CN110135115A - A kind of two dimension and three-dimensional floating ice field or trash ice field generation method - Google Patents
A kind of two dimension and three-dimensional floating ice field or trash ice field generation method Download PDFInfo
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- CN110135115A CN110135115A CN201910496432.9A CN201910496432A CN110135115A CN 110135115 A CN110135115 A CN 110135115A CN 201910496432 A CN201910496432 A CN 201910496432A CN 110135115 A CN110135115 A CN 110135115A
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Abstract
The invention belongs to floating ice or trash ice drag evaluation fields, and in particular to a kind of two dimension and three-dimensional floating ice field or trash ice field generation method, by the geometric parameter for determining plane floating ice or trash ice field；Sea ice substance point is uniformly distributed in floating ice or trash ice field；The N number of dimension promise point of random distribution in floating ice or trash ice field；FROTRAN language is based on according to the two positional relationship, and sea ice substance point is divided into N number of region；Floating ice or the trash ice field comprising N number of floating ice or rubble ice to form plane difference closeness are approached according to area；Floating ice or the trash ice field comprising N number of floating ice or rubble ice according to the given three-dimensional different closenesses of thickness generating random number.The present invention is applied to promise function method is tieed up in the dynamics of near field, it realizes in given area and is randomly divided into limited quantity floating ice or rubble ice, floating ice or the trash ice field that different closenesses are formed using area approach method form the floating ice or rubble ice of different-thickness in given range based on thickness random number.It is formed closer in actual floating ice or trash ice generation method.
Description
Technical field
The invention belongs to floating ice or trash ice drag evaluation fields, and in particular to a kind of two dimension and three-dimensional floating ice field or trash ice field
Generation method.
Background technique
Floating/trash ice condition that certain natural conditions are formed and the trash ice condition that the navigation channel after ice breaker is opened up is formed are
Common situation in arctic navigation.This floating/trash ice operating condition directly interacts with the trash ice of fritter or relatively large floating ice, shape
At collision, overturning and along relative motions such as the slidings of hull, relatively large trash ice once in a while also can be above existing with continuing to be crushed
As the load to ship's navigation can be generated.
The Voronoi diagram that promise split plot design generates is tieed up, initial concept can trace back to 164 years works delivered in Descartes
(metaphysics " it proposes the solar system and is made of whirlpool, entire space can be decomposed into multiple whirlpools (domain), each sharp whirlpool
Around a center, for Descartes in description solar system anabolic process, spatial decomposition is the concept of convex domain set because each
The significance that a scientific domain has, and individually be extracted out, and different addresses is had been assigned in different field,
Field of biology is referred to as Medial-Axis Transformation, and Thiessen polygon is referred to as in meteorological, geometry.Currently, by it using map
On path planning, coordinate arrangement, the fields such as joint deployment, house division in military affairs.
And in numerical simulation, it is ensured that ship floats/trash ice navigation channel generation in the accurate simulation of floating/trash ice Fairway navigation
Method is one of the precondition to conduct a research and difficult point.For accurate simulation, there is an urgent need to one kind to float/trash ice field generation
Method.Currently about ship in the research of floating/broken ice navigation, the generation method of floating/trash ice is in the presence of many unreasonable ground
Just, it is relatively simple that trash ice model over-simplification, ice cube shaped in floating/trash ice region are mainly reflected in, to influence numerical forecast
As a result.And external ship trial discovery, shape, ice cube size, the closeness of sea ice have ship ice formation ship performance very big
Influence.Accordingly, it is considered to which the thought of Voronoi diagram is applied to polar region ice formation, three-dimensional floating/trash ice generation method is carried out.This
Invention realizes that the three-dimensional based on Voronoi diagram floats/trash ice generation method by near field dynamic method.What the generation method was formed
Sea ice shape can make it have great importance in polar region field the features such as random thickness, accurate closeness
Summary of the invention
The object of the present invention is to provide a kind of two-dimentional floating ice field or trash ice field generation methods.
