WO2021059620A1 - 設計システム及び設計方法 - Google Patents
設計システム及び設計方法 Download PDFInfo
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- WO2021059620A1 WO2021059620A1 PCT/JP2020/023511 JP2020023511W WO2021059620A1 WO 2021059620 A1 WO2021059620 A1 WO 2021059620A1 JP 2020023511 W JP2020023511 W JP 2020023511W WO 2021059620 A1 WO2021059620 A1 WO 2021059620A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
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- 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
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2111/00—Details relating to CAD techniques
- G06F2111/10—Numerical modelling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Definitions
- the present invention relates to a design system and a design method for performing stress calculation for designing a structure.
- the present application claims priority based on Japanese Patent Application Nos. 2019-177125 and 2019-177126 filed in Japan on September 27, 2019, the contents of which are incorporated herein by reference.
- stress time history data is calculated by analysis using 3D-FEM
- the amount of output data is enormous, so if the cross section of the structure is calculated at all times, the calculation time will be enormous. Therefore, stress data that is critical in design is extracted, and the design is performed based on the extracted stress data.
- the present invention has been made in view of the above-mentioned problems, and provides a design system and a design method capable of performing rational design while easily extracting necessary data from a huge amount of stress acting on a structure.
- the purpose is to provide.
- the present invention is a design system that supports the design of a structure to be designed by using a three-dimensional finite element method, and is based on design data relating to the structure and load of the structure.
- the stress component acting on the structure with respect to the seismic input is analyzed three-dimensionally, the history showing the relationship of the stress of two or more components acting on the structure is calculated, and the region including the history is convex.
- a design is characterized in that a design stress space is set so as to wrap around the shape, and a calculation unit for calculating a first design stress acting on a cross section of the structure is provided based on the design stress space. It is a system.
- the design stress space surrounding all the analysis results is set. It is possible to rationally extract stress data that is critical in design and significantly reduce the number of data used in design.
- the calculation unit three-dimensionally analyzes the stress component acting on the structure with respect to a static load such as a fixed load based on the design data, and acts on the cross section of the structure.
- the stress for the second design may be calculated, and the stress acting on the cross section of the structure may be calculated based on the stress for the first design and the stress for the second design.
- a stress that is a combination of a first design stress and a second design stress is analyzed by using a three-dimensional finite element method of stress acting on a cross section of a structure due to a fixed load or the like.
- the cross section of the structure can be calculated based on.
- the stress components are analyzed three-dimensionally, the history showing the relationship between the stresses of two or more components acting on the structure is calculated, and the design stress space is set so as to enclose the region including the history in a convex shape.
- the design method is characterized in that the first design stress acting on the cross section of the structure is calculated based on the design stress space.
- the design stress space surrounding all the analysis results is set. It is possible to rationally extract stress data that is critical in design and significantly reduce the number of data used in design.
- the design system 1 is a design support device that analyzes the stress acting on the cross section of a building due to seismic force by using the three-dimensional finite element method (3D-FEM).
- 3D-FEM three-dimensional finite element method
- the design system 1 displays an input unit 2 into which design data is input, a calculation unit 4 that calculates a design value based on the input data, and a calculation result of the calculation unit 4.
- a display unit 6 and a storage unit 8 for storing data necessary for the calculation of the calculation unit 4 are provided.
- the design system 1 is realized by, for example, a terminal device such as a personal computer, a tablet terminal, or a smartphone.
- the design system 1 may be a server device that outputs a calculation result through a network.
- the input unit 2 is a user interface for data input realized by a keyboard, a touch panel, or the like.
- the input unit 2 may be a separate terminal device connected wirelessly, by wire, or the like by a tablet terminal or a smartphone.
- design data related to the design such as the structure and load of the building to be designed is input.
- the input design data is stored in the storage unit 8.
- the design data includes various data such as the dimensions of the design object, the floor plan, the weight of the member, the material, the waveform of the seismic wave, and the fixed load such as the wind load.
- the storage unit 8 is a storage device composed of a storage medium such as a flash memory or an HDD (Hard Disk Drive). In addition to the design data input by the input unit 2, the storage unit 8 stores data such as a program that executes a mathematical formula necessary for 3D-FEM analysis.
- the storage unit 8 is built in the design system 1.
- the storage unit 8 may be a storage device that can be attached to and detached from the design system 1, or may be built in a server device connected via a network.
- the calculation unit 4 executes calculations such as 3D-FEM necessary for building design based on the data stored in the memory and the storage unit 8.
- the arithmetic unit 4 is realized by executing a program (software) by a processor such as a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit). Part or all of these functional parts may be realized by hardware such as LSI (Large Scale Integration), ASIC (Application Specific Integrated Circuit), FPGA (Field-Programmable Gate Array), or software. It may be realized by the cooperation of hardware.
