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本文着重介绍应变仪的理论分析与计算,以及电测实验应力分析的基本技术.文章先介绍了电阻应变仪的基本原理及其主要部件的理论计算;并对于这类仪器的质量关键之一——稳定性的改进提出了一些见解及数字根据.接着叙述了经有关工厂采纳了上述部份意见后而设计试制的新产品“华东61型”静动态电阻应变仪的性能指标及其鉴定情况;并与西方名牌同类产品作了比较,列出了一些足以说明其主要质量指标的数据.最后以国产水压机的大型实测试验为例,具体介绍了电测应力分析的步骤方法,以及有关的实验技术;并对“61型应变仪”的实际使用情况作了一些评价.
This article focuses on the theoretical analysis and calculation of strain gauges, as well as the basic techniques of stress analysis of electrical test.Firstly, the basic principle of resistance strain gauges and the theoretical calculation of the main components are introduced. And one of the key points of the quality of these instruments - --An improvement of the stability Some opinions and numerical basis are put forward.Next, the performance index and identification of the new product “East China 61” static and dynamic resistance strain gauge designed and trial-manufactured after the relevant factories adopted the above opinions are described. And compared with the same kind of famous brand in the west, some data that can explain its main quality index are listed.Finally, taking the large-scale actual test of domestic hydraulic press as an example, the steps and methods of electrical stress analysis and the related experimental techniques ; And made some comments on the actual use of “strain gauge 61”.