The object of the present invention is achieved like this:
A kind of two dimension floating ice field or trash ice field generation method, comprising the following steps:
Step 1: the quantity N of the two-dimensional geometry parameter and ice cube of setting plane floating ice field or trash ice field overall region；
Step 2: sea ice substance point is uniformly distributed in plane floating ice field or trash ice field overall region；
Step 3: the N number of dimension promise point of random distribution in plane floating ice field or trash ice field overall region；
Step 4: marking off N number of floating ice or trash ice region, each floating ice in plane floating ice field or trash ice field overall region
It or include a dimension promise point in trash ice region, and all sea ice substance points for including are to the region in each floating ice or trash ice region
The distance of Nei Weinuo point is less than the distance to other regions Nei Weinuo point；
Step 5: according to floating ice or the plane dense degree in trash ice region in plane floating ice field or trash ice field overall region, using
Area approach method generates floe or rubble ice in each floating ice or trash ice region, obtains containing N number of floe or trash ice
The two-dimentional floating ice field of block or trash ice field.
The object of the invention is also to provide a kind of three-dimensional floating ice field or trash ice field generation methods.
The object of the present invention is achieved like this:
A kind of three-dimensional floating ice field or trash ice field generation method, comprising the following steps:
Step 1: the quantity N of the two-dimensional geometry parameter and ice cube of setting plane floating ice field or trash ice field overall region；
Step 2: sea ice substance point is uniformly distributed in plane floating ice field or trash ice field overall region；
Step 3: the N number of dimension promise point of random distribution in plane floating ice field or trash ice field overall region；
Step 4: marking off N number of floating ice or trash ice region, each floating ice in plane floating ice field or trash ice field overall region
It or include a dimension promise point in trash ice region, and all sea ice substance points for including are to the region in each floating ice or trash ice region
The distance of Nei Weinuo point is less than the distance to other regions Nei Weinuo point；
Step 5: according to floating ice or the plane dense degree in trash ice region in plane floating ice field or trash ice field overall region, using
Area approach method generates floe or rubble ice in each floating ice or trash ice region, obtains containing N number of floe or trash ice
The two-dimentional floating ice field of block or trash ice field；
Step 6: the thickness range of setting floating ice or trash ice contains N number of floe or trash ice according to thickness generating random number
The three-dimensional floating ice of block or trash ice field.
The beneficial effects of the present invention are: compiler is applied to promise function method is tieed up in the dynamics of near field, and is realized given
It is randomly divided into limited quantity in region and floats/rubble ice, forms floating/trash ice field of different closenesses using area approach method,
Floating/rubble ice of different-thickness in given range is formed based on thickness random number.It is formed and is generated closer in actual floating/trash ice
Method.
Detailed description of the invention
Fig. 1 is a kind of three-dimensional floating ice field or trash ice field generation method flow chart.
Fig. 2 is random thickness effect picture of the invention.
Fig. 3 is random thickness detail effect picture of the invention.
Fig. 4 is the effect picture of 50% closeness floating ice field of one kind or trash ice field that the present invention generates.
Fig. 5 is the effect picture of 50% closeness floating ice field of another kind or trash ice field that the present invention generates.
Fig. 6 is the effect picture of 60% closeness floating ice field of one kind or trash ice field that the present invention generates.
Fig. 7 is the effect picture of 60% closeness floating ice field of another kind or trash ice field that the present invention generates.
Fig. 8 is the effect picture of 70% closeness floating ice field of one kind or trash ice field that the present invention generates.
Fig. 9 is the effect picture of 70% closeness floating ice field of another kind or trash ice field that the present invention generates.
Figure 10 is the effect picture of 80% closeness floating ice field of one kind or trash ice field that the present invention generates.
