipment in the ship's General arrangement coordinate system.This method versatility is good, can automate implementation, thus the workload of equipment manual measurement one by one when designer's acquisition placement information is greatly reduced.
Description
Technical field
The present invention relates to ship Three-dimensional Design Technique fields, and in particular to a kind of Ship ' equipment threedimensional model general arrangement
The method in occupy-place section.
Background technique
Equipment arrangement is the important content during Ship Design.Three dimensional design provides strong for equipment complex arrangement
Solution, but there are still some problems in terms of equipment placement information acquisition, such as:
The space layout of equipment is relatively more abstract, and still three-dimensional modeling data amount can be clearly expressed in three-dimensional virtual environment
It is huge, and rely on the carriers such as computer or CD, it is difficult to carry in daily communication and real-time exhibition.It is three-dimensional at present to deliver
Relevant criterion studying, industry still based on two-dimensional model, design traditionally, data interaction depends on paper carrier more
Table or numerical value.
In institute, factory information exchange level, due to the huge secrecy of military industry in addition examination & approval of model data amount etc., model
Transmission flow is longer, and time cost is larger, and data communication mode is more likely to provide inventory or numerical value.Further, since institute, factory is double
Square structure tree organizational form is different, and manufacturer is difficult to find correlation model from top to bottom from structure tree, and generally requires design institute
Rib position section locating for model is provided to navigate to respective objects.
Therefore, position information and the occupy-place section that each equipment is extracted based on threedimensional model, in design information interaction side
There is biggish demand in face.Also, it is checked based on data information and does not have to open huge threedimensional model, also had to a certain extent
Application background.
Currently, the occupy-place section based on threedimensional model extract equipment is more difficult, show:
The primary function of Three-dimensional Design Software can only export position of centre of gravity or the assembly origin position of ship equipment threedimensional model
It sets, can not further express the geometric shape element of equipment itself, such as the occupy-place section along ship length direction.With diesel engine
For, principal dimensions is larger, along captain direction cross over multiple rib positions, with center of gravity or assembly origin as " point " come describe its
Space occupy-place information in general arrangement is simultaneously insufficient.For this purpose, designer usually requires in the three-dimensional model, artificial preference pattern
Boundary, and manual measurement and coordinate of the boundary in general arrangement is recorded to state equipment occupy-place section.Ship equipment quantity is many
More, outer shape and angle of assembling are also different, and the process workload is huge, take time and effort.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the deficiency of the prior art, providing a kind of Ship '
The method in equipment threedimensional model general arrangement occupy-place section, this method can calculate equipment in global coordinate system along ship length or
The extreme value of either direction exports occupy-place section of the equipment in the ship's General arrangement coordinate system；This method versatility is good, can be automatic
Change and implement, thus the workload of equipment manual measurement one by one when designer's acquisition placement information is greatly reduced.
The present invention is technical solution used by solving technical problem set forth above are as follows:
A kind of method in Ship ' equipment threedimensional model general arrangement occupy-place section, method includes the following steps:
Step S1, direction vector coordinate is calculated:
If global coordinate system (the equipment local coordinate system before assembly) is Oxyz, the equipment local coordinate system after assembly is O '
x′y′z′.By taking captain direction as an example, it is extreme value of the extract equipment model in captain direction, first has to O ' x ' y ' z ' after calculating assembly
In with captain direction in Oxyz(1,0,0) direction vector in the same direction
In three-dimensional trim designs, before device model assembly, local coordinate system is completely coincident with global coordinate system.Assembly
After the completion, device model records its assembly information in global coordinate system by way of assembling matrix.If assembly matrix is
R can be read in software, and expression-form is as follows:
Wherein,For coordinate spin matrix,To sit
Mark offset vector.
If in Oxyz, point P (x, y, z) and vectorAfter crossing assembly, the coordinate in Oxyz becomes P respectively1
(x1,y1,z1),It is respectively P ' (x ', y ', z ') in the assembly middle coordinate of transformed coordinate system O ' x ' y ' z ',Then from coordinate conversion relation:
So, it is known that transformed vectorVector before then convertingMeet:
Due in O ' x ' y ' z 'In OxyzCorresponding coordinate values are consistent, by (3) formula,
It enablesObtain the corresponding direction vector in captain direction:
Similarly, it enablesObtain the corresponding direction vector in beam direction:
Similarly, it enablesObtain the corresponding direction vector in beam direction:
The method that direction vector is calculated based on coordinate transform is proposed in the step, by calculating ship length direction
Vectorial coordinate in equipment local coordinate system extracts the extremal features of model in this direction.
Step S2, extract equipment model edgeThe extreme value geometrical characteristic in direction:
In device model coordinate system, using device model outer surface as object, outer surface edge is extractedDirection
Maximum geometrical characteristic Fmax and minimum geometrical characteristic Fmin.
