波浪作用下床面切应力测量初探

Preliminary study of bed shear stress measurement under wave action

在前人研究基础上,进行了波浪水槽实验。采用新型热敏传感器直接测量波浪作用下床面切应力分布情况。通过分析输出电压与理论切应力之间的关系,得出传感器电压值与理论计算切应力均随时间而周期性变化,充分验证了热敏传感器在测量床面切应力时的可行性,为进一步直接测量床面切应力奠定了基础。

Based on the previous results,the wave flume experiment was carried out in this paper.A new heat-sensitive sensor was adopted in this study to directly measure the bed shear stress under wave action. According to the analysis of the relationship between output voltage and theoretical shear stress,voltage value of the sensor and theoretical shear stress are both varied with time periodically.This result fully validates the feasibility of the heat-sensitive sensor used in measurement of bed shear stress,and also lays the foundation for further researches on the direct measurement of bed shear stress.