【摘要】 建立了适用于高强度海洋平台桩腿齿条厚板氧乙炔切割的预热热源与燃烧热源叠加的新型复合热源模型。确定了热源模型中各类参数,应用Jmatpro计算NV E690的热物理性能参数,并根据金属学的知识,对计算结果进行修正。利用大型弹塑性有限元分析软件ANSYS数值模拟桩腿齿条厚板的切割过程,并与实际加工实测数据对比,验证了材料的热物理性能及热源模型的可靠性。更多还原

【Abstract】 A new type of composite thermal source model is established which integrates pre-heating thermal source with burning thermal source and is applicable to the cutting of thick plate for Jack-up platform leg racks of ocean platforms.Various parameters of the thermal source model are determined.By the use of software Jmatpro the physical parameters for material NV E690 is calculated and appropriated modification of the calculation results is conducted according to related metallographic knowledge.Large finite element analysis software is applied to simulate the cutting process of thick plate for Jack-up platform leg racks.Results from the analysis are compared with measured results in actual machining process to verify the reliability of the thermal physical performance estimation and the suggested thermal source model.更多还原