| 引用本文: | 陈亮,刘荣忠,郭锐,等.掠飞末敏弹耦合运动动导数计算.[J].国防科技大学学报,2018,40(3):22-29.[点击复制] |
| CHEN Liang,LIU Rongzhong,GUO Rui,et al.Calculation of coupled motion dynamic derivatives of swept flight terminal sensitive projectile[J].Journal of National University of Defense Technology,2018,40(3):22-29[点击复制] |
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| 掠飞末敏弹耦合运动动导数计算 |
| 陈亮, 刘荣忠, 郭锐, 杨永亮, 邢柏阳, 高科, 赵博博 |
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(南京理工大学 机械工程学院, 江苏 南京 210094)
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| 摘要: |
| 以新型掠飞末敏弹为研究对象，提出了基于欧拉转动定理和滑移网格技术的复杂角运动模拟方法，利用著名的罗德里格斯转换矩阵插值求得弹箭在每个时间步的角速度修正值，并指定给球形滑移网格区。通过对非定常气动参数进行求解辨识，分析了不同马赫数下掠飞末敏弹滚转运动对其俯仰组合动导数和升力系数动导数的影响规律。结果表明：所提角运动模拟方法可有效消除姿态角计算的累积误差，实现对弹箭任意给定角运动的准确模拟；弹箭滚转运动对俯仰组合导数和升力系数动导数的辨识结果均存在显著影响，在进行弹箭动导数计算和稳定性分析时需充分考虑俯仰耦合效应的影响。 |
| 关键词: 耦合运动 数值模拟 动导数 掠飞末敏弹 滑移网格 |
| DOI：10.11887/j.cn.201803004 |
| 投稿日期：2017-04-12 |
| 基金项目:国家自然科学基金资助项目(11372136); 江苏省普通高校研究生科研创新计划资助项目(KYLX160483)；中央高校基本科研业务费专项基金资助项目(30916011306) |
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| Calculation of coupled motion dynamic derivatives of swept flight terminal sensitive projectile |
| CHEN Liang, LIU Rongzhong, GUO Rui, YANG Yongliang, XING Boyang, GAO Ke, ZHAO Bobo |
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(School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)
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| Abstract: |
| A novel swept flight terminal sensitive projectile was taken as a computation object, and the method to deal with simulation of the complex angular motion based on the Euler rotation theorem and a spherical sliding meshing technique was proposed. The modification value of the projectile′s angular velocity at each time step was interpolated out through applying the Rodriguez transformation matrix, and it was further allocated to the sliding meshing zone. Based on the method, the influences on pitching combination dynamic derivatives and lift coefficients under various Mach numbers made by the projectile′s rolling motion were analyzed after solving and identifying the unsteady aerodynamic parameters. Results indicate that: the proposed method can eliminate the accumulative errors in the calculation of attitude angles effectively and can realize the accurate simulation under arbitrary given angular motion; the projectile′s rolling motion generate significant influences on the identification results of pitching combination dynamic derivatives and lift coefficients, and the influence of the pitching coupled effect should be taken into account in the process of calculating the projectile′s pitching motion and stability analysis. |
| Keywords: coupled motion numerical simulation dynamic derivatives swept flight terminal sensitive projectile sliding mesh |
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