粉末药型罩聚能射流性能的数值模拟
发布时间：2018-09-08 17:32
【摘要】：石油作为主要能源和优质化工原料,在一个国家的民生建设,经济建设和国防建设中的地位和作用是非常重要的。油井射孔是石油勘探和开采的一项关键技术,射孔枪与射孔弹是油井射孔的重要工具,药型罩是射孔弹的心脏,因此对药型罩研究显得尤为重要。本文运用ANSYS/LS-DYNA对粉末药型罩聚能射流特性进行了数值模拟研究,其主要研究内容和及结果如下：(1)聚能射流形成理论和物态方程参数计算。采用了经典的聚能射流形成理论,得出了药型罩被压垮后形成射流和杵体速度和质量的计算方法。对密实材料和多孔材料物态方程进行理论分析,并推导出了物态方程参数的计算方法,随后对密实铜和孔隙率为11.53%铜的物态方程参数进行了计算,为数值模拟提供材料数据。(2)聚能射流温度场和形成过程。针对聚能射流运动稳定性问题,基于自适应网格方法,运用ANSYS/LS-DYNA 2D,对多孔药型罩形成聚能射流温度场进行描述和分析,并与密实药型罩进行对比,模拟结果表明,多孔药型罩形成聚能射流的温度比密实药型罩形成聚能射流的温度高,延展性能好,具有良好的侵彻性能。针对壳体和孔隙对聚能射流头部速度的影响问题,采用任意的拉格朗日和欧拉(ALE)方法,运用ANSYS/LS-DYNA3D,对带有弹壳射孔弹多孔药型罩聚能射流形成过程和射流参数分布进行了详细的描述和分析,对比了壳体和孔隙对聚能射流头部速度的影响。研究结果表明,所形成聚能射流头部速度从大到小依次是：带壳射孔弹多孔药型罩、带壳射孔弹密实药型罩、不带壳射孔弹多孔药型罩和不带壳射孔弹密实药型罩,弹壳对聚能射流头部速度的影响要比孔隙大。(3)聚能射流侵彻靶板。采用基于自适应网格方法,运用ANSYS/LS-DYNA2D非线性动力学有限元分析软件,对孔隙率为11.53%的铜药型罩射流形成和打靶过程以及聚能射流头部速度进行详细描述和分析；对密实铜药型罩射流形成及打靶的过程进行了数值模拟。通过对比分析粉末药型罩和密实药型罩侵彻靶板的形貌,结果表明：孔隙率为11.53%的药型罩打靶在穿深、孔径两方面均表现出了更好的侵彻特性。本文的研究工作提供了多孔材料物态方程参数的计算方法,使得对多孔药型罩的数值模拟研究得以实现,并模拟验证了多孔药型罩的优良特性,为粉末药型罩的设计提供一定的理论基础与模拟计算数据。
[Abstract]:As the main energy and high quality chemical raw material, petroleum plays a very important role in the national livelihood construction, economic construction and national defense construction. Oil well perforation is a key technology in oil exploration and exploitation. Perforating gun and projectile are important tools for oil well perforation. In this paper, ANSYS/LS-DYNA is used to simulate the characteristics of the shaped jet of powder charge hood. The main contents and results are as follows: (1) the formation theory of shaped jet and the calculation of the parameters of the equation of state. Based on the classical forming theory of shaped jet, the method of calculating the velocity and mass of jet and pestle is obtained. The equation of state of dense material and porous material is analyzed theoretically, and the calculation method of equation of state parameters is deduced, and then the equation of state parameters of dense copper and copper with 11.53% porosity are calculated. Provide material data for numerical simulation. (2) temperature field and formation process of shaped jet. Aiming at the stability of shaped jet motion, the temperature field of shaped jet formed by porous charge hood is described and analyzed by using ANSYS/LS-DYNA 2D method based on adaptive mesh method. The simulation results show that the temperature field of shaped jet is compared with that of dense charge cover. The temperature of the shaped jet formed by the porous charge cover is higher than that of the shaped jet formed by the dense charge cover, and it has good extensibility and penetration performance. Aiming at the influence of shell and pore on the velocity of shaped jet head, an arbitrary Lagrangian and Euler (ALE) method is used. The forming process of shaped jet and the distribution of jet parameters are described and analyzed in detail by ANSYS/LS-DYNA3D,. The effects of shell and pore on the velocity of shaped jet head are compared. The results show that the velocity of shaped jet is in order from large to small as follows: porous charge cover with shell perforator, dense charge cover with shell perforator, porous charge cover without shell perforator and dense charge housing without perforating shell. The effect of shell case on the velocity of the shaped jet head is greater than that of the pore. (3) the shaped jet penetrates the target plate. Based on adaptive mesh method and ANSYS/LS-DYNA2D nonlinear dynamic finite element analysis software, the formation and shooting process of copper powder cover jet with porosity of 11.53% and the velocity of shaped jet head are described and analyzed in detail. Numerical simulation of jet formation and shooting process of dense copper cartridge is carried out. By comparing and analyzing the morphology of the powder and dense powder radome penetrating into the target plate, the results show that the penetration depth and pore size of the powder type cover with the porosity of 11.53% are better than that of the latter. The research work in this paper provides a method for calculating the parameters of the equation of state of porous materials, which enables the numerical simulation of the porous propellant cover to be realized, and the simulation verifies the excellent characteristics of the porous propellant cover. It provides a certain theoretical basis and simulation data for the design of powder mask.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE925.3
