线加热是船体外板曲面变形的主要技术手段,常用氧乙炔火焰作为热源.然而,目前世界上大多数船厂在使用氧乙炔火焰下的“方法”存在能耗大、污染重、自动化程度低等缺点.本文拟在世界范围内首次采用氢氧火焰作为热源来解决上述问题,氢氧是一种重要的清洁、非排放能源.通过建立机理模型和有限元数值计算模型,研究了板的变形机理和规律.通过工艺参数的确定、温度场和变形的验证、氢氧乙炔火焰成本的比较等实验,验证了模型的准确性、可用性和节能效果.结果 表明:有限元模型计算结果与实验结果吻合较好;氢氧火焰的加工效果和效率能较好地满足船体板弯曲成形的要求;在相同的工艺条件下,氢氧火焰的综合消耗成本比氧乙炔火焰的综合消耗成本要低得多.“,”Line heating is the main practical method for manufacturing curved surfaces in the outer hull plates of a ship.Normally,oxyacetylene flames are used as the heat source.However,performing the line heating method with oxyacetylene flames has challenges in most of shipyards,including large energy consumption,heavy pollution and low automation degree.In order to solve the aforementioned problem,it was intended to utilize the oxyhydrogen flame as the non-emission heat source.Many stud-ies on the deformation mechanism and law of plates were performed through establishing mechanism models and finite element numerical simulation.Then experiments were carried out to evaluate the ac-curacy and availability of models and energy-saving effect.Different aspects,including the determina-tion of processing parameters,verification of the temperature field and deformation field,and economi-cal comparisons between oxyhydrogen and acetylene flames,were investigated in this regards.It was found that the results obtained from the finite element analysis had a good agreement with that of the ex-periment.Moreover,it was observed that the processing effect and efficiency of the oxyhydrogen flame met the requirements of curved surface deformation process of the plates.The present study shows that the overall expense of the oxyhydrogen flame is fairly less than that of the oxyacetylene flame.