CAJ | 학술논문

　　以在用的300 t ×43 m A型门式起重机的柔性支腿为研究对象，建立了柔性支腿的3种裂纹缺陷模型。运用有限元软件，分析了其在不同位置及开口方向裂纹的影响下的应力和应变状况，得出支腿交叉处以及平行于加强环方向的裂纹对支腿的危害最大，为门式起重机现场检测和安全评估提供了新的方法和理论依据。
　　이재용적300 t ×43 m A형문식기중궤적유성지퇴위연구대상，건립료유성지퇴적3충렬문결함모형。운용유한원연건，분석료기재불동위치급개구방향렬문적영향하적응력화응변상황，득출지퇴교차처이급평행우가강배방향적렬문대지퇴적위해최대，위문식기중궤현장검측화안전평고제공료신적방법화이론의거。
With the current flexible leg of 300 t ×43 mA gantry crane as a study object, the models of three cracking defects on the flexible leg are built.By finite element software, the stress and strain conditions affected by cracks in differ-ent positions and different opening directions are analyzed in the paper , which shows that the crack at the leg intersection and parallel to the direction of reinforcing ring is the most harmful to the leg , which provides new method and theoretic ba-sis for site detection and safety evaluation of the gantry crane.