CN108763693A - Ship equipment distribution of weight statistical method based on threedimensional model - Google Patents
Ship equipment distribution of weight statistical method based on threedimensional model Download PDFInfo
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Abstract
S1, the ship equipment distribution of weight statistical method based on threedimensional model that the present invention relates to a kind of being based on device model, build the isodensity device model of each equipment, S2, merge acquisition equipment block mold by carrying out boolean to all isodensity device models of full ship；S3, equipment block mold is pressed into required precision, is segmented on captain direction；The weight distribution value and location information that S4, batch signatures are respectively segmented；S5, weight distribution value and location information are depicted as weight distribution curve.The present invention by the way that equipment is equivalent to be equal in weight, the identical homogeneous rule body of genesis analysis length, it realizes and converts weight distribution problem to equivalent volume distribution problem, it relies on threedimensional model effectively to realize that statistics calculates, realizes that the automation of ship equipment longitudinal-weight distribution calculates；Data source is calculated from designing a model, there is no statistics to omit, and uses the method that batch boolean merges to handle hundreds and thousands of complete equipment model combinations for an object, treatment effeciency is substantially improved.
Description
Technical field
The present invention relates to ship overall design technique fields, and in particular to one kind carrying out ship equipment weight based on threedimensional model
Measure distribution statistical method.
Background technology
Hull global vibration calculates the important process project for being to ensure that security of shipping.And full boat-carrying lotus genesis analysis is hull
One of the input element that global vibration calculates.Wherein, how soon ship equipment load is one of the important composition of full ship load weight,
The fast ship equipment distribution of weight that accurately obtains is the realistic problem put in face of designer.
Past in order to obtain the distribution of weight of ship equipment, designer need first according to design drawing to each equipment into
Subitem weight of going counts, then according to deployment scenarios, and distributed area progress approximation by its weight along its longitudinal direction is shared equally each to obtain
It itemizes distribution of weight, is finally superimposed each subitem distribution of weight mean value and approximate obtains ship equipment distribution of weight.Entire workflow
Journey mainly relies on designer's manual working, and long time period, computational accuracy are low, and is easy to omit.
Invention content
The technical problem to be solved in the present invention is in view of the deficiency of the prior art, to provide a kind of based on three-dimensional
The ship equipment distribution of weight statistical method of model, it can quickly, accurately extract distribution of the ship equipment weight along captain direction,
Data are provided for the calculating of hull global vibration.
The present invention is that technical solution used by solving technical problem set forth above is：
A kind of ship equipment distribution of weight statistical method based on threedimensional model, the statistical method include the following steps：
S1, it is based on device model, the isodensity device model of each equipment is built according to formula (1)：
In formula, S is the cross-sectional area of isodensity device model, and ρ is the Unified Device density of full ship equipment, and M is certain equipment
Weight, L are the equipment longitudinal length；
S2, merge acquisition equipment block mold by carrying out boolean to all isodensity device models of full ship；
S3, equipment block mold is pressed into required precision, is segmented on captain direction；
The weight distribution value and location information that S4, batch signatures are respectively segmented：Assuming that the length of i-th of segmentation is Li, measure
Its volume is Vi, then its weight distribution value FiIt can be calculated by formula (2)：
The weight distribution value and location information being respectively segmented according to formula (2) batch signatures；
S5, weight distribution value and location information are depicted as weight distribution curve, by the middle point coordinates x of each segmentationiWith
Fi, coordinate points are retouched into, spline curve is used in combination to connect, you can obtain weight of equipment distribution curve.
In said program, it is segmented into equal length segmentation in the step S3, spacing is chosen according to required precision, point
Segment model length LiSmaller, computational solution precision is higher.
In said program, the step S1 intermediate density device models are cuboid or cylinder.
The beneficial effects of the present invention are：
1. the method for the present invention is by the way that equipment to be equivalent to be equal in weight, the identical homogeneous rule body of genesis analysis length, real
Now convert weight distribution problem to equivalent volume distribution problem, statistics calculates to rely on threedimensional model effectively to realize, realizes
The automation of ship equipment longitudinal-weight distribution calculates, and improves computational efficiency.
2. calculating data source from designing a model, there is no statistics to omit, will be at hundred using the method that batch boolean merges
Thousands of complete equipment model combinations are that an object is handled, and treatment effeciency is substantially improved.