本文编号：2231207
[Abstract]:As the main energy and high quality chemical raw material, petroleum plays a very important role in the national livelihood construction, economic construction and national defense construction. Oil well perforation is a key technology in oil exploration and exploitation. Perforating gun and projectile are important tools for oil well perforation. In this paper, ANSYS/LS-DYNA is used to simulate the characteristics of the shaped jet of powder charge hood. The main contents and results are as follows: (1) the formation theory of shaped jet and the calculation of the parameters of the equation of state. Based on the classical forming theory of shaped jet, the method of calculating the velocity and mass of jet and pestle is obtained. The equation of state of dense material and porous material is analyzed theoretically, and the calculation method of equation of state parameters is deduced, and then the equation of state parameters of dense copper and copper with 11.53% porosity are calculated. Provide material data for numerical simulation. (2) temperature field and formation process of shaped jet. Aiming at the stability of shaped jet motion, the temperature field of shaped jet formed by porous charge hood is described and analyzed by using ANSYS/LS-DYNA 2D method based on adaptive mesh method. The simulation results show that the temperature field of shaped jet is compared with that of dense charge cover. The temperature of the shaped jet formed by the porous charge cover is higher than that of the shaped jet formed by the dense charge cover, and it has good extensibility and penetration performance. Aiming at the influence of shell and pore on the velocity of shaped jet head, an arbitrary Lagrangian and Euler (ALE) method is used. The forming process of shaped jet and the distribution of jet parameters are described and analyzed in detail by ANSYS/LS-DYNA3D,. The effects of shell and pore on the velocity of shaped jet head are compared. The results show that the velocity of shaped jet is in order from large to small as follows: porous charge cover with shell perforator, dense charge cover with shell perforator, porous charge cover without shell perforator and dense charge housing without perforating shell. The effect of shell case on the velocity of the shaped jet head is greater than that of the pore. (3) the shaped jet penetrates the target plate. Based on adaptive mesh method and ANSYS/LS-DYNA2D nonlinear dynamic finite element analysis software, the formation and shooting process of copper powder cover jet with porosity of 11.53% and the velocity of shaped jet head are described and analyzed in detail. Numerical simulation of jet formation and shooting process of dense copper cartridge is carried out. By comparing and analyzing the morphology of the powder and dense powder radome penetrating into the target plate, the results show that the penetration depth and pore size of the powder type cover with the porosity of 11.53% are better than that of the latter. The research work in this paper provides a method for calculating the parameters of the equation of state of porous materials, which enables the numerical simulation of the porous propellant cover to be realized, and the simulation verifies the excellent characteristics of the porous propellant cover. It provides a certain theoretical basis and simulation data for the design of powder mask.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE925.3
【参考文献】
相关期刊论文 前2条
1 史慧生;药型罩质量分布对射孔弹穿透性能的影响[J];爆破器材;1997年04期
2 李如江;刘天生;沈兆武;樊自建;;多孔药型罩聚能射流的稳定性[J];爆炸与冲击;2009年02期
，本文编号：2231207
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