APPARATUS, METHOD AND PROGRAM FOR ESTIMATING BUCKLING STRESS INTENSITY

• Main Authors: HIROSHIMA SATORU, MITSUI KAZUYA, HANYA KOJI, KUWATA RYOHEI, KITAOKA SATOSHI
• Format: Patent
• Language: English; Japanese
• Published: 21.01.2021
• Subjects: BUILDING; CALCULATING; CEILINGS; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; FIXED CONSTRUCTIONS; FLOORS; GENERAL BUILDING CONSTRUCTIONS; INSULATION OR OTHER PROTECTION OF BUILDINGS; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; PHYSICS; ROOFS; TESTING; WALLS, e.g. PARTITIONS

To provide an apparatus for estimating buckling stress intensity which allows for simpler calculation necessary for estimating buckling stress intensity compared with a case using Fourier series, and can formulate estimated results so as to be physically understood.SOLUTION: A buckling stress intensity estimation apparatus 50 for estimating buckling stress intensity of a plate element which buckles with compression force applied in a direction along an x-axis and spreads along the x-axis extending in a material axis direction and a y-axis extending in a plate width direction includes: a displacement estimation unit 52 which estimates out-of-plane displacement of the plate element facing a direction along a z-axis when a half wavelength in the direction along the x-axis of the plate element which alternately displaces in a wavelike fashion in the direction along the z-axis as it goes toward a first end of the plate element in the direction along the x-axis is defined as (a); and a stress intensity calculation unit 53 which determines buckling stress intensity of the plate element which generates out-of-plane displacement based on energy approach.SELECTED DRAWING: Figure 2 【課題】フーリエ級数を用いた場合よりも座屈応力度の推定に必要な計算を簡単に行うとともに、推定結果を物理的に理解しやすく定式化できる座屈応力度の推定装置を提供する。【解決手段】材軸方向に延びるｘ軸及び板幅方向に延びるｙ軸に沿ってそれぞれ広がり、ｘ軸に沿う方向に圧縮力が作用して座屈する板要素の座屈応力度を推定する座屈応力度の推定装置５０であって、板要素のｘ軸に沿う方向の第１端に向かうに従い、ｚ軸の各向きに交互に波状に変位する板要素の、ｘ軸に沿う方向における半波長をａとしたときに、ｚ軸に沿う方向に向けた板要素の面外変位を推定する変位推定部５２と、面外変位を生じる板要素の座屈応力度を、エネルギー法に基づいて求める応力度算出部５３と、を備える。【選択図】図２