CN108959695A - Ship pipeline system weight distribution statistical method based on threedimensional model - Google Patents

Ship pipeline system weight distribution statistical method based on threedimensional model Download PDF

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CN108959695A
CN108959695A CN201810477000.9A CN201810477000A CN108959695A CN 108959695 A CN108959695 A CN 108959695A CN 201810477000 A CN201810477000 A CN 201810477000A CN 108959695 A CN108959695 A CN 108959695A
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pipe
model
line system
weight distribution
isodensity
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CN108959695B (en
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凌昊
肖伟
柏铁朝
周亮
万鹏
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China Ship Development and Design Centre
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China Ship Development and Design Centre
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    • G06F30/10—Geometric CAD
    • G06F30/15—Vehicle, aircraft or watercraft design
    • 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

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Abstract

The present invention relates to a kind of ship pipeline system weight distribution statistical method based on threedimensional model, the isodensity pipe-line system of S1, all kinds of pipe-line systems of building, S2, to same equivalent density ρIt is equivalentPipe-line system model be filled, batch boolean merges, and obtains isodensity pipe-line system pooled model, S3, assume that full ship has the pipe-line system of N number of equivalent density, N number of isodensity pipe-line system pooled model can be obtained by S2；S4, isodensity pipe-line system pooled model is pressed into required precision, is segmented along captain direction, form segmented model；The weight distribution value and location information that S5, batch signatures are respectively segmented, S6, are depicted as weight distribution curve for weight distribution value and location information.The present invention constructs pipe-line system load solving model by model combination, separation, and design respective algorithms, automatic to calculate pipe-line system longitudinal-weight Distribution Value, the automation for not only realizing the distribution of pipe-line system longitudinal-weight calculates, and greatly improves computational accuracy.

