基于灵敏度分析的龙门加工中心横梁轻量化设计  

Lightweight design for crossbeam of gantry machining-center based on sensitivity analysis

作　　者：张森[1,2] 杨玉萍[1] 邱自学[1] 季彬彬[1] 王俊杰 

机构地区：[1]南通大学机械工程学院,江苏南通226019 [2]泰山科学技术研究院,山东泰安221000

出　　处：《机械设计》2015年第4期110-115,共6页Journal of Machine Design

基　　金：国家自然科学基金资助项目(51110105008);南通市产学研协同创新计划资助项目(BC2012007)

摘　　要：以某龙门加工中心的横梁为研究对象,在传统经验设计得到的横梁结构基础上,建立了基于ANSYS的横梁有限元模型,运用有限元分析方法,对横梁关键尺寸进行静动态特性灵敏度分析。根据灵敏度分析结果,利用最小二乘法,得出了关键尺寸对横梁静动态特性及质量的相对灵敏度。采用极端尺寸调整方法,分别以静变形量、1阶频率为性能指标,实现横梁单性能指标的轻量化设计;然后在两种方案的基础上,得到较为合理的横梁轻量化设计方案。结果表明:在满足横梁静动态特性要求的情况下,横梁质量减小了152 kg,实现了横梁的轻量化设计。Some crossbeam of gantry machining center was taken as the research object. The finite element model was built based on ANSYS and the crossbeam structure from traditional experience. The key sizes of crossbeam based on ANSYS were analyzed from aspects of static-dynamic characteristics sensitivity. The relative sensitivity of static-dynamic characteristics of crossbeam by least-square-method was obtained according to the results of the sensitivity analysis. Lightweight crossbeam of single index was achieved by extreme-size-adjustment method, static deformation and first-order frequency as performance indexes respectively. Then the possible lightweight design was get by above two ways. The results show that the mass of crossbeam reduces by 152 kg to satisfy lightweight demands and the static-dynamic characteristics can be maintained.

关 键 词：横梁 灵敏度分析 轻量化设计 有限元 最小二乘法 

分 类 号：TH16[机械工程—机械制造及自动化] TG502[金属学及工艺—金属切削加工及机床]