| Penetrating ground penetrating weapons have gradually become an indispensable means of deterrence in modern warfare because of their unique combat characteristics and damage effect,but the quantitative analysis of the underground explosion power of this kind of weapons is not perfect at present.The research on using seismic wave to estimate weapon explosion equivalent is mainly focused on using earthquake magnitude to estimate explosion equivalent.According to the characteristics of penetration warhead penetrating deep before explosion,based on the application of Sadowski formula in blasting engineering,a special method for estimating the explosion equivalent of penetration weapons is explored in this thesis.The specific work is as follows:(1)The relationship between seismic wave energy and magnitude and explosion equivalent was expounded,and the equivalent estimation method based on local magnitude M_L and short period body wave magnitude m_b was studied.In this thesis,the law of vibration velocity attenuation of seismic wave was studied theoretically,the regression formula of source energy under flat site and non-flat site was derived,and the method of using the energy obtained by regression to estimate explosion equivalent was put forward.It solved the problem that the prediction accuracy of Sadowski’s formula was poor when there was an elevation difference between the measuring point and the blast center and the site coefficient K was uncertain.(2)The overall framework of the seismic wave acquisition system was analyzed,and each part of the system was designed respectively,including the selection of geophone and the design of acquisition-storage device.According to the combat characteristics of the penetration weapon,the experimental scheme of explosion equivalent estimation was put forward.(3)Based on the measured data of non-flat field,the equivalent was estimated by two algorithms.In the estimation of magnitude-equivalent method,the equivalent result calculated by local magnitude M_L had a great deviation,while the deviation calculated by short-period body wave magnitude m_b was small,but the correction parameter c in the factor was not universal,which made the method limited.In the estimation of the source-equivalent method,the estimated result of the source-equivalent method of the non-flat site was 38%higher than the estimated equivalent,while the estimation result of the traditional Sadowski formula and the whole underground source regression model was more than 100 times of the estimated equivalent.The estimation results showed that the energy-equivalent method of underground source in non-flat field could be used to estimate the explosion equivalent,and the reliability of the proposed method was guaranteed. |
