overhead crane girder

基本解釋

In recent years some new profile steels are used for main girder of domestic made electric single girder overhead travelling crane.
近年來國內電動單梁起重機主梁采用一些新截面型式。
Cracks occurred in the main weld joining the web and upper wing panel of an overhead crane girder of I-section, some of which have expanded to the structure material and even led to girder fracture.
橋式起重機采用工字形截面作為主梁，使用多年后該結構形式的主梁上翼緣板和腹板連接的主焊縫及母材多處產生裂紋，甚至發(fā)生主梁斷裂事故。
The formula under given fracture length is verified by fatigue test datas of welded box girder on overhead travelling crane.
并用橋式起重機焊接箱形梁的疲勞試驗數(shù)據(jù)，對給定裂紋長度時構件疲勞可靠度的計算公式進行驗算。