3. can realize that the precision of distributed load is adjusted by adjusting the length of segmentation.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing：
Fig. 1 is the stereogram of certain information combined cabinet in the embodiment of the present invention；
Fig. 2 is the stereogram of the isodensity model of certain information combined cabinet shown in Fig. 1；
Fig. 3 is the stereogram of certain bay section equipment block mold in the embodiment of the present invention；
Fig. 4 is sublevel plan in the embodiment of the present invention；
Fig. 5 is certain bay section weight of equipment scatter chart in the embodiment of the present invention.
Specific implementation mode
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
The specific implementation mode of the present invention.
By taking certain bay section equipment as an example, 26 equipment, the ship proposed by the present invention based on threedimensional model are shared in the bay section
Weight of equipment distribution statistical method includes the following steps：
S1, it is designed a model based on equipment or equipment design drawing, determines weight of equipment M and equipment longitudinal length L, so
The isodensity device model of each equipment is built according to formula (1) afterwards：
In formula, S is the cross-sectional area of isodensity device model, and ρ is the Unified Device density of full ship equipment, and M is certain equipment
Weight, L are the equipment longitudinal length.
By taking certain information combined cabinet as an example, as shown in Figure 1, its machine weight is 250kg, measuring its longitudinal length is
540mm.Assuming that Unified Device density is 1000kg/m3, then according to formula (1), the isodensity model of the equipment can be configured such that
Longitudinal length is 540mm, cross-sectional area 0.463m2Cuboid, as shown in Figure 2.Further isodensity model is taken to be set with original
It is standby contour, it is 1.4m, then the width of cross section is 0.33m.
Aforesaid way is taken to model the indoor each equipment in the bay section cabin successively according to the method described above.
It should be noted that the concrete shape of the isodensity model of each equipment can unrestricted choice as needed, such as length
Cube, cylinder etc. require as long as cross-sectional area meets to calculate.
The present invention directly takes equipment to design a model as data source and participates in statistics calculating, and realization designs a model to be counted with statistics
It is consistent to calculate model, thus can effectively ensure that not omitting for statistics.
S2, pass through 26 isodensity device models progress boolean's merging to being established in step S1, formation equipment entirety mould
Type, equipment block mold axis surveys view are as shown in Figure 3；
S3, equipment block mold is pressed into required precision, is segmented on captain direction；
In the present embodiment, equipment block mold is pressed into mono- grade of 10mm, equal length segmentation is carried out on captain direction, is segmented axis
It is as shown in Figure 4 to measure figure.Using longitudinally split technology is automated, weight distribution value is reduced to from mono- grade traditional of 600mm
Mono- grade of 10mm promotes about 60 times in computational accuracy.
S4, the volume for measuring i-th of segmentation are Vi, then its weight distribution value FiIt can be calculated by formula (2)：
In formula, Li=10mm.
According to weight distribution value and location information that formula (2) batch signatures are respectively segmented, by batch program, along captain
Direction, often moves 10mm, extracts the volume of a segmentation, and records location information and be output on EXCEL, then by segmented body
Product is multiplied by equivalent density, obtains segmentation load weight, finally with segmentation load weight divided by the length 10mm of segmentation to get to load
Lotus Distribution Value.Interception is apart from stem 43.98m to 42.98m, as shown in table 1：
Table 1
S5, weight distribution value and location information are depicted as weight distribution curve, by the middle point coordinates x of each segmentationiWith
Fi, coordinate points are retouched into, spline curve is used in combination to connect, you can obtain weight of equipment distribution curve, as shown in Figure 5.
In conclusion a kind of ship equipment distribution of weight statistical method based on threedimensional model of the present invention, is set in ship
It is reprocessed on the basis of standby model, builds isodensity device model, then pass through a series of technical offices such as model combination, segmentation
Reason, constructs ship equipment load solving model, and design respective algorithms, automatic Ship ' equipment longitudinal-weight Distribution Value.
By this method, the automation for not only realizing the distribution of ship equipment longitudinal-weight calculates, and improves computational efficiency, and can be with
Realize that the precision of distributed load is adjusted by adjusting the length of segmentation.
