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Studies of the TNT equivalence of silver azide charges


The pressureradius profile was compared with that from a unit charge of TNT to determine the TNT equivalence of silver azide as a function of peak pressure and of distance from the centre of a silver azide charge.


A new method of analysis was developed so that the charge mass and the TNT equivalence of an explosion could be derived from such a single radiustime measurement.


The TNT equivalence factor for silver azide was shown to vary from 0.3 to 1.4, depending on the distance from the centre of the explosion.


Procedures are described by which the TNT equivalence factor can be calculated at any specified distance from a silver azide charge of known mass, or from a measurement of the shock radius and time, even when the charge mass is not known.

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Studies of the TNT equivalence of silver azide charges


The pressureradius profile was compared with that from a unit charge of TNT to determine the TNT equivalence of silver azide as a function of peak pressure and of distance from the centre of a silver azide charge.


A new method of analysis was developed so that the charge mass and the TNT equivalence of an explosion could be derived from such a single radiustime measurement.


The TNT equivalence factor for silver azide was shown to vary from 0.3 to 1.4, depending on the distance from the centre of the explosion.


Procedures are described by which the TNT equivalence factor can be calculated at any specified distance from a silver azide charge of known mass, or from a measurement of the shock radius and time, even when the charge mass is not known.

 更多 


 The present paper is aimed to introduce a new parameter derived by the authors in defining and evaluating the overpressure effects,that is,ΔP~~0.742__mi~~0.258__+,and its application in the directly ignited FAE.As is known,the destructive effects of the explosive power on the targeted structures in most cases are highly dynamic(other choices are impulse and quasistatic) in nature.However,the currently available parameters for characterizing and evaluating such effects in the dynamic zone seem to be lacking... The present paper is aimed to introduce a new parameter derived by the authors in defining and evaluating the overpressure effects,that is,ΔP~~0.742__mi~~0.258__+,and its application in the directly ignited FAE.As is known,the destructive effects of the explosive power on the targeted structures in most cases are highly dynamic(other choices are impulse and quasistatic) in nature.However,the currently available parameters for characterizing and evaluating such effects in the dynamic zone seem to be lacking in solid theoretical grounds~.Thus,it comes to the need for the paper to derive the new parameter on the basis of numerical simulation of the dynamic response of the singlefreedomdegreesystem to the explosions for a more appropriate expression of the response.The new parameter,ΔP~~0.742__mi~~0.258__+,has been derived by means of combining the peak overpressure and the impulse.At the same time,a method for calculating the TNT equivalence of singleevent FAE has been provided.Calculations have also been made for some singleevent FAE with the method based on the peak overpressure itself and the method based on the new parameter accordingly,with necessary comparisons being mentioned.The results of our trial use prove that the TNT equivalence based on the overpressure only is less than that based on the new parameter.Therefore,it is recommended to use the new parameter herein introduced for calculating and evaluating the TNT equivalence for its advantageous and satisfactory transducers and techniques in measuring the pick explosion overpressure and the impulse.  利用单自由度体系在爆炸载荷作用下的动力响应的数值解,提出了一个近似关系式,进而得到一个新评价指标ΔP0m7.42i0+.258。同时给出了一次型FAE的TNT比当量的计算方法,分别以超压峰值ΔPm和ΔP0m.742i0+.258为评价指标计算了某一次型FAE的TNT比当量,并进行了比较。结果表明,单纯以超压峰值为评价指标的TNT比当量结果低估了一次型FAE的超压作用。鉴于爆炸超压场测试仪器与技术已能够容易地准确测量超压峰值与比冲量,建议以ΔP0m.742i0.+258为一次型FAE的TNT比当量的评价指标。  
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