Energy absorption principle-based blast vibration comfort evaluation method

Abstract

The invention discloses an energy absorption principle-based blast vibration comfort evaluation method. The method comprises the following steps of approximating a human body by a linear concentration parameter system; forming a vibrator system by the head and the upper trunk through elastic and damping elements, forming a vibrator system by the upper trunk and the spine through elastic and damping elements, forming a vibrator system by the upper trunk and the chest through elastic and damping elements, forming a vibrator system by the spine and the hip through elastic and damping elements, forming a vibrator system by the hip and the legs through elastic and damping elements, and forming a vibrator system by the legs and the feet through elastic and damping elements; and evaluating a vibration characteristic of the human body by using energy transfer and conversion, which is called as blast vibration absorption energy, wherein for a blast vibration digital signal obtained by monitoring, the blast vibration absorption energy defined in the specification is a discrete blast vibration speed digital signal. According to the method, a blast vibration comfort research result is more consistent with the actual situation, an evaluation process is simpler and more effective, and a blast vibration comfort feeling can be quantitatively evaluated.

Description

technical field [0001] The invention relates to the field of blasting vibration energy analysis, in particular to a blasting vibration comfort evaluation method based on the principle of energy absorption. Background technique [0002] The blasting operation will have an adverse effect on the vibration comfort of adjacent buildings (structures). It will affect the smooth progress of blasting operations and social harmony and stability. A large number of studies have shown that people are highly sensitive to the ground vibration caused by blasting, and the sensitivity is about 10 times that of buildings (structures). At present, research in this area is very lacking. Most of the domestic and foreign countries use a single threshold index to evaluate the comfort of blasting vibration. This index does not consider the vibration frequency, duration, vibration characteristics of human body and buildings, and the characteristics of the crowd and the environment. , the evaluation...

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Problems solved by technology

As the vibration intensity increases, it may cause residents' annoyance, uneasiness and even complaints, which will lead to more serious social problems. At present, there are few researches in this area at home and abroad, and the research results are relatively limited.

[0044] 2) At present, most of the indicators for evaluating the impact of blasting vibration on the human body use peak vibration velocity, acceleration and displacement, etc., and the single threshold evaluation indicator does not consider the influence of factors such as vibration frequency and duration

Domestic researchers try to use the vibration dose VDV evaluation index, which can take into account the influence of the three elements of blasting vibration at the same time, but the calculation of the VDV index must first obtain a reliable blasting vibration acceleration, and most blasting vibration monitoring is to monitor the vibration speed, which is objectively restricted. use of an indicator

Moreover, the VDV index cannot consider the influence of the vibration characteristics of the human body itself and the building

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