ABSTRACT

The plastic deformation of hold section of a warship subjected to noncontact explosion pressure caused by an anti-ship missile or a laser-guided bomb was analyzed in this paper. The explosion load is transformed to static load on the basis of explosion theory and some correspondence literatures. Both nonlinear material and nonlinear geometrical are considered in the finite-element analysis. The correspondence conclusions about the compartment attacked by an anti-ship missile or a laser-guided bomb were obtained.

INTRODUCTION

The naval ships are often suffered the attack of weapons such as torpedo, cannon, bomb and guided missile etc. in the sea warfare. It results in distortion, failure of ship structures and equipments and even capsize. It's an important task to know how much dose the damaged ship have the residual strength to keep survival ability and battle effectiveness. It's also a concerned issue of every country's navies.

There are many factors to result in damage. The damaged serious extent is different(Zhu,1998). From the effect of destroying test of nuclear weapon for warship nuclear weapon is the most fatal weapon for warships. But until now nuclear weapon has not been used. After the second world war guided missile as a new developed weapon has substituted cannon which was used for several centuries as a main weapon. Now it's equipped in naval ships and has been an armament to threaten warship's survivability.

The plastic deformation in a hold section of a warship subjected to non-contact explosion pressure caused by an anti-ship missile or a laser-guided bomb was analyzed in this paper.

Explosion Load

Explosion load is a complex load and difficult to be expressed in mathematical formula. In this paper some related knowledge was used to transform explosion load to static load. We assume that the effect of explosion load is local.

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