CAJ | 학술논문

以浙江巨化集团热电厂露天煤场ZQ5t-40m-A8抓斗装卸桥为研究对象，一方面采用超声波测厚仪（型号：CT160）现场测量主梁多个截面的板厚，以此数据来计算主梁的强度和刚度是否满足使用要求；另一方面运用断裂力学，分析焊接箱型主梁在循环往复的交变载荷作用下弹塑性裂纹的扩展和失稳规律，并相对准确的预估出起重机的疲劳寿命。通过主梁刚度、强度和疲劳寿命的分析计算，对于减少起重机腐蚀、疲劳破坏事故的发生，指导起重机设计、制造、维护和特种设备检验分析等方面具有极其重要的意义。
이절강거화집단열전엄로천매장ZQ5t-40m-A8조두장사교위연구대상，일방면채용초성파측후의（형호：CT160）현장측량주량다개절면적판후，이차수거래계산주량적강도화강도시부만족사용요구；령일방면운용단렬역학，분석한접상형주량재순배왕복적교변재하작용하탄소성렬문적확전화실은규률，병상대준학적예고출기중궤적피로수명。통과주량강도、강도화피로수명적분석계산，대우감소기중궤부식、피로파배사고적발생，지도기중궤설계、제조、유호화특충설비검험분석등방면구유겁기중요적의의。
A research on ZQ5t-40 m-A8 grab crane of Zhejiang JuHua group outdoor coal thermal power plant was made. On the one hand, the thickness of multiple cross section of the main girder was measured by using the ultrasonic thickness meter(model:CT160) to determine whether the intensity and stiffnessmeeting the requirements;on the other hand by using fracture mechanics, analyzing the expansion of the elastic-plastic crack and the regularity of instability of the welded box girders under the action of alternating load loop, and the fatigue life of cranewas accurately estimated. It is signiifcant thatthe main girder stiffness, strength and fatigue life are analyzed and calculated for reducing the crane corrosion and fatigue damage accidents, and has an important guide on the crane design, manufacturing, maintenance and special equipment inspection analysis.