数值建模时骨料对混凝土侵彻及毁伤问题的影响

Influenceofaggregateonpenetrationprocessof concretetargetwhennumericalmodeling

摘要: 采用二维拉格朗日弹塑性流体力学有限元程序LTZ-2D分析了含骨料混凝土的数值建模对混凝土侵彻及毁伤问题的影响。对比等效混凝土,在混凝土骨料尺寸相对弹体尺寸较小的情况下,对于薄靶侵彻, 低速撞击时骨料对弹体有阻碍作用,而速度较高时,由于靶板背面毁伤面积增大的原因,弹体的剩余速度增大;对于厚靶侵彻,含骨料混凝土的数值建模对弹体的侵彻过程影响不大。
- 爆炸力学 /
- 骨料建模 /
- LTZ-2D /
- 混凝土 /
- 毁伤 /
- 侵彻
Abstract: Atwo-dimensionalLagrangianelastic-plastichydrodynamicfiniteelementcodenamedLTZ- 2Dwasusedtonumericallyexploretheinfluencesoftheaggregatestructuresonthepenetration processesoftheconcretetargetsimpactedbytheprojectilesaswellasthecorrespondingtargetdamage. Andthedimensionsoftheaggregatestructureswereconsideredtobemuchlessthanthoseofthe projectiles.Comparedwithevenconcretetargets,forathinaggregateconcreteplate,whentheimpactvelocityisrelativelylow, theaggregatestructurewillresisttheprojectile,butwhentheimpact velocityishighenough,theresidualvelocitywillbehigherduetothedamageareaincreaseintheback oftheconcreteplate.However,forthickconcretetargets,theinfluencesoftheaggregatestructures onthepenetratingprocesscanbeignored.
- mechanicsofexplosion /
- aggregatemodeling /
- LTZ-2D /
- concrete /
- fracture /
- penetration