| 引用本文: | 麻震宇,胡凡,陈广南,等.超空泡航行体双层壳结构动力稳定性分析.[J].国防科技大学学报,2011,33(4):43-47.[点击复制] |
| MA Zhenyu,HU Fan,CHEN Guangnan,et al.Dynamic Stability Analysis of Supercavitating Double Shells[J].Journal of National University of Defense Technology,2011,33(4):43-47[点击复制] |
|
| |
|
|
| 本文已被：浏览 7097次 下载 5947次 |
| 超空泡航行体双层壳结构动力稳定性分析 |
| 麻震宇, 胡凡, 陈广南, 张为华 |
|
(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
|
| 摘要: |
| 针对超空泡航行体轴向受力特点，建立超空泡航行体双层壳结构有限元模型，对结构动力稳定性进行分析。数值计算表明，当壳间实肋板厚度增大或环向
肋骨数量和尺寸增加时，动力失稳区域整体下移，不稳定激发频率下降，失稳区域宽度减小幅度较小；当壳间间距减小或纵向肋骨数量和尺寸增加时，双层壳结构动力不稳定激发频率上升，动力失稳区域宽度较大幅度减小，动力不稳定激发程度显著降低。 |
| 关键词: 超空泡 双层壳体 有限元方法 动力稳定性 |
| DOI： |
| 投稿日期：2011-04-13 |
| 基金项目: |
|
| Dynamic Stability Analysis of Supercavitating Double Shells |
| MA Zhenyu, HU Fan, CHEN Guangnan, ZHANG Weihua |
|
(College of Aerospace and Materials Engineering, National Univ.of Defense Technology, Changsha 410073, China)
|
| Abstract: |
| A finite element model for supercavitating underwater vehicles was developed and the dynamic stability of supercavitating double shells was investigated to obtain the instability maps for varying vehicle's velocity considering the time-dependent properties of the longitudinal loads. The computational results indicate that with the increment of the thickness of the annular plates linking between inner and outer shells or the number and dimension of the circumferential stiffeners, the frequencies corresponding to dynamic instability decline and the extension of the regions of dynamic instability is reduced lightly, while the frequencies corresponding to dynamic instability ascend and the dynamic stability is enhanced remarkably with the space between inner and outer shells decreased or the number and dimension of the longitudinal stiffeners
increased. |
| Keywords: supercavitation double shells finite element method dynamic stability |
|
|
|
|
|