- the program may be stored in advance in a storage device such as an HDD (Hard Disk Drive) or a flash memory, or is stored in a removable storage medium such as a DVD or CD-ROM, and the storage medium is stored in the drive device. It may be installed in the storage device by being attached.
- the program may be executed from an external server connected through a network.
- the display unit 6 is, for example, a display device such as an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence) display, or an LED (Light Emitting Diode) display.
- the display unit 6 does not necessarily have to be provided in the design system 1, and may be realized by another terminal device such as a personal computer, a tablet terminal, or a smartphone that is wirelessly or wiredly connected to the design system 1.
- the user inputs design data of a structure such as a building, which is a design object, via the input unit 2.
- the design data is stored in the storage unit 8.
- the calculation unit 4 reads the design data from the storage unit 8 and generates a three-dimensional model of the building.
- the calculation unit 4 generates, for example, a three-dimensional model of a structure such as a reactor building based on design data.
- the calculation unit 4 divides the structure into innumerable elements using the Finite Element Method (FEM) model based on the design data, and calculates the stress component acting on each element.
- the calculation unit 4 performs elasto-plastic seismic response analysis.
- the calculation unit 4 calculates, for example, dynamic stress components (first design stress) of n (n is a natural number) acting on the structure by seismic input.
- the calculation unit 4 calculates a stress component (stress for second design) acting on the structure due to a static load other than at the time of an earthquake.
- the static load includes, for example, D: fixed load, L: load load, T: temperature load, S: snow load, W: wind pressure, H: earth pressure, water pressure, and the like.
- the calculation unit 4 calculates the stress for the first design and the stress for the second design by combining them with a three-dimensional FEM response analysis model.
- the calculation unit 4 calculates the cross section of the structure using the calculated combined stress.
- the calculation unit 4 calculates the stress acting on each element for each component based on the time history.
- Each element is divided into a shell element and a beam element according to the structure of the part constituting the structure.
- the shell element is an element used for modeling a thin plate-shaped member composed of a continuum having a shape like a plate or a shell.
- the shell element is composed of a surface having an apparently zero thickness, and has a rigidity corresponding to the plate thickness in calculation.
- a beam element is an element used for modeling a rod-shaped member composed of a continuum of a beam-like shape.
- a beam element is composed of apparently line-only elements and has a calculated rigidity of a specified cross section.
- the calculation unit 4 analyzes the member based on the shell element.
- the calculation unit 4 calculates stress time history data of eight components acting on the shell element.
- the calculation unit 4 analyzes, for example, a member based on a beam element.
- the calculation unit 4 calculates, for example, stress time history data of six components acting on the beam element.
- the cross-sectional design of the shell element is performed to calculate the balance between the film force (axial force) and the bending stress 6 components (Nx, Ny, Nxy, Mx, My, Mxy).
- the seismic response analysis will be described below.
- the calculation unit 4 performs a three-dimensional analysis (earthquake response analysis) of the dynamic stress acting on the structure in response to the seismic input based on the design data.
- the calculation unit 4 outputs all the stress data acting within the predetermined time when the earthquake is input as stress time history data.
- All stress time history data includes calculation results drawn in an n-dimensional space showing the relationship between n stresses such as axial force, shear force, bending moment, etc. acting on walls, floors, etc. for calculating stress components. It becomes a huge amount of data. Therefore, the calculation unit 4 extracts the design stress used for the cross-sectional design from the enormous amount of stress time history data. The calculation unit 4 extracts stress data that is critical in cross-sectional design from a huge amount of stress time history data.
- the calculation unit 4 is designed so as to wrap a region including a trajectory (history, time history) of a calculation result showing a relationship between an axial force and a bending moment in an outwardly convex shape (for example, a polygon).
- a region including a trajectory (history, time history) of a calculation result showing a relationship between an axial force and a bending moment in an outwardly convex shape for example, a polygon.
- the calculation unit 4 sets the design stress space so as to convexly envelop the region including the locus of the calculation result showing the relationship between the axial force and the bending moment, and designs the design stress space. Calculate as a value.
- Envelope in a convex shape means to cover the area including the trajectory of the calculation result drawn in the space with a figure so that there is no dent.
- the calculation unit 4 sets a design stress space that is convexly entwined with respect to the six components of the film force and the bending stress.
- the calculation unit 4 makes all the data into a convex shape from the loci showing all the stress time history data D of the analysis result showing the relationship between the axial force and the bending moment at a predetermined time.
- the enveloped region R is extracted.
- the algorithm that envelops the convex shape is known as the Quickhull method.
- the calculation unit 4 obtains two points P1 and P2 having the maximum and minimum x-coordinates from the stress time history data D, draws a straight line L connecting the two points, and draws a region. Is divided into two. Next, the calculation unit 4 extracts points P3 and P4 in which the lengths of the perpendiculars T1 and T2 with respect to the straight line are maximum in each region (see FIG. 5B). Next, the calculation unit 4 generates triangular regions R1 and R2 in which both ends of the straight line L are connected by a straight line from the extracted points P3 and P4 (see FIG. 5C).