Step S3, the coordinate of Fmax and Fmin is measured:
Since device model shape and angle of assembling are different, the Extremal Type of extraction may be point, line, surface or all kinds of
The combination of feature, data type exist uncertain, lead to be likely to occur type mismatch using measurement coordinate in code reporting an error.
To guarantee versatility, the coordinate of extreme value geometrical characteristic is calculated from by the way of using ranging.
Firstly, calculating the point P ' being overlapped in device coordinate system O ' x ' y ' z ' with the origin O (0,0,0) of global coordinate system Oxyz
(x ', y ', z '), by (1) Shi Ke get:
Since the corresponding coordinate values of P (x, y, z) are consistent in the middle P ' of O ' x ' y ' z ' (x ', y ', z ') and Oxyz, by (7)
Formula enables P1(x1,y1,z1)=O (0,0,0), obtains:
Coordinate calculate after the completion of, in device coordinate system create P ' (x ', y ', z '), and measure itsSide
To the distance component with above-mentioned extreme value geometrical characteristic Fmax, Fmin, the coordinate Xmax and Xmin of extreme value geometrical characteristic are obtained, then
The equipment is in general arrangementThe occupy-place section in direction is (Xmin, Xmax), then coordinate information is converted to accordingly
Rib position information more meets shipbuilding industry design habit.The step is former by creating global coordinate system in equipment local coordinate system
The mode of point obtains the coordinate of extreme value using ranging means, avoids data type and does not know to cause directly to measure extremal features
When the case where reporting an error, ensure that batch-automated exploitativeness.
As a result, can get arbitrary shape, arbitrary load angle equipment threedimensional model in general arrangement captain, the beam,
Vertical maximum and minimum coordinate, i.e. occupy-place section of the device model in general arrangement.
The beneficial effects of the present invention are:
1. the invention proposes a kind of total cloth of Ship ' equipment threedimensional model in such a way that vector calculating, extreme value are extracted
The method for setting occupy-place section, this method can extract arbitrary equipment threedimensional model in general arrangement along ship length and width, vertical or any side
To maximum value minimum, output equipment occupy-place section facilitates designer to express general arrangement scheme in a manner of numerical value
Assessment and check arrangement result.This method is not influenced by equipment locally fine point coordinate system, equipment assembly placement angle, versatility
It is good.
It, can batch 2. the method for the present invention solves the problems, such as that extreme value geometrical characteristic data type is uncertain by distance measuring method
Automation is implemented, to significantly reduce designer's workload of equipment manual measurement one by one in three dimensions.
3. the extreme coordinates along directions such as lengths obtained by this method, can create a cube envelope body Model, use
In volume occupy-place modeling, model simplifying other purposes.
4. the method for the present invention is used for Ship ' equipment threedimensional model general arrangement occupy-place section, by equipment three dimensional arrangement to sit
The form output for marking data (or being converted to rib position information), is checked convenient for design information interaction and result.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is certain bunk beds model schematic in general arrangement of the embodiment of the present invention；
Fig. 2 is that the embodiment of the present invention reads device model assembly matrix schematic diagram；
Fig. 3 is that the embodiment of the present invention calculates vectorSchematic diagram；
Fig. 4 is that the embodiment of the present invention extracts edgeExtreme value geometrical characteristic schematic diagram；
Fig. 5 is that the embodiment of the present invention creates point P ' (x ', y ', z ') schematic diagram in device model.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, with reference to the accompanying drawing, with total cloth
Occupy-place interval computation is carried out for certain the bunk beds model set illustrates a specific embodiment of the invention.
The first step loads the bunk beds model in general arrangement, the equipment modeling local coordinate system O ' x ' y ' after assembling
Z ' and global coordinate system Oxyz are as shown in Figure 1.
Second step reads assembly matrix of the equipment in global coordinate system, obtains spin matrix T and offset vector
As shown in Figure 2.
Third step, by (4) formula in textIt calculates under O ' x ' y ' z ' coordinate system along ship
The vector of length directionAs shown in Figure 3.
4th step, in device model, extract equipment model outer surface existsThe maximum geometry in direction is special
FMax and minimum geometrical characteristic Fmin is levied, as shown in Figure 4.
5th step is found out in O ' x ' y ' z ' coordinate system, the point being overlapped with global coordinate system origin O by (8) formula in textThen measurement the 4th step obtained FMax and Fmin with P 'On direction
Distance component obtains corresponding coordinate value Xmax and Xmin, then the bunk beds captain direction occupy-place section be (Xmin,
Xmax)。
6th step, according to the method described above, in (4) formula withFor input, it can equally acquire and set
Standby model is along the occupy-place interval coordinate (Ymin, Ymax) in the beam, vertical direction and (Zmin, Zmax).
