AUTOMOTIVE BODY JOINING POSITION OPTIMIZATION ANALYSIS METHOD, DEVICE, AND PROGRAM

• Main Author: TOKITA YUICHI
• Format: Patent
• Language: English; Japanese
• Published: 01.12.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

To provide an automotive body joining position optimization analysis method, device and program for determining an optimal layout of a joining line so as to minimize the length of the joining line, while improving fatigue life and stiffness under a variable load condition.SOLUTION: An automotive body joining position optimization analysis method includes: setting the whole or a portion of an automotive body model, as an analysis target model (S1); setting a joining candidate line for the analysis target model and generating an optimization analysis model 151 (S3); setting a variable load condition (S5); setting the reciprocal of a prescribed target fatigue life, as a target cumulative degree of damage (S7); setting improvement of the stiffness of the optimization analysis model 151, decrease in the cumulative degree of damage, which is the reciprocal of the fatigue life, of the joining candidate line 155, and minimization of the length of the joining candidate line 155, as optimization analysis conditions (S9); and applying the variable load condition to the optimization analysis model 151 and performing an optimization analysis to determine an optimal layout of a joining line 157 to achieve the optimization analysis conditions (S11).SELECTED DRAWING: Figure 11 【課題】変動荷重条件下での疲労寿命と剛性を向上させつつ、接合線の長さを最小化する接合線の最適配置を求める車体の接合位置の最適化解析方法、装置及びプログラムを提供する。【解決手段】本発明に係る車体の接合位置の最適化解析方法は、車体モデルの全部又は一部を解析対象モデルとして設定し（Ｓ１）、解析対象モデルに接合候補線を設定して最適化解析モデル１５１を生成し（Ｓ３）、変動荷重条件を設定し（Ｓ５）、所定の目標疲労寿命の逆数を目標累積損傷度として設定し（Ｓ７）、最適化解析モデル１５１の剛性の向上と、接合候補線１５５の疲労寿命の逆数である累積損傷度の低減と、接合候補線１５５の長さの最小化と、を最適化解析条件として設定し（Ｓ９）、変動荷重条件を最適化解析モデル１５１に与えて最適化解析を行い、最適化解析条件を達成する接合線１５７の最適配置を求める（Ｓ１１）ものである。【選択図】 図１１