- the calculation unit 4 excludes the points (inner points and points on the edge) included in the triangular areas R1 and R2 from the processing, and perpendiculars to the straight line newly connected to the points outside the triangular areas R1 and R2. Points P5 and P6 having the maximum lengths of T3 and T4 are extracted (see FIG. 5D). When the points P5 and P6 cannot be extracted, the calculation unit 4 determines that all the analysis result data is enveloped in the quadrangular region formed by the triangular regions R1 and R2, and ends the process. Next, the calculation unit 4 generates triangular regions R3 and R4 from the extracted points P5 and P6 (see FIG. 5E).
- the calculation unit 4 repeats the above processing, and ends the processing when there are no outer points. In the case of two components of stress, all the analysis result data are enveloped in the region surrounded by the convex shape. The above process is extended to three or more stress components. The calculation unit 4 extracts data so as to wrap the locus of the calculation result drawn in the n-dimensional space in a convex shape. By the above processing, the data of the stress for the first design in which all the analysis result data are enclosed in the convex shape is extracted. Since the extracted first design stress data is a part of the analysis result, it does not become a conservative design.
- FIG. 6 is a flowchart showing the processing flow of the design method executed in the design system 1.
- the calculation unit 4 constructs a 3D model of the building using 3D-FEM based on the design data input to the input unit 2, and calculates the stress acting on each element of the 3D model by seismic response analysis. , Analyzing the dynamic stress acting on the building (step S10).
- the calculation unit 4 sets a region surrounding all the data in a convex shape from the locus showing all the stress time history data of the analysis result of the stress acting on the building due to the seismic input, and sets the stress for the first design. Extract (step S12).
- the calculation unit 4 analyzes the stress acting by a static load such as a fixed load using 3D-FEM based on the design data, and calculates the second design stress (step S14).
- the calculation unit 4 calculates a stress (combination stress) in which the first design stress and the second design stress are combined by a solution model using 3D-FEM (step S16).
- the calculation unit 4 calculates the cross section of the building using the calculated combined stress (step S18).
- the total time history data calculated with a duration of 20 seconds / increment of 0.005 seconds is about 4000 pieces, whereas the data is 6-dimensionally entangled by the above processing.
- the amount of data can be significantly reduced to about 700, which is about 1/6 of the total time history data.
- the calculation unit 4 may set the design stress space by other processing.
- the calculation unit 4 sets the design stress space so as to enclose the region including the trajectory of the calculation result showing the relationship between the axial force and the bending moment in a hexagonal shape, and uses the design stress space as the design value.
- Envelope in a hexagonal shape means covering the area including the trajectory of the calculation result drawn in the space with a hexagonal figure.
- the calculation unit 4 sets a design stress space that envelops the six components of the film force and the bending stress in a hexagonal shape.
- the relationship between the axial force and the bending moment will be described as an example.
- the calculation unit 4 makes all the data into a hexagonal shape from the loci showing all the stress time history data D of the analysis result showing the relationship between the axial force and the bending moment at a predetermined time.
- the enveloped region R is extracted.
- the calculation unit 4 obtains two points P1 and P2 having the maximum and minimum x-coordinates from the stress time history data D.
- the calculation unit 4 obtains two points P3 and P4 having the maximum and minimum y-coordinates from the stress time history data D.
- the calculation unit 4 obtains points P5 and P6 that are intersections of straight lines L1 and L2 that pass through points P1 and P2 and are parallel to the y-axis and straight lines L3 and L4 that pass through points P3 and P4 and are parallel to the x-axis.
- P5 and P6 are intersections of points P1, P3, P2 and P4, respectively.
- the calculation unit 4 obtains a straight line L5 connecting P5 and P6.
- the calculation unit 4 obtains a point P7 which is the farthest distance from the straight line L5.
- the calculation unit 4 obtains a straight line L6 that passes through the point P7 and is parallel to the straight line L5, and obtains L7 that is symmetric with respect to L6 with respect to the straight line L5.
- the calculation unit 4 obtains a point P8 at the intersection of the straight line L6 and the straight line L1 and a point P9 at the intersection of the straight line L6 and the straight line L4.
- the calculation unit 4 obtains a point P10 at the intersection of the straight line L7 and the straight line L3 and a point P11 at the intersection of the straight line L7 and the straight line L2.
- the calculation unit 4 generates a hexagonal region R that is surrounded by points P5, P8, P9, P6, P10, and P11 and includes all the stress time history data D.
- FIG. 8 is a flowchart showing the processing flow of the design method executed in the design system 1.
