Multi-parameter blast vibration safety evaluation method

Abstract

The invention discloses a multi-parameter blast vibration safety evaluation method. The method comprises the steps as follows: a blast vibration signal is decomposed into a series of simple harmonic loads with a wavelet packet decomposition and reconstruction method, energy of the simple harmonic loads is calculated and subjected to normalization processing, then dynamic response of a structural system is calculated under the action of the simple harmonic loads, meanwhile, the normalized energy is proportionally blended into vibration response of the structure, then criterion of blast vibration safety of the structure can be given according to a vibration response admissible value of the structure, and the safety of the structure is evaluated. The criterion is a safe multi-parameter blast vibration criterion capable of reflecting parameters such as the structural property, blast load amplitude, multiple dominant frequencies, duration, energy proportion and the like, and is more detailed, more reasonable and more scientific than the conventional blast vibration safety permissible criterion.

Description

technical field [0001] The invention relates to a multi-parameter safety evaluation method of blasting vibration. Background technique [0002] The current blasting vibration safety standards are all based on the peak velocity of particle vibration as the basic parameter, combined with the main frequency of the vibration signal to evaluate the safety of blasting vibration, without considering the spectrum composition, vibration energy distribution, duration and structural vibration characteristics of the blasting vibration signal And other parameters, so the reliability of its vibration safety evaluation cannot be guaranteed, and there are certain limitations and deficiencies in engineering applications, resulting in some unnecessary property losses and civil disputes. Using the multi-parameter safety evaluation method of blasting vibration to comprehensively evaluate the impact of blasting vibration on buildings and personnel, and to reduce the disturbance of blasting const...

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Problems solved by technology

[0003] The main purpose of the present invention is to overcome the defect of using a single parameter index in the existing blasting vibration safety evaluation standards, and propose a method that comprehensively considers the blasting vibration amplitude, multiple vibration dominant frequencies and durations, signal energy distribution, structural dynamic characteristics, etc. Reliable and Accurate Method to Evaluate Blasting Vibration Safety of Parameters

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