In order to explore the consistency and data accuracy of each calibration method in the dynamic pressure calibration of the pressure tube cavity

a simple straight-tube type of pressure tube cavity was established to carry out the dynamic characteristic calibration research. The theoretical and simulation methods were used to analyze and establish the model of the pressure tube cavity. The consistency between the theoretical model and the simulation results was very high. Three kinds of sinusoidal pressure calibration devices were used to carry out dynamic calibration for the same pressure tube cavity. Results showed that the dynamic characteristics obtained by the three calibration methods were consistent with the trend of theoretical analysis. For the calibration of the fundamental frequency of the pressure tube cavity

the deviation between the tests was less than 0.55%. However

the maximum deviation from the theoretical value of the fundamental frequency was -3.17%

and there was a large deviation from the other resonance frequencies. This study provides a reference for structural design of pressure tube cavity and compensation correction of dynamic characteristics in the future.