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力学与实践 ›› 2018, Vol. 40 ›› Issue (3): 253-258.doi: 10.6052/1000-0879-17-395

• 应用研究 • 上一篇    下一篇

球形密闭夹芯结构在内爆载荷作用下的响应分析

潘明乐*,†,2,王伟*, 邱信明*,3   

  1. *清华大学航天航空学院,北京100084;
    †中国航发集团商用航空发动机有限责任公司,上海200241  
  • 收稿日期:2017-11-14 修回日期:2018-01-16 出版日期:2018-06-15 发布日期:2018-07-17
  • 作者简介:潘明乐, 硕士生。邱信明,教授。E-mail: qxm@tsinghua.edu.cn

RESPONSE OF SPHERICAL SANDWICH STRUCTURE UNDER INNER BLAST LOADING

PAN Mingle*,†,2,WANG Wei*,QIU Xinming*,3   

  1. *School of Aerospace Engineering, Tsinghua University, Beijing 100084, China;
    † AECC Commercial Aircraft Engine Co LTD, Shanghai 200241, China
  • Received:2017-11-14 Revised:2018-01-16 Online:2018-06-15 Published:2018-07-17
  • Contact: 国家自然科学基金资助项目(11372163,11732007)

摘要:

轻质夹芯结构在能量吸收领域有很广泛的应用。本文采用数值仿真的方法分析了球形密闭夹芯结构在内爆载荷作用下的动态响应。发现与主要靠夹芯层吸能的平板或曲板结构不同,球形密闭夹芯结构的内壁在能量耗散中起关键作用。与相同质量的均质球壳相比,夹芯层可以有效地降低外壁的变形和应力水平。此外,利用理论分析的方法,得出了几何尺寸对球形夹芯结构能量吸收特性的影响。最后指出,在爆炸容器的设计中,如果充分利用球形夹芯结构的内壁进行耗能,可以显著提高结构的抗爆当量。

关键词:

球形夹芯结构|爆炸载荷|能量吸收

Abstract:

The light-weighted sandwich structures are widely used in the field of energy absorption. The dynamic response of the spherical sandwich structure under inner blast loading is analyzed by means of numerical simulation. It is found that the inner wall of the spherical sandwich structure plays a key role in energy dissipation, which is different to that of the flat or curved sandwich plate. Compared with homogeneous spherical shell of the same mass, the core of spherical sandwich structure can effectively reduce the deformation and stress level of the outer wall. In addition, the influence of geometric size on energy absorption of spherical sandwich structure is obtained by theoretical analysis. Finally, it is pointed out that in the design of the explosive vessel, if the energy consumption of the inner wall of the spherical sandwich structure is fully utilized, the anti-explosive equivalent can be remarkably improved.

Key words:

spherical sandwich structure|blast loading|energy dissipation

中图分类号: 

  • O382