Safety Evaluation and Application of Blasting Vibration Based on an Improved Hilbert–Huang Transform

Science-based and accurate means for the evaluation of vibration caused by blasting are important for controlling hazards associated with blasting. This paper proposes a system for evaluating safety as it relates to blasting vibration. The system applies the Hilbert–Huang transform (HHT) energy analysis method combined with the signal energy ratio and the natural vibration characteristics of the structure to analyze the instantaneous energy. The application of the HHT is optimized by CEEMDAN, and the criterion of equivalent peak particle velocity ( EPV ) is used. Combined with relevant knowledge of structural dynamics, the calculation for the energy evaluation is thoroughly optimized. The evaluation method combines the characteristics of signal processing, energy analysis and structural dynamics. The influence of vibration velocity, frequency and duration on the response to the vibration is comprehensively considered, and the reason for the instability of structures is explained in terms of input energy. The rationality and feasibility of the evaluation system are verified by specific engineering example. The results show that the intensity of the response of a building to blasting vibration is related to its inherent characteristics and the velocity and frequency of the vibration. The response to a vibration with a large peak particle velocity is not necessarily large, but the response in area far from the blasting site may be amplified to a certain extent, which coincides with the regulations for hazard control that consider the influence of frequency in various locations. However, compared with the traditional control specification, the safety evaluation method introduced in this paper can quantitatively take into account the influence of frequency as well as the duration and inherent characteristics of the blasting signal, thus showing strong applicability.