It should be noted that model characterization is volume element, but different equipment is made of different materials, density
Differ, and the method for the present invention uses isodensity principle, converts weight distribution problem to volume distribution problem, is examined for following
Consider：
(1) for most equipment, longitudinal length, which is compared, can ignore that (such as certain equipment is long from the point of view of the principal dimensions of full ship
0.3m, full captain 70m), concentrfated load can be considered as.And concentrfated load can not be superimposed statistics, it therefore, can only be at one relatively
It shares equally in short length, is indicated with distributed load.In this case no matter equipment is considered as isodensity or non-isodensity, as long as
Total amount remains unchanged, and is all influenced without what in engineering.
(2) for the larger equipment of weight scale, because of the difference of material and shape, consideration can exist at homogeneous rule body
Error, but influence little.Reason is that the larger equipment of weight scale (such as propulsion electric machine) accounts for about full boat-carrying lotus less than 3%,
And it is in irregular shape in this, and the excessively poor equipment of density uniformity is with regard to less.The departure of these equipment compares full boat-carrying
Its influence of lotus is very small, therefore considers into homogeneous rule body to be suitable in engineering.
Therefore, the method for the present invention is feasible using isodensity principle, under the premise of meeting the requirement of engineering calculation, is carried
Efficiency and precision that the distribution of weight of ship equipment calculates are risen.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited in 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 ship equipment distribution of weight statistical method based on threedimensional model, which is characterized in that the statistical method include with
Lower step：
S1, it is based on device model, the isodensity device model of each equipment is built according to formula (1)：
In formula, S is the cross-sectional area of isodensity device model, and ρ is the Unified Device density of full ship equipment, and M is certain weight of equipment,
L is the equipment longitudinal length；
S2, merge acquisition equipment block mold by carrying out boolean to all isodensity device models of full ship；
S3, equipment block mold is pressed into required precision, is segmented on captain direction；
The weight distribution value and location information that S4, batch signatures are respectively segmented：Assuming that the length of i-th of segmentation is Li, measure its volume
For Vi, then its weight distribution value FiIt can be calculated by formula (2)：
The weight distribution value and location information being respectively segmented according to formula (2) batch signatures；
S5, weight distribution value and location information are depicted as weight distribution curve, by the middle point coordinates x of each segmentationiWith Fi, retouch
At coordinate points, spline curve is used in combination to connect, you can to obtain weight of equipment distribution curve.
2. the ship equipment distribution of weight statistical method according to claim 1 based on threedimensional model, which is characterized in that institute
It states in step S3 and is segmented into equal length segmentation, spacing is chosen according to required precision, segmented model length LiIt is smaller, it calculates
As a result precision is higher.
3. the ship equipment distribution of weight statistical method according to claim 1 based on threedimensional model, which is characterized in that institute
It is cuboid or cylinder to state step S1 intermediate density device models.
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| CN201810476985.3A CN108763693B (en) | 2018-05-18 | 2018-05-18 | Ship equipment weight distribution statistical method based on three-dimensional model |
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| CN201810476985.3A CN108763693B (en) | 2018-05-18 | 2018-05-18 | Ship equipment weight distribution statistical method based on three-dimensional model |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112407184A (en) * | 2020-11-30 | 2021-02-26 | 江南造船(集团)有限责任公司 | Method and system for calculating weight gravity center distribution of ship |
| CN113697059A (en) * | 2021-08-11 | 2021-11-26 | 中国舰船研究设计中心 | Flexible design method for section connection of surface ship |
| CN113697059B (en) * | 2021-08-11 | 2024-05-28 | 中国舰船研究设计中心 | Flexible design method for sectional connection of water surface ship |
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| 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 |
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| US20050052453A1 (en) * | 2003-09-08 | 2005-03-10 | Government Of The United States Of America As Represented By The Secretary Of The Navy | Technique for modeling shipboard systems and equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112407184A (en) * | 2020-11-30 | 2021-02-26 | 江南造船(集团)有限责任公司 | Method and system for calculating weight gravity center distribution of ship |
| CN112407184B (en) * | 2020-11-30 | 2022-04-12 | 江南造船(集团)有限责任公司 | Method and system for calculating weight gravity center distribution of ship |
| CN113697059A (en) * | 2021-08-11 | 2021-11-26 | 中国舰船研究设计中心 | Flexible design method for section connection of surface ship |
| CN113697059B (en) * | 2021-08-11 | 2024-05-28 | 中国舰船研究设计中心 | Flexible design method for sectional connection of water surface ship |
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| CN108763693B (en) | 2022-07-01 |
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