EP1815367A1 - Procede pour etablir un modele de calcul d'une structure mecanique - Google Patents

Procede pour etablir un modele de calcul d'une structure mecanique

Info

Publication number
EP1815367A1
EP1815367A1 EP05805671A EP05805671A EP1815367A1 EP 1815367 A1 EP1815367 A1 EP 1815367A1 EP 05805671 A EP05805671 A EP 05805671A EP 05805671 A EP05805671 A EP 05805671A EP 1815367 A1 EP1815367 A1 EP 1815367A1
Authority
EP
European Patent Office
Prior art keywords
mechanical structure
calculation model
scanning
geometry data
assembled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05805671A
Other languages
German (de)
English (en)
Inventor
Jürgen VEITH
Udo Jankowski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TECOSIM Technische Simulation GmbH
Original Assignee
TECOSIM Technische Simulation GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TECOSIM Technische Simulation GmbH filed Critical TECOSIM Technische Simulation GmbH
Priority to EP05805671A priority Critical patent/EP1815367A1/fr
Publication of EP1815367A1 publication Critical patent/EP1815367A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • 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
    • G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]

Definitions

  • the invention relates to a method for generating a calculation model, in particular a finite element calculation model, a mechanical structure, in particular a mechanical structure of a motor vehicle such as a body shell.
  • Benchmarking of existing products or newly developed products with competitor products still based on the specific hardware and thus an ⁇ hand of a real product.
  • a body shell of a competing product is purchased and it will be made on the real product trials to compare their own product with the competing product.
  • no approach is known from the prior art in order to virtually benchmark competitor products. This is partly due to the fact that CAD design data of competing products are not available and therefore no calculation model or simulation model can be generated from such CAD design data.
  • the present invention is based on the problem of creating a novel method for generating a calculation model of a mechanical structure.
  • the method comprises at least the following steps: a) providing the mechanical structure of which a calculation model is to be generated; b) cleaning the mechanical structure; c) applying reference points to the cleaned and assembled mechanical structure; d) scanning the assembled mechanical structure to generate geometric data of the assembled mechanical structure, individual parts of the assembled mechanical structure and the reference points; e) at least partial disassembly of the assembled mechanical structure into individual parts, which are not completely detectable when scanning the assembled mechanical structure; f) scanning the individual parts alone or in conjunction with at least one attachment of the respective item for Er ⁇ generation of corresponding geometry data; g) Converting the geometry data into a calculation model of the mechanical structure.
  • a method is proposed for the first time in order to generate a digital calculation model based on a real product, namely a real mechanical structure, in order to be able to carry out a virtual benchmarking.
  • a virtual calculation model or simulation model can be generated without CAD design data of the competing product being required.
  • geometry data of the same can be obtained.
  • the geometry data are automatically converted into a virtual calculation model or simulation model.
  • the geometry data are converted automatically into the calculation model or simulation model automatically.
  • the geometry data are first automatically converted into area data and thus CAD data, wherein a virtual calculation model or simulation model of the mechanical structure is then automatically generated from the area data or CAD data.
  • a virtual calculation model of this product can be automatically generated from the real products of a competitor, so that virtual benchmarking with competing products can be carried out in the development of a new product even in early development phases. This opens up completely new possibilities for product development.
  • the mechanical structure When scanning by means of photogrammetric methods, the mechanical structure is first digitized as an assembled unit, after which the mechanical structure is at least partially disassembled after scanning or digitizing the assembled unit, so as to be incompletely detectable during the scanning of the assembled unit , as individual parts or in conjunction with at least one Anbau ⁇ part of each item using photogrammetric method to digital taping.
  • the mathematical model of the mechanical structure namely a three-dimensional CAE calculation model, preferably a three-dimensional finite element calculation model, is subsequently generated from the geometry data obtained during scanning of the assembled unit and the scanning of the individual parts and, if appropriate, add-on parts.
  • the method according to the invention is preferably used in the generation of a finite element calculation model of a mechanical structure of a motor vehicle, namely a body shell of the motor vehicle.
  • FIG. 1 shows a block diagram of the method according to the invention for generating a calculation model of a mechanical structure.
  • the procedure is such that in a first step 10 of the method according to the invention, the row of pipes of which a calculation model is to be generated is considered to be a real mecha nische structure is provided.
  • a body shell is also referred to as body in white (short BIW).
  • the provided body shell is cleaned or cleaned down to the bare metal sheet, for example by removing wax substances and sealants from the body shell. Furthermore, the body shell is freed from sealing materials and possibly existing damping mats.