Figure 11 is the effect picture of 80% closeness floating ice field of another kind or trash ice field that the present invention generates.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing:
Embodiment 1
In order to overcome trash ice model over-simplification, ice cube shaped in existing three-dimensional floating/trash ice generation method relatively simple
Disadvantage.The present invention combines external ship trial research, proposes a kind of floating/trash ice field generation method.
Particular content of the invention is as follows:
Step 1, determine plane it is floating/geometric parameter of trash ice field
Step 2, sea ice substance point is uniformly distributed in floating/trash ice field
Step 3, the N number of dimension promise point of random distribution in floating/trash ice field
Step 4, sea ice substance point is divided into N number of region according to the two positional relationship
Step 5, the floating/trash ice field comprising N number of floating/rubble ice to form plane difference closeness is approached according to area
Step 6, include the floating/broken of N number of floating/rubble ice according to the given three-dimensional different closenesses of thickness generating random number
Ice stadium
Step 7, three-dimensional floating/trash ice field generates and terminates.
A kind of three-dimensional based on Voronoi diagram is floating/and trash ice field generation method is dynamic near field using Voronoi split plot design
Floating three-dimensional/trash ice navigation channel is generated in mechanics method., shape controllable with size is random, thickness may be provided in a certain range with
The advantages that machine and accurate floating/trash ice closeness.Firstly the need of the geometric parameter for planar setting floating/trash ice domain, setting
Floating/trash ice domain in, be uniformly distributed sea ice substance point, while generating N number of random dimension promise point according to required ice cube size, will put down
Face is divided into N number of region, and the corresponding unique dimension promise point in each region, each piece of floating/trash ice outer outline area is tieed up by center
What the position attribution of promise point codetermined, the distance of each sea ice substance point to the dimension promise point in region is nearest.It uses later
Area approximatioss controls floating/trash ice closeness.While being laid with plane trash ice, thickness side is set by given thickness range
To the random number of plies realize the generation of three-dimensional floating/trash ice field.The present invention can effectively realize three-dimensional floating/trash ice field and generate,
Improve existing floating/trash ice field generate in trash ice model over-simplification, ice cube shaped it is relatively simple, forecast result and actual conditions are not
The disadvantages of being consistent, the improvement calculated for three-dimensional floating/trash ice impedance value provide effective way.
Embodiment 2:
The present embodiment proposes a kind of floating/trash ice field generation method, and detailed process is:
Step 1, determine plane it is floating/geometric parameter of trash ice field
Step 2, sea ice substance point is uniformly distributed in floating/trash ice field
Step 3, the N number of dimension promise point of random distribution in floating/trash ice field
Step 4, FROTRAN language being based on according to the two positional relationship, sea ice substance point is divided into N number of region
Step 5, the floating/trash ice field comprising N number of floating/rubble ice to form plane difference closeness is approached according to area
Step 6, include the floating/broken of N number of floating/rubble ice according to the given three-dimensional different closenesses of thickness generating random number
Ice stadium
Step 7, three-dimensional floating/trash ice field generates and terminates.
Dimension promise function method is applied in the dynamics of near field, realizes in given ice domain and is randomly divided into limited quantity trash ice
Block both less than arrives the distance of other dimension promise points in plane wherein any one sea ice substance point corresponds to the distance of dimension promise point to it.
Floating/broken field under different closenesses is formed using area approach method, each piece of trash ice outer outline area be all by
What the position attribution of each piece of trash ice regional center dimension promise point determined.Promise is tieed up to center using by each piece of trash ice outer outline area
Function point approaches, and is the equal of that each piece of trash ice area is reduced certain ratio, is formed not centered on each dimension promise point
Plane with floating/trash ice closeness floats/trash ice field.
Calculation Plane is floating/and rubble ice considers thickness direction random number while generate, realize the ice sheet of generation in thickness
The thickness for spending different location on direction is random in a certain range, forms the generation of three-dimensional floating/trash ice field.
