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1. WO2020116308 - STRESS ASSESSING METHOD FOR AS-WELDED PART OF RAILWAY VEHICLE BOGIE FRAME

Publication Number WO/2020/116308
Publication Date 11.06.2020
International Application No. PCT/JP2019/046555
International Filing Date 28.11.2019
IPC
B61F 5/52 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
61RAILWAYS
FRAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
5Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
50Other details
52Bogie frames
G01L 1/00 2006.01
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
1Measuring force or stress, in general
B23K 31/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
31Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups B23K1/-B23K28/193
G06F 30/23 2020.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
30Computer-aided design
20Design optimisation, verification or simulation
23using finite element methods or finite difference methods
CPC
B23K 31/00
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
31Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
B61F 5/52
BPERFORMING OPERATIONS; TRANSPORTING
61RAILWAYS
FRAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
5Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
50Other details
52Bogie frames
G01L 1/00
GPHYSICS
01MEASURING; TESTING
LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
1Measuring force or stress, in general
G06F 30/23
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
30Computer-aided design [CAD]
20Design optimisation, verification or simulation
23using finite element methods [FEM] or finite difference methods [FDM]
Applicants
  • 日本製鉄株式会社 NIPPON STEEL CORPORATION [JP]/[JP]
Inventors
  • 牧野 泰三 MAKINO, Taizo
  • 下川 嘉之 SHIMOKAWA, Yoshiyuki
  • 谷峰 輝彦 TANIMINE, Teruhiko
  • 近藤 修 KONDO, Osamu
  • 加藤 孝憲 KATO, Takanori
Agents
  • 特許業務法人太陽国際特許事務所 TAIYO, NAKAJIMA & KATO
Priority Data
2018-22832005.12.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) STRESS ASSESSING METHOD FOR AS-WELDED PART OF RAILWAY VEHICLE BOGIE FRAME
(FR) PROCÉDÉ D'ÉVALUATION DE CONTRAINTE POUR PARTIE BRUT DE SOUDAGE DE CADRE DE BOGIE DE VÉHICULE FERROVIAIRE
(JA) 鉄道車両用台車枠のAs-weld溶接部の応力評価方法
Abstract
(EN)
A stress assessing method according to the present invention includes: a first step for generating a finite element model based on a solid model of a bogie frame which has a treated weld part obtained by treating an as-welded part so that a weld toe portion has a nonangular smooth shape; a second step for calculating a stress generated at the weld toe portion of the treated weld part by executing a finite element method analysis using the finite element model generated in the first step; a third step for calculating the nominal stress of the treated weld part by using the stress calculated in the second step and the stress concentration factor or the fatigue strength reduction factor of the weld toe portion of the treated weld part, and regarding this nominal stress as the nominal stress of the as-welded part; and a fourth step for calculating a stress generated at the weld toe portion of the as-welded part by using the nominal stress of the as-welded part obtained in the third step and the fatigue strength reduction factor of the weld toe portion of the as-welded part measured in advance.
(FR)
La présente invention concerne un procédé d'évaluation de contrainte comprenant : une première étape pour générer un modèle d'élément fini sur la base d'un modèle solide d'un cadre de bogie qui a une partie soudure traitée obtenue par traitement d'une partie brut de soudage de telle sorte qu'une partie raccordement présente une forme lisse non angulaire ; une deuxième étape consistant à calculer une contrainte générée au niveau de la partie raccordement de la partie soudure traitée en exécutant une analyse de procédé d'élément fini à l'aide du modèle d'élément fini généré dans la première étape ; une troisième étape consistant à calculer la contrainte nominale de la partie soudure traitée en utilisant la contrainte calculée lors de la deuxième étape et le facteur de concentration de contrainte ou le facteur de réduction de résistance à la fatigue de la partie raccordement de la partie soudure traitée, et concernant cette contrainte nominale en tant que contrainte nominale de la partie brut de soudage ; et une quatrième étape consistant à calculer une contrainte générée au niveau de la partie raccordement de la partie brut de soudage en utilisant la contrainte nominale de la partie brut de soudage obtenue lors de la troisième étape et le facteur de réduction de résistance à la fatigue de la partie raccordement de la partie brut de soudage mesuré à l'avance.
(JA)
本発明に係る応力評価方法は、溶接止端部が角のない滑らかな形状となるようにAs-weld溶接部に手入れが施された手入れ後溶接部を有する台車枠のソリッドモデルによる有限要素モデルを作成する第1工程と、第1工程で作成した有限要素モデルを用いて、有限要素法解析を実行することで、手入れ後溶接部の溶接止端部に発生する応力を算出する第2工程と、第2工程で算出した応力と、手入れ後溶接部の溶接止端部の切欠き係数又は応力集中係数とを用いて、手入れ後溶接部の公称応力を算出し、これをAs-weld溶接部の公称応力とみなす第3工程と、第3工程で得られたAs-weld溶接部の公称応力と、予め測定したAs-weld溶接部の溶接止端部の切欠き係数とを用いて、As-weld溶接部の溶接止端部に発生する応力を算出する第4工程とを含む。
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