7th step presses above-mentioned generalization process to each device model, can realize full ship equipment using secondary development code
The automatic calculating in model general arrangement occupy-place section exports, and converts corresponding rib position information for coordinate value.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (3)
1. a kind of method in Ship ' equipment threedimensional model general arrangement occupy-place section, which is characterized in that this method includes following
Step:
Step S1, it calculates direction vector coordinate: setting global coordinate system (the equipment local coordinate system before assembly) as Oxyz, after assembly
Equipment local coordinate system be O ' x ' y ' z ', calculate after assembly first in O ' x ' y ' z ' with captain direction in Oxyz
Direction vector in the same directionIn three-dimensional trim designs, before device model assembly, local coordinate system and global seat
Mark system is completely coincident, and after the assembly is completed, device model records its assembly in global coordinate system by way of assembling matrix
Information can be read in software if assembly matrix is R；Then the beam, vertical or either direction pair are found out by the same method
It answers
Step S2, extract equipment model edgeThe extreme value geometrical characteristic in direction: in device model coordinate system, to set
Standby model outer surface is object, extracts outer surface edgeThe maximum geometrical characteristic Fmax and minimum in direction are several
What feature Fmin；
Step S3, it measures the coordinate of Fmax and Fmin: to guarantee versatility, it is special that extreme value geometry being calculated from by the way of using ranging
The coordinate of sign.
2. the method in Ship ' equipment threedimensional model general arrangement occupy-place section according to claim 1, which is characterized in that
In step S1, the calculation method of direction vector coordinate is as follows:
It is extreme value of the extract equipment model in captain direction by taking captain direction as an example, first has to after calculating is assembled in O ' x ' y ' z '
With captain direction in OxyzDirection vector in the same directionIt is described assembly matrix be R expression-form such as
Under:
Wherein,For coordinate spin matrix,For coordinate shift
Vector；
If in Oxyz, point P (x, y, z) and vectorAfter crossing assembly, the coordinate in Oxyz becomes P respectively1(x1,
y1,z1),It is respectively P ' (x ', y ', z ') in the assembly middle coordinate of transformed coordinate system O ' x ' y ' z ',Then from coordinate conversion relation:
So, it is known that transformed vectorVector before then convertingMeet:
Due in O ' x ' y ' z 'In OxyzCorresponding coordinate values are consistent, by (3) formula, enableObtain the corresponding direction vector in captain direction:
Similarly, it enablesObtain the corresponding direction vector in beam direction:
Similarly, it enablesObtain the corresponding direction vector in beam direction:
3. the method in Ship ' equipment threedimensional model general arrangement occupy-place section according to claim 2, which is characterized in that
In step S3, the coordinate of extreme value geometrical characteristic is calculated from by the way of using ranging, and the specific method is as follows:
Firstly, calculate be overlapped in device coordinate system O ' x ' y ' z ' with the origin O (0,0,0) of global coordinate system Oxyz point P ' (x ',
Y ', z '), by (1) Shi Ke get:
Since the corresponding coordinate values of P (x, y, z) are consistent in the middle P ' of O ' x ' y ' z ' (x ', y ', z ') and Oxyz, by (7) formula, P is enabled1
(x1,y1,z1)=O (0,0,0), obtains:
Coordinate calculate after the completion of, in device coordinate system create P ' (x ', y ', z '), and measure itsDirection with
The distance component of above-mentioned extreme value geometrical characteristic Fmax, Fmin obtains the coordinate Xmax and Xmin of extreme value geometrical characteristic, then the equipment
In general arrangementThe occupy-place section in direction is (Xmin, Xmax), then coordinate information is converted to corresponding rib position and is believed
Breath more meets shipbuilding industry design habit.
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| CN201910615564.9A CN110377992B (en) | 2019-07-09 | 2019-07-09 | Method for calculating total layout occupation area of three-dimensional model of ship equipment |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160132622A1 (en) * | 2013-05-27 | 2016-05-12 | Airbus Group India Private Limited | Conversion of geometric entities of 1d elements in a fem from a source fea tool format to a destination fea tool format |
| CN106871880A (en) * | 2017-01-05 | 2017-06-20 | 迈瑞菲（北京）科技发展有限公司 | The method that rib position, half-breadth and height carry out ship closure is calculated using three-dimensional coordinate |
| CN108304687A (en) * | 2018-04-26 | 2018-07-20 | 大连理工大学 | A method of prediction thin-wall complicated curved surface revolving meber turnery processing deformation |
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- 2019-07-09 CN CN201910615564.9A patent/CN110377992B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160132622A1 (en) * | 2013-05-27 | 2016-05-12 | Airbus Group India Private Limited | Conversion of geometric entities of 1d elements in a fem from a source fea tool format to a destination fea tool format |
| CN106871880A (en) * | 2017-01-05 | 2017-06-20 | 迈瑞菲（北京）科技发展有限公司 | The method that rib position, half-breadth and height carry out ship closure is calculated using three-dimensional coordinate |
| CN108304687A (en) * | 2018-04-26 | 2018-07-20 | 大连理工大学 | A method of prediction thin-wall complicated curved surface revolving meber turnery processing deformation |
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