叶片受软体和硬体外物撞击的损伤分析

尹冬梅;钱林方

振动与冲击 ›› 2009, Vol. 28 ›› Issue (3) : 6-9.

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振动与冲击 ›› 2009, Vol. 28 ›› Issue (3) : 6-9.
论文

叶片受软体和硬体外物撞击的损伤分析

  • 尹冬梅;钱林方
作者信息 +

Analysis of impact damage on the blades due to soft body and hard body impacts

  • Yin Dong-mei, Qian Lin-fang
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文章历史 +

摘要

针对发动机叶片常遭受外物的撞击损伤,不同材料的外物的撞击损伤存在着差别。从能量守恒和基本水动力学的角度分析了软体和硬体撞击叶片时的不同的撞击载荷模型。通过在LS-DYNA中就软体(以明胶为例)和硬体(以砂石为例)外物对叶片的撞击损伤过程进行了数值仿真分析。结果表明:在相同的初始撞击能量、相同的撞击速度及相同的撞击入射角度下,砂石撞击叶片时的撞击接触力幅值较大,但持续时间较明胶撞击时的要短,在撞击瞬间砂石和叶片获得最大的应变能。撞击过程中,由于明胶发生了流变,其对叶片产生的局部损伤比砂石要小。

Abstract

Foreign object damage(FOD) often occurs while engine blades are working.The damage due to different foreign object impacting is different.The energy balance model and the fundamental hydrodynamics were used to analyse the impact force for soft body and hard body impacting on the blades. Numerical simulations of soft body and hard body impacting on the blades were done in the LS-DYNA. Gelatine and sandstone were respectively used as soft body and hard body in the simulations.The results suggest that the amplitude value of the impact contact force for sandstone impacting is bigger than the one for gelatine impacting with the same initial impacting energy and the same impacting velocity and the same impacting angle.But its duration is shorter than the one for gelatine impacting. Sandstone and blade gain the most strain energy at the moment of impacting.Because of the gelatine’s rheology during the impacting, the local damage for blades due to gelatine impacting is smaller than the one due to sandstone impacting.

关键词

叶片 / 数值分析 / 外物损伤 / 撞击

Key words

blade / numerical analysis / foreign object damage / impact

引用本文

导出引用
尹冬梅;钱林方. 叶片受软体和硬体外物撞击的损伤分析[J]. 振动与冲击, 2009, 28(3): 6-9
Yin Dong-mei;Qian Lin-fang. Analysis of impact damage on the blades due to soft body and hard body impacts[J]. Journal of Vibration and Shock, 2009, 28(3): 6-9

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