【摘要】：石油作為主要能源和優(yōu)質(zhì)化工原料,在一個國家的民生建設(shè),經(jīng)濟建設(shè)和國防建設(shè)中的地位和作用是非常重要的。油井射孔是石油勘探和開采的一項關(guān)鍵技術(shù),射孔槍與射孔彈是油井射孔的重要工具,藥型罩是射孔彈的心臟,因此對藥型罩研究顯得尤為重要。本文運用ANSYS/LS-DYNA對粉末藥型罩聚能射流特性進行了數(shù)值模擬研究,其主要研究內(nèi)容和及結(jié)果如下：(1)聚能射流形成理論和物態(tài)方程參數(shù)計算。采用了經(jīng)典的聚能射流形成理論,得出了藥型罩被壓垮后形成射流和杵體速度和質(zhì)量的計算方法。對密實材料和多孔材料物態(tài)方程進行理論分析,并推導(dǎo)出了物態(tài)方程參數(shù)的計算方法,隨后對密實銅和孔隙率為11.53%銅的物態(tài)方程參數(shù)進行了計算,為數(shù)值模擬提供材料數(shù)據(jù)。(2)聚能射流溫度場和形成過程。針對聚能射流運動穩(wěn)定性問題,基于自適應(yīng)網(wǎng)格方法,運用ANSYS/LS-DYNA 2D,對多孔藥型罩形成聚能射流溫度場進行描述和分析,并與密實藥型罩進行對比,模擬結(jié)果表明,多孔藥型罩形成聚能射流的溫度比密實藥型罩形成聚能射流的溫度高,延展性能好,具有良好的侵徹性能。針對殼體和孔隙對聚能射流頭部速度的影響問題,采用任意的拉格朗日和歐拉(ALE)方法,運用ANSYS/LS-DYNA3D,對帶有彈殼射孔彈多孔藥型罩聚能射流形成過程和射流參數(shù)分布進行了詳細的描述和分析,對比了殼體和孔隙對聚能射流頭部速度的影響。研究結(jié)果表明,所形成聚能射流頭部速度從大到小依次是：帶殼射孔彈多孔藥型罩、帶殼射孔彈密實藥型罩、不帶殼射孔彈多孔藥型罩和不帶殼射孔彈密實藥型罩,彈殼對聚能射流頭部速度的影響要比孔隙大。(3)聚能射流侵徹靶板。采用基于自適應(yīng)網(wǎng)格方法,運用ANSYS/LS-DYNA2D非線性動力學(xué)有限元分析軟件,對孔隙率為11.53%的銅藥型罩射流形成和打靶過程以及聚能射流頭部速度進行詳細描述和分析；對密實銅藥型罩射流形成及打靶的過程進行了數(shù)值模擬。通過對比分析粉末藥型罩和密實藥型罩侵徹靶板的形貌,結(jié)果表明：孔隙率為11.53%的藥型罩打靶在穿深、孔徑兩方面均表現(xiàn)出了更好的侵徹特性。本文的研究工作提供了多孔材料物態(tài)方程參數(shù)的計算方法,使得對多孔藥型罩的數(shù)值模擬研究得以實現(xiàn),并模擬驗證了多孔藥型罩的優(yōu)良特性,為粉末藥型罩的設(shè)計提供一定的理論基礎(chǔ)與模擬計算數(shù)據(jù)。
[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.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE925.3

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本文編號：2231207