摘要
摩擦阻力是物体在流体中运动时受到总阻力的重要组成部分。由于理论分析的复杂性和实际流场的多样性,摩擦阻力的直接测量技术在理论验证和工业设计等领域起到关键作用。介绍一种面向应变式摩阻传感器弹性体的设计,通过分析平行梁结构摩阻传感器的工作原理,确定传感器孔径、平行梁间距、连接梁厚度是影响性能的主要参数;基于正交实验设计法选取三类参数的代表性组合,采用有限元仿真对贴片区的应变分布情况进行数值计算;通过定义应变区系数和应变-变形比等参数以协调互相矛盾的优化目标,分析各因素对传感器性能的影响,最终确认最优参数组合。
Skin friction is a major part of the total resistance an object encounters when moving in a fluid.Due to the difficulty in theoretical analysis and the diversity of flow fields,direct measurement of skin friction is needed in various applications.This paper introduces a design of elastic body for strain-type skin friction sensors.A mechanical analysis of the sensor was carried out.The analysis showed that the radius of the sensor’s hole,the spacing between the parallel beams,and the thickness of the connecting beam are the main parameters affect ing the performance.Then representative combinations of the parameters were selected using the orthogonal experimental method.The strain distribution in the patch area was calculated by using FEM.New parameters were defined to coordinate conflicting optimization goals.The influence of each parameter was analyzed to determine an optimal combination.
作者
陈稼宁
尹瑞多
马丙辉
肖尧
穆聪聪
谢晓斌
CHEN Jianing;YIN Ruiduo;MA Binghui;XIAO Yao;MU Congcong;XIE Xiaobin(Zhejiang Province Inastitute of Metrology,Hangzhou 310016,China;Zhejiang University,Hangzhou 310027,China)
出处
《计量科学与技术》
2021年第11期45-49,55,共6页
Metrology Science and Technology
关键词
摩阻传感器
平行梁结构
力学分析
有限元方法
正交实验设计法
skin-friction sensor
parallel-beam structure
mechanical analysis
FEM
orthogonal experiment method