摘要
由于受大型被测件的结构尺寸影响,现代测量仪器自身的结构尺寸也变得越来越大。在综合考虑现有型材结构和后续加工工艺的基础上,提出了一种龙门式测量仪器的大跨度梁结构,设计了4种不同截面形状大跨度梁的解决方案,建立了大跨度横梁的力学模型和三维模型。依据实际工况下的加载方式,仿真分析了不同截面梁的静力学特征,对比不同截面大跨度梁的物理特性和机械特性发现:在满足挠度≤2 mm的前提下,采用矩形下肋板截面的大跨度梁的设计结果最优,用材较少,质量较轻,加工工艺性好。
With the influence of the test piece structure,modern measuring instruments have higher requirements on the test equipment structure.Considering the limitations of existing profile structure and subsequent processing technology,a gantry-type test major structure is designed.The solution of four different crosssectional shapes with long-span beams is presented and the mechanical model and 3 D model of the long-span beams are established.According to the loading method under actual working conditions,the static characteristics of beams with different cross-sections were simulated and compared with the physical and mechanical properties of different cross-sections long-span beams,the results show that the rectangular under the rib crosssection of the long-span beam is the best,and the deflection is less than 2 mm.In this structure,the material is less,the mass is small and the processing technology is good.
作者
侯红玲
孙允璞
王飞
赵永强
HOU Hong-ling;SUN Yun-pu;WANG Fei;ZHAO Yong-qiang(School of Mechanical Engineering,Shaanxi University of Technolog;Shaanxi Hanjiang Machine Tool Co.Lt)
出处
《陕西理工大学学报(自然科学版)》
2018年第4期1-6,共6页
Journal of Shaanxi University of Technology:Natural Science Edition
基金
陕西省重点研发计划项目(2017ZDXM-GY-138)
陕西省教育厅专项科研计划项目(17JK0147)
陕西理工大学研究生创新基金资助项目(SLGYCX1726)
关键词
大跨度梁
截面构型
强度分析
结构优化设计
long-span beam
cross-section configuration
strengtii analysis
structural optimiza-tion design