The central frequency of the filter is adjusted by changing the voltage applied on the Wheatstone bridge, which can change the average temperature and axial strain of the bridge. 通过调节施加在压敏电桥上的电压大小来改变桥的平均温度和轴向应变，可调节滤波器的中心频率。
The circumferential strains at the outer surface of the model are measured with strain gages after the tubes are pulled out of the model. 应用电阻应变片测量了换热管从单管模型中拉出后该模型外表面的周向应变，并根据弹性理论从周向应变计算出残余接触压力的实验值。
