Research On The Evaluation Method Of Blasting Shock Wave Action Capability Of Typical Energetic Materials

Different types of warheads have different energetic materials selected for their charges according to their application purposes.Energetic materials are an important driving source that can increase the damage power of the warhead.The explosive capability is an important indicator for considering the performance of energetic materials.Therefore,it is necessary to evaluate the explosive capability of energetic materials.The evaluation parameters of explosive capability mainly include three aspects: shock wave pressure capability,thermal capability,and drive.Fragmentation ability.This article mainly focuses on the research on the shock wave pressure capability.Aiming at the problem of how to evaluate the explosive shock wave pressure capability of energetic materials,the corresponding pressure test is carried out.Through the TNT static explosion simulation test,the requirements for the layout of the measuring points are clarified.For the measurement data obtained from multiple measurement points and multiple measurement lines,the work of test data processing and analysis was carried out.Through the work of establishing the basic evaluation model of TNT,the pressure action ability of the typical energetic material explosion shock wave was evaluated.Aiming at the problem of how to accurately obtain the measurement data,the research on the test test and the method of measuring point layout was carried out,and the TNT static explosion simulation test was designed.By using AUTODYN software to simulate and analyze the impact of the explosion height,size(length-diameter ratio),initiation point position,and different equivalents of the TNT cylindrical charge on the three-wave point height change,and obtain the three-wave point height and the burst center distance under different influencing factors.The change curve is established and the relationship model between the two is established,which provides some guidance for the test method and the design of the pressure sensor measuring point position.Aiming at the problem of inaccurate measurement data,research on test data processing and analysis methods has been carried out.The MATLAB signal processing software uses a Bessel low-pass filter with a filter frequency of 40 k Hz to filter the collected original signal curve,filter out the high-frequency noise mixed therein,and read the original data.The data at the same radius of different survey lines are eliminated systematically,and the data at the same radius is eliminated under the premise that there is no systematic error,and finally the data that meets the requirements of establishing the basic evaluation model is obtained.Aiming at the problem of how to evaluate the pressure action capability of the explosive shock wave of energetic materials,the method of establishing the TNT basic evaluation model was carried out.The TNT basic evaluation model was established by the two methods of explosion similarity rate and neural network,and the accuracy of the basic evaluation model was investigated,and the two models were analyzed and compared which had higher prediction accuracy.Aiming at the question of how the warhead selects the charge material,the evaluation method of the pressure action capability of the typical energetic material explosion shock wave is carried out.According to the current evaluation methods commonly used in the industry,the TNT equivalent equivalent is used as the evaluation criterion,and the peak pressure of the surface reflection pressure of the charge at different burst center distances is substituted into the TNT basic evaluation model to calculate the equivalent TNT equivalent,and evaluate it in the form of relative equivalent Explosive ability.The article mainly evaluates the pressure effect of explosive shock wave of energetic materials,and provides some basic data for the application of energetic materials.