Description

Ship pipeline system weight distribution statistical method based on threedimensional model
Technical field
The present invention relates to ship overall design technique fields, and in particular to one kind carries out ship pipeline system based on threedimensional model System distribution of weight statistical method.
Background technique
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, ship pipeline system is one of important composition of load weight, how quickly quasi- True acquisition pipe-line system distribution of weight is the realistic problem put in face of designer.
Past, designer needed first according to design drawing to each segmentation tube coupling in order to obtain the distribution of weight of pipe-line system And pipeline fittings carry out subitem weight statistics, then according to deployment scenarios, its weight is approximate along its longitudinal distributed area progress It shares equally to obtain each subitem distribution of weight, is finally superimposed the next approximate pipe-line system weight that obtains of each subitem distribution of weight mean value and divides Cloth.Entire workflow mainly relies on designer's manual working, and long period, computational accuracy are low, and is easy to omit.
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 based on three-dimensional The ship pipeline system weight distribution statistical method of model, it can quickly, accurately extract hull pipe-line system weight along captain The distribution in direction provides data for the calculating of hull global vibration.
The present invention is technical solution used by solving technical problem set forth above are as follows:
A kind of ship pipeline system weight distribution statistical method based on threedimensional model, which includes following step It is rapid:
S1, the isodensity pipe-line system that all kinds of pipe-line systems are constructed according to formula (1):
In formula, ρMediumFor the density of medium in pipe (such as water, oil, gas), D is tube outer diameter, and t is pipe wall thickness, ρPipeFor Pipe density, ρIt is equivalentFor equivalent density；
S2, by with same equivalent density ρIt is equivalentPipe-line system model be filled, and carry out batch boolean's conjunction And to it obtain isodensity pipe-line system pooled model；
S3, assume the pipe-line system for sharing N number of equivalent density through analyzing full ship, can be obtained by the processing of S2 N number of etc. Density pipe-line system pooled model；
S4, isodensity pipe-line system pooled model is pressed into required precision, is segmented along captain direction, form segmentation mould Type；
The weight distribution value and location information that S5, batch signatures are respectively segmented: j-th of isodensity pipe-line system pooled model is set Segmented model length along i-th of segmentation of captain direction segmentation is Li, measure its volume be Vi, then its weight distribution value FjiIt can It is calculated by formula (2):
The weight distribution value F for i-th of segmentation that then full ship pipe-line system is divided along captain directioniIt can be counted by formula (3) It calculates:
The weight distribution value and location information being respectively segmented according to formula (2), formula (3) batch signatures；
S6, weight distribution value and location information are depicted as weight distribution curve.
In above scheme, step S2-S4 is carried out on the basis of circuit design model, saves the workload modeled again.
In above scheme, it is segmented into equal part in the step S3, spacing is chosen according to required precision, segmented model Length LiSmaller, computational solution precision is higher.
The beneficial effects of the present invention are:
The method of the present invention uses the principle of representative section density, realizes the mould to pipeline material and its internal oil, gas and water Typeization expression, converts volume distribution problem for weight distribution problem, so that threedimensional model is relied on effectively to realize that statistics calculates, energy It is enough substantially to shorten the ship pipeline system weight distribution statistics time；Using batch boolean's folding, realize root canal sections up to a hundred Model combination is that an object is handled, and treatment effeciency is substantially improved, and guarantees that statistics is not omitted；It can be by adjusting segmentation Length realizes that the precision of distributed load is adjusted, to realize the promotion of pipe-line system distribution of weight statistical accuracy.
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 the schematic diagram of the method for the present invention building isodensity pipe-line system；
Fig. 2 is the isodensity pooled model that the embodiment of the present invention is merged by batch boolean；
Fig. 3 is the model after the segmentation of water pipe system isodensity pooled model of the embodiment of the present invention；
Fig. 4 is that the embodiment of the present invention is bent to the pipe-line system load distribution between bow 12m at stem 11m Line.
In figure: 10, water pipe system isodensity pooled model；20, tubing system isodensity pooled model.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail A specific embodiment of the invention.
By taking certain ship pipeline system as an example, the two class pipeline of ship: water pipe system and tubing system.Base proposed by the present invention In threedimensional model ship pipeline system weight distribution statistical method the following steps are included:
S1, the isodensity pipe-line system for constructing two pipe-line systems in CATIA according to formula (1):
In formula, ρMediumFor the density of medium in pipe (water, oil), D is tube outer diameter, and t is pipe wall thickness, ρPipeIt is close for pipe Degree, ρIt is equivalentFor equivalent density.Cross-sectional schematic 1 is as shown.
For water pipe system, pipeline material is brass tube, density 8500kg/m3；And water density is 1000kg/ in pipe m3；Nozzle outer diameter is 90mm, wall thickness 3.5mm, calculates to obtain equivalent density ρ according to formula (1)It is equivalent=2121kg/m3。
For tubing system, pipeline material is brass tube, density 8500kg/m3；And oil density is 850kg/ in pipe m3；Nozzle outer diameter is 90mm, wall thickness 3mm, calculates to obtain equivalent density ρ according to formula (1)It is equivalent=1836kg/m3。
Therefore, the equivalent density ρ of water pipe systemIt is equivalent=2121kg/m3；The equivalent density ρ of tubing systemIt is equivalent=1836kg/ m3。
S2, by the model with water pipe system and tubing system is filled respectively and batch boolean merge, from And obtain water pipe system isodensity pooled model 10 and tubing system isodensity pooled model 20.Present embodiment assumes that water pipe is on a left side Astarboard, water pipe is identical as the geometric shape of oil pipe for the side of a ship, oil pipe, as shown in Fig. 2, pipe section is solid after filling.
S3, the present embodiment share the pipe-line system of 2 equivalent densities, obtain 2 isodensity pipelines altogether by the processing of S2 System pooled model: water pipe system isodensity pooled model 10 and tubing system isodensity pooled model 20.
S4, according to required precision by 20 edge of water pipe system isodensity pooled model 10 and tubing system isodensity pooled model It is segmented on captain direction by mono- grade of 10mm, at stem 11m, after water pipe system isodensity pooled model 10 is segmented Model is as shown in figure 3, similarly oil pipe.
Step S2-S4 is carried out on the basis of circuit design model, eliminates the workload modeled again, in addition, directly adopting Take design a model as data source participate in statistics calculate, realization design a model it is consistent with mathematical models, thus can be effective Guarantee not omitting for statistics.
S5, through measuring, at stem 11m, water pipe system segmented model volume is 0.00051m3, it is contemplated that its etc. Effect density is 2121kg/m3, then its weight distribution value FjiIt can be calculated by formula (2):
The tubing weight Distribution Value for similarly calculating equivalent locations is 93.6702kg/m.
According to formula (3), at stem 11m, the weight distribution value of full pipe-line system is 201.8806kg/m.
By batch program, along captain direction, every mobile 10mm extracts the volume of a segmentation, and records position Information is simultaneously output on EXCEL, then will be segmented volume multiplied by equivalent density, segmentation load weight is obtained, finally with segmentation load Weight arrives load Distribution Value divided by the length 10mm of segmentation.In the present embodiment, be calculated at stem 11m to away from Pipe-line system load Distribution Value between disembarkation head 12m, as shown in table 1 below.
Table 1
S6, weight distribution value and location information are depicted as weight distribution curve, as shown in Figure 4.
In conclusion the method for the present invention is on the basis of pipeline system design model, by being merged to model, separated place Reason, constructs pipe-line system load solving model, and design respective algorithms, automatic to calculate pipe-line system longitudinal-weight Distribution Value. By this method, the automation for not only realizing the distribution of pipe-line system longitudinal-weight is calculated, and greatly improves computational accuracy.
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 ship pipeline system weight distribution statistical method based on threedimensional model, which is characterized in that the statistical method packet Include following steps:
S1, the isodensity pipe-line system that all kinds of pipe-line systems are constructed according to formula (1):
In formula, ρMediumFor the density of medium in pipe (such as water, oil, gas), D is tube outer diameter, and t is pipe wall thickness, ρPipeFor pipe Density, ρIt is equivalentFor equivalent density；
S2, by with same equivalent density ρIt is equivalentPipe-line system model be filled, and carry out batch boolean's merging, To obtain isodensity pipe-line system pooled model；
S3, assume the pipe-line system for sharing N number of equivalent density through analyzing full ship, N number of isodensity can be obtained by the processing of S2 Pipe-line system pooled model；
S4, isodensity pipe-line system pooled model is pressed into required precision, is segmented along captain direction, form segmented model；
The weight distribution value and location information that S5, batch signatures are respectively segmented: j-th of isodensity pipe-line system pooled model is set along ship The segmented model length of i-th of segmentation of length direction segmentation is Li, measure its volume be Vi, then its weight distribution value FjiIt can pass through Formula (2) calculates:
The weight distribution value F for i-th of segmentation that then full ship pipe-line system is divided along captain directioniIt can be calculated by formula (3):
The weight distribution value and location information being respectively segmented according to formula (2), formula (3) batch signatures；
S6, weight distribution value and location information are depicted as weight distribution curve.
2. the ship pipeline system weight distribution statistical method according to claim 1 based on threedimensional model, feature exist In step S2-S4 is carried out on the basis of circuit design model, saves the workload modeled again.
3. the ship pipeline system weight distribution statistical method according to claim 1 based on threedimensional model, feature exist In being segmented into equal part in the step S3, spacing is chosen according to required precision, segmented model length LiIt is smaller, it calculates As a result precision is higher.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110031073A (en) * 2019-03-11 2019-07-19 新兴河北工程技术有限公司 Multi-way pipe fitting weight confirming method, device, computer equipment and storage medium
CN111723432A (en) * 2020-05-21 2020-09-29 西安交通大学 Method for rapidly extracting accurate oil mass CAD model of aircraft oil tank