- the calculation unit 4 constructs a 3D model of the building using 3D-FEM based on the design data input to the input unit 2, calculates the stress acting on each element of the 3D model by the seismic input, and calculates each of them.
- the dynamic stress acting on the building is analyzed (step S10).
- the calculation unit 4 sets a region that envelops all the data in a hexagonal shape from the locus showing all the stress time history data of the analysis result of the stress acting on the building due to the seismic input, and sets the apex of the region as the first. It is extracted as a design stress (step S12).
- the calculation unit 4 analyzes the stress acting by the static load including the fixed load using 3D-FEM and calculates the second design stress (step S14).
- the calculation unit 4 calculates a stress (combination stress) in which the first design stress and the second design stress are combined by a solution model using 3D-FEM (step S16).
- the calculation unit 4 calculates the cross section of the building using the calculated combined stress (step S18).
- the amount of data can be significantly reduced by extracting all time history data by hexagonal envelope by the above processing.
- the calculation unit 4 exemplifies the calculation of a locus showing the relationship between the axial force and the bending moment with respect to the relationship of stress acting on the structure, but the present invention is not limited to this, and two or more components acting on the structure You may calculate the locus which shows the relation of stress of. Therefore, although the calculation unit 4 exemplifies setting the area of the design stress space in the two-dimensional space, the design stress space may be a space of three or more dimensions. When the design stress space is three-dimensional or more, the calculation unit 4 may set the design stress space so as to enclose a region including a locus showing a stress relationship of two or more components in a convex shape.
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Abstract
Description
本願は、2019年9月27日に、日本に出願された特願2019-177125及び2019-177126号に基づき優先権を主張し、その内容をここに援用する。
演算部4は、他の処理により設計用応力空間を設定してもよい。演算部4は、例えば、軸力と曲げモーメントとの関係を示す計算結果の軌跡が含まれる領域を6角形状に包絡するように設計用応力空間を設定し、設計用応力空間を設計値として算出する。6角形状に包絡するとは、空間に描かれる計算結果の軌跡が含まれる領域を6角形の図形で覆うことである。演算部4は、膜力と曲げの応力6成分について6角形状に包絡する設計用応力空間を設定する。以下、軸力と曲げモーメントとの関係を例に説明する。
2 入力部
4 演算部
6 表示部
8 記憶部
Claims (3)
- 3次元の有限要素法を用いて設計対象の構造物の設計を支援する設計システムであって、
前記構造物の構造及び荷重に関する設計データに基づいて、地震入力に対して前記構造物に作用する応力の成分を3次元解析し、前記構造物に作用する2成分以上の応力の関係を示す履歴を算出し、前記履歴が含まれる領域を凸の形状に包絡するように設計用応力空間を設定し、前記設計用応力空間に基づいて、前記構造物の断面に作用する第1設計用応力を算出する演算部を備えることを特徴とする、
設計システム。 - 前記演算部は、前記設計データに基づいて、固定荷重を含む静的荷重に対して前記構造物に作用する応力の成分を3次元解析し、前記構造物の断面に作用する第2設計用応力を算出し、
前記第1設計用応力と前記第2設計用応力とに基づいて、前記構造物の断面に作用する応力を算出する、
請求項1に記載の設計システム。 - 3次元の有限要素法を用いて設計対象の構造物の設計を支援する設計方法であって、
前記構造物の構造及び荷重に関する設計データに基づいて、地震入力に対して前記構造物に作用する応力の成分を3次元解析し、
前記構造物に作用する2成分以上の応力の関係を示す履歴を算出し、
前記履歴が含まれる領域を凸の形状に包絡するように設計用応力空間を設定し、
前記設計用応力空間に基づいて、前記構造物の断面に作用する第1設計用応力を算出することを特徴とする、
設計方法。
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CA3155127A CA3155127C (en) | 2019-09-27 | 2020-06-16 | Design system and design method |
GB2203972.1A GB2602592B (en) | 2019-09-27 | 2020-06-16 | Design system and design method |
US17/699,267 US20220207214A1 (en) | 2019-09-27 | 2022-03-21 | Design system and design method |
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JP2019177125A JP7355574B2 (ja) | 2019-09-27 | 2019-09-27 | 設計システム及び設計方法 |
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JP2006170919A (ja) * | 2004-12-17 | 2006-06-29 | Takenaka Komuten Co Ltd | 地震応答解析装置、地震応答解析方法及び地震応答解析プログラム |
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JP2002358541A (ja) * | 2001-06-01 | 2002-12-13 | Matsushita Electric Ind Co Ltd | 3次元図形生成装置、及び3次元図形生成方法 |
JP2006170919A (ja) * | 2004-12-17 | 2006-06-29 | Takenaka Komuten Co Ltd | 地震応答解析装置、地震応答解析方法及び地震応答解析プログラム |
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