Fragment and its destroy effect produced by conventional weapon;

With the development of high and new technology,precision-guided weapon has become main weapon in modern wars,therefore the research on the effect of local damage by conventional weapons and the countermeasure have become important in protective engineering.

This impact can be used in some conventional weapon as the basic contact fuze.

Under the explosion of conventional weapons at a certain distance,underground defense structures subjected to blast impact may not be damaged for their low resistance,but they will endure large vibration accelerations,which may lead to breakage of equipments and casualty inside.

Corresponding to the "Oslo Progress",which aims to prohibit the cluster munitions comprehensively,the High Contracting Parties of the Convention on Prohibitions or Restrictions on the Use of Certain Conventional Weapons(CCW) stared the series of talks to the problem on restricted use of cluster munitions.

To the developing trend and close-up damage property of the conventional bomb,and the article has tried to reduce the destruction of frame column with compound structure with foam aluminum layer and steel panels.