Polyvinylidene fluoride (PVDF) film pressure sensors have characteristics such as wide frequency response and a broad dynamic pressure testing range

and are commonly used for shock wave measurements on the surface of flexible targets. However

traditional PVDF sensors rely only on a single piezoelectric mode and are susceptible to in-plane tensile interference when the target deforms

making the output signal difficult to interpret. Although overvoltage measurement has been achieved through circumferential solid support and out-of-plane flexural deformation design

combined with the coupling piezoelectric effect of the directions of d

31

and d

32

the signal still has problems such as high-frequency oscillation and peak overshoot. In response to the above problems

relevant research proposes a damping layer structure optimization strategy thr

ough numerical simulation analysis

and then calibrated experiments to evaluate the impact of different damping layer configurations on signal overshoot. The results show that the central opening in the damping layer can significantly enhance the in-plane stress of the sensitive element

and optimize the dynamic response by reducing the inertial effect of the damping layer. The T4-d35 sensor with a composite open hole configuration effectively suppresses the overpressure peak overshoot by coordinating damping and stiffness. The field explosion experiment further verified that this sensor can accurately capture the dynamic characteristics of the shock waves on the surface of the flexible target

providing a reliable technical means for measuring shock waves in complex environments.