  • the cleaning or cleaning of the Roh ⁇ body is preferably carried out in an acid or Laugebad.
  • Reference points are then applied in the sense of step 12 to the cleaned bodywork, which may have been freed of sealing materials and damping materials, in order to mark the relative position between selected points or areas of the body shell.
  • the reference points can be applied to the body shell at arbitrary positions or positions.
  • step 13 the provided and cleaned and marked with reference points body shell as an assembled unit by scanning using photogrammetric methods digitized.
  • digital geometry data of the assembled body shell as well as digital Geomet ⁇ riertz of individual parts of the assembled body shell are detected.
  • digital geometry data of the reference points as well as digital geometry data of connection points of the assembled bodyshell are acquired.
  • connection points are, for example, welding points and / or weld seams and / or riveting points and / or screw connections and / or bonding of the assembled body shell, which is composed of several individual parts.
  • scanning the assembled Rohkarosse ⁇ rie further digital geometry data of material thicknesses or thicknesses are detected.
  • the assembled body shell is at least partially disassembled in step 14 of the method according to the invention.
  • This screw connections are solved.
  • Welds or welds or riveting or Klebstel ⁇ len are separated.
  • the dismantling of the assembled body shell is carried out such that individual parts of the body shell, which are completely or partially covered in the assembled state and therefore can not or only partially detected when scanning the assembled body shell, after disassembly in the sense of step 14 in a An ⁇ closing step 15 can be scanned.
  • step 15 therefore, individual parts or individual parts in conjunction with at least one attachment which can not be captured or demanched during scanning of the assembled body shell are scanned separately with the aid of photogrammetric methods in order to also provide digital geometry data for these individual parts win.
  • digital geometry data of the individual parts and, if necessary, of the add-on parts as well as digital geometry data of connection points of the individual parts to the add-on parts as well as digital geometry data of material thicknesses are, in turn, digital geometry data of the individual parts and, if necessary, of the add-on parts as well as digital geometry data of connection points of the individual parts to the add-on parts as well as digital geometry data of material thicknesses.
  • step 13 therefore, the above-mentioned digital geometry data of the assembled green body is present, as a result of step 15, there are the above-mentioned digital geometry data of individual parts and, if necessary, attachments of those individual parts which are obtained when scanning the assembled green body in step 13 can not be completely recorded.
  • the geometric data of the individual parts generated in step 15 are uniquely linked automatically to the geometry data of the reference points and connection points generated in step 15 with the geometry data of the assembled body shell generated in step 13. Scanning takes place optically with a photogrammetric method. During scanning, so-called point clouds of the mechanical structure to be scanned or of individual parts of the mechanical structure are generated as digital geometry data.
  • step 16 the geometry data obtained during scanning and linked together in steps 13 and 15 are converted automatically into surface data and thus into three-dimensional CAD data by means of commercially available software. This can be done, for example, with the software "GEOMAGIC” or “ICEM” or “TEBIS” of the manufacturer of the same name.
  • the area data or CAD data obtained in step 16 are then automatically converted in the sense of step 17 into a virtual calculation model or simulation model of the body shell, namely a CAE calculation model, preferably a three-dimensional finite element calculation model.
  • the automated conversion of the CAD data into a finite element calculation model can be carried out, for example, by means of the product "TEC
  • a virtual calculation model of the real body shell provided in step 10 is provided without having to access design data of the body shell. This allows the generation of virtual calculation models from arbitrary products and thus a virtual benchmarking in product development.
  • a virtual calculation model or simulation model of the bodyshell can also be generated directly from the geometry data obtained during the scan and linked to one another.
  • the geometry data are not converted into surface data or into three-dimensional CAD data, but instead are converted directly and automatically into the calculation model or simulation model.
  • the direct, automated conversion of the geometry data obtained during scanning and linked together into a finite element calculation model can be done, for example, by means of the product "TEC
  • the generated virtual calculation model in the sense of step 18 can be integrated into a simulation environment in which input variables for the virtual calculation model can be generated automatically. This is done, for example, using the product developed and sold by the Applicant under the product name "TEC
  • the virtual calculation model of the bodyshell can be linked in step 18 with further data relevant for the simulation. This may be, for example, material data of the individual parts of the body shell.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Geometry (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Evolutionary Computation (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Pure & Applied Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Mathematical Analysis (AREA)
  • Computational Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)

