穿心式测力环弹性体的结构优化设计  

Structure Optimization Design of the Feedthrough Measuring Ring Elastomer

作　　者：桂贵[1] 齐舒 

机构地区：[1]中铁大桥局集团武汉桥梁科学研究院有限公司,湖北武汉430034

出　　处：《土木工程与管理学报》2015年第1期42-47,共6页Journal of Civil Engineering and Management

摘　　要：本文主要针对穿心式测力环的工作原理,通过建立结构模型及理论计算,详细分析了在不同环体高度、不同边界条件下测力环弹性体截面的受力分布特点,揭示出传统结构形式的测力环产生测试误差的原因,确定出了弹性体结构上反映应力状态的最佳截面位置为沿环壁厚方向的中轴线截面。依此针对性地设计了侧壁开孔式环体结构形式,并通过理论分析和加载试验,验证了在有限高度下弹性体结构最佳截面处的应力、应变在不同边界条件下的分布规律比环壁外侧处变化平缓,这表明优化后的结构形式更能适应不同边界条件的影响。最后引入光纤光栅作为测试元件和优化后的环体结构一起构成测力环,并在张拉平台上进行试验,进一步验证了测力环的工程应用性能。结果表明该项研究对于穿心式测力环技术的开发及应用具有一定参考价值。This paper focuses on the operating mechanism of the feedthrough measuring ring,and by structure modeling and theoretical calculations, a detailed analysis is conducted on the stress distribution characteristics of the cross-section of the measuring ring elastomer at different heights and under different boundary conditions. It reveals the causes of the errors in testing measuring ring in traditional structure,and determines the optimal location of reflecting the reaction state on the cross section of the elastomer structure is the sectional axis along the thickness direction. Based on this,the paper designs the side-wall opening ring structure,and through theoretical analyses and load tests,it is verified that the distribution patterns of the stress and the strain,which are reflected on the optimal location on the cross section atlimited heightsand under different boundary conditions,are more smooth than the changes on the outer side of the ring wall. This shows that the optimized structure better adapts to the effects of different boundary conditions. Finally,fiber grating is introduced to test components,and integrated into the optimized ring structure to construct the measuring ring. In addition,it is tested on the tension platform, and further validates its engineering application performance. The study results show that it can provide insights to the development and application of feedthrough measuring ring technology.

关 键 词：穿心式测力环 边界条件 侧壁开孔式弹性体 

分 类 号：TH823[机械工程—仪器科学与技术]