弹性体承受高频动载时,其应变是以波的形式在弹性体中传播。如用电阻应变计来测定机械结构和工程设施的这类高频动态应变,就要考虑在应变波的传播过程中各种因素对测量结果的影响。为了正确选择动态应变测量的应变计栅长,或计算已知栅长的应变计的可测应变波频率,必须研究应变计栅长与可测应变波频率的关系。对于这个问题,捷克Z.Ruzha[1]在1961年把应变波看作正弦波,并以角度表示应变波的波长和应变计的栅长,导出应变计所测应变 When subjected to high-frequency dynamic loading, the strain propagates in the form of waves in the elastomer. Such as the use of resistance strain gauges to determine the mechanical structure and engineering facilities of such high-frequency dynamic strain, it is necessary to consider the propagation of strain in the wave of various factors on the measurement results. In order to correctly select the strain gauge gate length of dynamic strain measurement or to calculate the measurable strain wave frequency of strain gages with known gate length, it is necessary to study the relationship between strain gage length and measurable strain wave frequency. For this problem, the Czech Z.Ruzha [1] regarded the strain wave as a sine wave in 1961 and expressed the angle of the wavelength of the strain wave and the strain gage length, and deduced the strain measured by the strain gage