Abstract

La présente invention concerne un procédé pour établir un modèle de calcul, en particulier un modèle de calcul d'éléments finis, d'une structure mécanique, notamment d'une structure mécanique d'une automobile, telle qu'une carrosserie brute. Ce procédé consiste a) à préparer la structure mécanique à partir de laquelle un modèle de calcul doit être établi, b) à nettoyer la structure mécanique, c) à appliquer des points de référence sur la structure mécanique nettoyée et montée, d) à balayer la structure mécanique montée, afin de produire des données géométriques de la structure mécanique montée, de pièces individuelles de la structure mécanique montée et des points de référence, e) à décomposer au moins partiellement la structure mécanique montée en pièces individuelles qui ne peuvent pas être détectées complètement lors du balayage de la structure mécanique montée, f) à balayer les pièces individuelles seules ou reliées à au moins une pièce ajoutée de chaque pièce individuelle, afin de produire des données géométriques correspondantes, puis g) à convertir ces données géométriques en un modèle de calcul de la structure mécanique.
EP05805671A 2004-11-17 2005-11-07 Procede pour etablir un modele de calcul d'une structure mecanique Withdrawn EP1815367A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05805671A EP1815367A1 (fr) 2004-11-17 2005-11-07 Procede pour etablir un modele de calcul d'une structure mecanique

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP04027277 2004-11-17
EP05805671A EP1815367A1 (fr) 2004-11-17 2005-11-07 Procede pour etablir un modele de calcul d'une structure mecanique
PCT/EP2005/011878 WO2006053644A1 (fr) 2004-11-17 2005-11-07 Procede pour etablir un modele de calcul d'une structure mecanique

Publications (1)

Publication Number Publication Date
EP1815367A1 true EP1815367A1 (fr) 2007-08-08

Family

ID=34927424

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05805671A Withdrawn EP1815367A1 (fr) 2004-11-17 2005-11-07 Procede pour etablir un modele de calcul d'une structure mecanique

Country Status (3)

Country Link
US (1) US20090083016A1 (fr)
EP (1) EP1815367A1 (fr)
WO (1) WO2006053644A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008052904B4 (de) * 2008-10-23 2024-05-02 MTU Aero Engines AG Verfahren zum Ermitteln von mechanischen Eigenschaften einer Beschaufelung
CN101629801B (zh) * 2009-08-18 2012-01-04 上海理工大学 数控磨床导轨热误差确定方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10217068A1 (de) * 2002-04-17 2004-05-19 Michael Gandyra Verfahren zum optischen Messen der Form reflektierender und streuender Freiformflächen
EP1471327A2 (fr) * 2003-03-31 2004-10-27 Mitutoyo Corporation Procédé et appareil pour la mesure sans contact de surfaces trois dimensionelles

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950011757B1 (ko) * 1990-12-28 1995-10-10 마쓰다 가부시끼가이샤 차체의 불량도장부위 연마 방법및 그 장치
US5414647A (en) * 1992-11-23 1995-05-09 Ford Motor Company Non-contact method and system for building CAD models by integrating high density data scans
GB9515311D0 (en) * 1995-07-26 1995-09-20 3D Scanners Ltd Stripe scanners and methods of scanning
US5988862A (en) * 1996-04-24 1999-11-23 Cyra Technologies, Inc. Integrated system for quickly and accurately imaging and modeling three dimensional objects
JP3419213B2 (ja) * 1996-08-30 2003-06-23 ミノルタ株式会社 ３次元形状データ処理装置
US5848115A (en) * 1997-05-02 1998-12-08 General Electric Company Computed tomography metrology
JP4410895B2 (ja) * 2000-01-28 2010-02-03 関西ペイント株式会社 自動車車体の被覆方法
EP1633534B1 (fr) * 2003-04-28 2018-09-12 Nikon Metrology NV Bras de machine de mesure de coordonnees a exosquelette

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10217068A1 (de) * 2002-04-17 2004-05-19 Michael Gandyra Verfahren zum optischen Messen der Form reflektierender und streuender Freiformflächen
EP1471327A2 (fr) * 2003-03-31 2004-10-27 Mitutoyo Corporation Procédé et appareil pour la mesure sans contact de surfaces trois dimensionelles

Also Published As

Publication number Publication date
WO2006053644A1 (fr) 2006-05-26
US20090083016A1 (en) 2009-03-26

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