【作者】 齐凯文；

【导师】 李晓杰；

【作者基本信息】 大连理工大学 ， 工程力学， 2012， 硕士

【摘要】 爆轰是十分复杂的化学、物理和力学过程,爆轰过程的高速、高压、高温给爆轰参数的测量带来困难,尤其水中爆炸时引起的物理现象更是复杂且难以准确定量描述的,所以实验和测量技术在爆轰物理研究中的重要作用是显而易见的。连续测量方法有着其独特的优越性,在爆轰波与水下冲击波速度的连续测量中有着非常好的应用前景。本文以现有的爆轰波连续测量方法为基础,研究了测量爆轰波与水下冲击波速度的连续压导探针,这种连续压导探针实现了在一次实验中就可以连续测量爆轰波与水下冲击波的传播过程,而且克服了其它连续测量探针的一些缺点。主要研究内容如下：1、根据现有的爆速连续测量方法,基于HanditrapⅡ连续爆速记录仪,研制一种连续压导探针可以在一次实验中实现同时测量爆轰波与水下冲击波的传播速度,并且阐述了这种探针的工作原理。该方法不仅可以测量任意位置处爆速和水下冲击波速度,还可以扩展成炸药爆压测量的方法。2、炸药水中爆炸时,根据两种介质波阻抗的特点,会在炸药中反射冲击波或者稀疏波,而在水中必然形成冲击波。在C-J模型下,根据爆轰波与介质相互作用关系,推导出计算炸药爆压和介质中初始参数的冲击波反射公式与等熵加卸载公式,并与水箱法与JWL状态方程对比。3、选用黑索金与工业铵油炸药进行水下实验,对连续压导探针的可行性进行了初步探索；利用工程方法估算炸药的爆速,分析实验结果,对实测的炸药爆轰速度与计算值和文献记载数据进行对比分析,对连续压导探针的可信性进行了验证。4、随着计算机技术的发展,数值计算成为了探讨和解决现实中各种复杂问题的重要途径,本文选用AUTODYN对黑索金和工业铵油炸药水下爆炸实验进行数值模拟,并与实验数据对比分析。对水下冲击波的衰减与传播规律进行了初步探索。更多还原

【Abstract】 Detonation is a very complex chemical, physical and mechanical process with high speed, high pressure and high temperature, which made the measurement of detonation parameters difficult. In particular, the physical phenomenon caused by underwater explosion is more complex and difficult to accurately quantitative describe, therefore, experimental and measuring technique play an important role in the research of detonation physics. Continuous measurement method has a good application prospect because of its unique advantage on measurement of the velocity of detonation and underwater shock wave.Based on the existing detonation wave continuous measurement method, continuous pressure conduction probe for measuring velocity of detonation and underwater shock wave was researched, which realized continuous measurement of propagation process of detonation and underwater shock wave during one experiment and overcame the shortcomings of the former continuous probe. The main research contents are as follows:1. According to the existing velocity of detonation continuous measurement method, continuous pressure conduction probe was developed to measure velocity of detonation and underwater shock wave on the basis of HanditrapⅡ VOD recorder during one experiment, and the working principle of this probe was described. The meathod not only applys to measure velocity of detonation and underwater shock wave but also can expand to measure detonation pressure.2. When explosive exploded underwater, according to the wave impedance characteristics of the two media, shock wave or rarefaction wave would be reflected into the explosive, it was bound to form a shock wave in the water. We derived the explosive shock wave reflection formula and equal entropy load and unload formulation, which was used to calculating detonation pressure and initial parameters of media, and compared with tank method and JWL state equation.3. To conduct a preliminary exploration on the feasibility of continuous pressure conduction probe, RDX and ANFO were adopt to carry out underwater experiment, then we estimated the explosives velocity of detonation by engineering methods, the experimental results of velocity of detonation were compared with theoretical calculation value and literature data in order to verify the viable of the continuous pressure conduction probe. 4. With the development of computer technology, numerical calculation has become an important way to explore and solve the complex problems, in this paper, we simulated underwater detonation process of RDX and ANFO by AUTODYN to compared with the experiment. A preliminary exploration was conducted on attenuation and propagation discipline of underwater shock wave.更多还原