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104504201A (en) * 2014-12-22 2015-04-08 大连理工大学 Automatic design method for ship segmental hoisting scheme
CN105022882A (en) * 2015-07-23 2015-11-04 大连海事大学 Ship still water shearing force and bending moment calculating method
CN105447909A (en) * 2015-12-29 2016-03-30 大连陆海科技股份有限公司 Method and system for establishing user-defined three-dimensional ship model

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104504201A (en) * 2014-12-22 2015-04-08 大连理工大学 Automatic design method for ship segmental hoisting scheme
CN105022882A (en) * 2015-07-23 2015-11-04 大连海事大学 Ship still water shearing force and bending moment calculating method
CN105447909A (en) * 2015-12-29 2016-03-30 大连陆海科技股份有限公司 Method and system for establishing user-defined three-dimensional ship model

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110031073A (en) * 2019-03-11 2019-07-19 新兴河北工程技术有限公司 Multi-way pipe fitting weight confirming method, device, computer equipment and storage medium
CN110031073B (en) * 2019-03-11 2020-11-17 新兴河北工程技术有限公司 Method and device for determining weight of multi-way pipe fitting, computer equipment and storage medium
CN111723432A (en) * 2020-05-21 2020-09-29 西安交通大学 Method for rapidly extracting accurate oil mass CAD model of aircraft oil tank
CN111723432B (en) * 2020-05-21 2023-03-28 西安交通大学 Method for rapidly extracting accurate oil mass CAD model of aircraft oil tank

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