中文摘要：

以某重型数控龙门铣床大跨度重载横梁为研究对象,基于有限元软件进行建模和力学分析,研究了大跨度动梁结构在实际工况条件下的载荷分布及受力变形情况,通过接触分析和约束分析,提出了考虑溜板重叠效应的大跨度承载曲线的创建及描述方法,得到刀尖点的轨迹变形,为大跨度横梁设计结构的改进和预起拱曲线的加工提供了理论依据和仿真方法.

英文摘要：

Using the long span and heavy load crossbeam of some machine tools plant＇s heavy-type numerical control milling planer as a subject,this paper builds a model and force analysis through the finite element software.The force distribution and deformation condition of the long span motion girder under the actual working condition are also studied.The describing method and establishing process of the long span load curve,which considers the strolling board superposition effect,are built by contacting analysis and restraining analysis.The tool tip＇s trajectory deformation is obtained.The research provides a sufficient theory basis and simulation method for improving the crossbeam structure and obtaining a perfect arch in advance.