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COUPLING OF A LUMPED MASS INTERIOR BALLISTIC CODE WITH THE STRUCTURAL FINITE ELEMENT CODE ABAQUS

机译:集总内弹道代码与结构有限元代码ABAQUS的耦合

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During the ammunition design phase the evaluation of structuralsurvivability during gun launch is a critical parameter. Finite Element Analysis(FEA) is a useful tool for evaluation as it allows designers to visualize phenomenathat would otherwise be impossible to capture through live fire testing methods.Current methods in FEA launch analysis usually involves using a Pressure-Time(PT) curve obtained from live fire testing as a boundary condition to drive theammunition down the gun barrel. While this is a good approximation for thestructural response, these “dummy” PT curves cannot react to or accurately modelreal life phenomena such as over or under size bullets, propellant changes, or boreobstructions because they are completely uncoupled to the physics in the model.This paper studies the results of coupling ARDECIB, a lumped mass interiorballistic code developed at ARDEC similar to IBHVG3, with the FEA codeABAQUS. In this approach pressure data is generated, within ARDECIB bymodeling burning propellants, and passed into the FEA code at the same timeprojectile travel outputs from FEA are passed back to the interior ballistic code.Pressure time curves generated from the linked code are compared with pureIBHVG3 codes and real life test data. A discussion on this code’s value as apredictive tool with limited test data shall be presented.
机译:在弹药设计阶段,对结构进行评估 枪发射过程中的生存能力是一个关键参数。有限元分析 (FEA)是评估的有用工具,因为它允许设计人员可视化现象 否则,就不可能通过现场火力测试方法来捕捉。 FEA发射分析中的当前方法通常涉及使用压力时间 (PT)曲线是从实火测试中获得的边界条件,用以驱动 弹药落在枪管上。虽然这是对 结构响应,这些“虚拟” PT曲线无法反应或无法准确建模 现实生活中的现象,例如子弹过大或过小,推进剂变化或打孔 障碍物,因为它们与模型中的物理学完全无关。 本文研究了集总质量内部ARDECIB的耦合结果 在ARDEC开发的类似于IBHVG3的弹道代码,带有FEA代码 ABAQUS。在这种方法中,在ARDECIB中通过以下方式生成压力数据: 对燃烧推进剂进行建模,并同时传递到FEA代码中 FEA的弹丸行程输出被传递回内部弹道代码。 将链接代码生成的压力时间曲线与纯 IBHVG3代码和实际测试数据。讨论此代码的价值 应提供测试数据有限的预测工具。

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