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Fluid transition path acquisition device, method for acquiring fluid transition path, and program

A technology for migrating paths and obtaining devices, which is applied in the direction of configuring CAD, special data processing applications, instruments, etc., can solve the problems of limited search range, increased calculation time and design cost, and cannot rule out the local optimum of structures, so as to achieve optimization The effect of the method

Active Publication Date: 2016-06-22
JAPAN SCI & TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, in the existing optimization methods for structure design, there are problems in that calculation time and design cost increase due to repeated large-scale calculations, and on the other hand, the search range has to be limited due to these constraints , the possibility that the derived optimal structure is a local optimum cannot be ruled out

Method used

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  • Fluid transition path acquisition device, method for acquiring fluid transition path, and program
  • Fluid transition path acquisition device, method for acquiring fluid transition path, and program
  • Fluid transition path acquisition device, method for acquiring fluid transition path, and program

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Embodiment approach 1

[0113] Outline of the embodiment of the present invention

[0114] Below, refer to Figure 1~Figure 28 The outline of the embodiment of the present invention will be described, and thereafter, the configuration and processing of the embodiment will be described in detail.

[0115] First, in the present embodiment, pattern transition information is stored, and the pattern transition information relates to a structurally stable flow pattern in the whole or part of the two-dimensional flow structure of phase geometry (hereinafter, also referred to as "streamline pattern") ), through an intermediate flow pattern that is structurally unstable, whether it can migrate to other structurally stable flow patterns. In addition, the method for obtaining this type of transition information for the network will be described later.

[0116] In addition, in the present embodiment, based on the pattern transition information, migration information related to a migration path from a specified structu...

Embodiment

[0349] Here, an embodiment using simulation results will be described. As a premise, for an object placed in a uniform flow, the experimental results or numerical calculation results of the force on the object during a certain period and the flow around the object are stored. Here, the force received by the object is the force received by the object through a uniform flow, specifically, lift or drag. As an example, it may be the lift-to-drag ratio (the ratio of lift to drag).

[0350] here, Figure 32 It is a diagram schematically showing a case where a thin flat plate with a finite thickness is used as an object in a uniform flow in a two-dimensional outer region and placed at an angle with respect to the uniform flow. The symbol U in the figure represents the uniform flow, cl is the length of the longer side of the flat plate, θ is the angle with respect to the uniform flow, and Lx and Ly represent the rectangular area of ​​the calculation subject composed of the lengths in the...

Embodiment approach

[0492] Furthermore, the embodiments of the present invention have been described so far, but the present invention can be implemented in various embodiments within the scope of the technical solution described in the claims in addition to the above-mentioned embodiments.

[0493] In particular, in the above-mentioned embodiment, although an example in which the present invention is applied to a simulated cross section of a three-dimensional fluid (a cross section of a structure, etc.) has been described, it is not limited to this, and can also be applied to a simulation of a two-dimensional fluid. .

[0494] For example, although the case where the fluid migration path acquisition device 100 performs processing in a stand-alone manner is described as an example, the fluid migration path acquisition device 100 may also perform processing according to a request from a client terminal and return the processing result to The client terminal.

[0495] In addition, among the processes des...

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Abstract

The present invention stores pattern transition information as to whether a structurally stable flow pattern in whole or part of a topologically two-dimensional flow structure can transition to another structurally stable flow pattern via one structurally unstable intermediate state flow pattern, and acquires, on the basis of the pattern transition information, transition information pertaining to a transition route leading from a designated structurally stable flow pattern to another structurally stable flow pattern which can be taken from a topological standpoint.

Description

Technical field [0001] The present invention relates to a fluid migration path acquisition device, a fluid migration path acquisition method, and a program. Background technique [0002] In the past, when designing the layout of multiple structures or optimizing the shape of structures with effective fluid dynamics, the optimal structure was determined through repeated fluid simulations based on large-scale numerical calculations. Configured. [0003] For example, in the past, when designing structures such as bridges in uniform flows such as rivers, large-scale computer simulations were used to analyze what kind of flow would be formed around the bridge piers. [0004] In addition, in recent years, algorithms or programs for mathematically processing the topology of flow patterns by constructing mathematical theoretical models of fluids and the like are being developed. [0005] Current technical literature [0006] Non-Patent Document 1: TomaszKaczynski, Konstantin Mischaikow, Maria...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F2111/10G06F30/23G06F30/20G06F30/00G06F2111/20G06F2113/08G06F30/28
Inventor 坂上贵之横山知郎
Owner JAPAN SCI & TECH CORP
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