To address the challenge of measuring the dynamic stress of engineering rock mass structures under blast loading, a rock mass dynamic stress measurement and calibration method based on Photonic Doppler Velocimetry (PDV) was developed. Split Hopkinson Pressure Bar (SHPB) loading tests were conducted under different wave impedance and coupling conditions to investigate the stress wave transmission effect and to verify the accuracy of the proposed measurement method. The experimental results show that the SHPB-based calibration method for the rock mass dynamic stress measurement system is accurate and reliable. Under the conditions of identical wave impedance and coupling fixation with a thin adhesive layer, the feasibility of the PDV-based dynamic stress measurement method for engineering rock masses is preliminarily verified, providing a feasible technical approach for measuring dynamic response parameters such as stress and strain of structures under blast loading.
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Shi et al. (2026) studied this question.
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