The parameter setting of sea ice are as follows: elasticity modulus 1.8GPa, Poisson's ratio 0.25, density 890kg/m3。
The present invention can realize generation method proposed by the present invention, the present embodiment benefit using a variety of HLL compilers
With formula translation compiling floating/trash ice field generation method proposed by the present invention.And it in a program will floating/rubble ice division result
Visualization output is carried out, and using being shown in the poster processing soft TECPLOT, to verify effectiveness of the invention.
Floating/trash ice generation method flow chart proposed by the present invention is as shown in Figure 1.Different-thickness effect such as Fig. 2-3 of the present invention
It is shown.The three-dimensional of difference closeness of the invention is floating/and the generation effect of trash ice field is as shown in Fig. 4-11.
Claims (2)
1. a kind of two dimension floating ice field or trash ice field generation method, which comprises the following steps:
Step 1: the quantity N of the two-dimensional geometry parameter and ice cube of setting plane floating ice field or trash ice field overall region；
Step 2: sea ice substance point is uniformly distributed in plane floating ice field or trash ice field overall region；
Step 3: the N number of dimension promise point of random distribution in plane floating ice field or trash ice field overall region；
Step 4: marking off N number of floating ice or trash ice region, each floating ice or broken in plane floating ice field or trash ice field overall region
It include a dimension promise point in the domain of ice formation, and tieed up in all sea ice substance points to the region for including in each floating ice or trash ice region
The distance of promise point is less than the distance to other regions Nei Weinuo point；
Step 5: according to floating ice or the plane dense degree in trash ice region in plane floating ice field or trash ice field overall region, using area
Approach method generates floe or rubble ice in each floating ice or trash ice region, obtains containing N number of floe or rubble ice
Two-dimentional floating ice field or trash ice field.
2. a kind of three-dimensional floating ice field or trash ice field generation method, which comprises the following steps:
Step 1: the quantity N of the two-dimensional geometry parameter and ice cube of setting plane floating ice field or trash ice field overall region；
Step 2: sea ice substance point is uniformly distributed in plane floating ice field or trash ice field overall region；
Step 3: the N number of dimension promise point of random distribution in plane floating ice field or trash ice field overall region；
Step 4: marking off N number of floating ice or trash ice region, each floating ice or broken in plane floating ice field or trash ice field overall region
It include a dimension promise point in the domain of ice formation, and tieed up in all sea ice substance points to the region for including in each floating ice or trash ice region
The distance of promise point is less than the distance to other regions Nei Weinuo point；
Step 5: according to floating ice or the plane dense degree in trash ice region in plane floating ice field or trash ice field overall region, using area
Approach method generates floe or rubble ice in each floating ice or trash ice region, obtains containing N number of floe or rubble ice
Two-dimentional floating ice field or trash ice field；
Step 6: the thickness range of setting floating ice or trash ice contains N number of floe or rubble ice according to thickness generating random number
Three-dimensional floating ice or trash ice field.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103679803A (en) * | 2013-12-03 | 2014-03-26 | 大连海事大学 | Method for dynamic modeling for sea ice in navigation simulator scene |
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- 2019-06-10 CN CN201910496432.9A patent/CN110135115A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103679803A (en) * | 2013-12-03 | 2014-03-26 | 大连海事大学 | Method for dynamic modeling for sea ice in navigation simulator scene |
Non-Patent Citations (4)
| Title |
|---|
| 刘璐等: "基于扩展多面体的离散单元法及其作用于圆桩的冰载荷计算", 《力学学报》 * |
| 叶礼裕等: "潜艇破冰上浮近场动力学模型", 《中国舰船研究》 * |
| 孙昱浩等: "冰区航行视景中基于Voronoi图算法的海冰动态破碎绘制", 《中国体视学与图像分析》 * |
| 狄少丞等: "破冰船冰区操纵性能离散元分析", 《工程力学》 * |
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Application publication date: 20190816 |