The circumferential strains at the outer surface of the model are measured with strain gages after the tubes are pulled out of the model. 應用電阻應變片測量了換熱管從單管模型中拉出后該模型外表面的周向應變，并根據彈性理論從周向應變計算出殘余接觸壓力的實(shí)驗值。
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. 通過(guò)調節施加在壓敏電橋上的電壓大小來(lái)改變橋的平均溫度和軸向應變，可調節濾波器的中心頻率。
