压气机钛合金叶片外物损伤规律数值仿真研究

为研究不同因素对压气机叶片外物损伤的影响规律,使用LS-DYNA软件对某型高压压气机叶片外物冲击损伤过程进行数值仿真,开展部分工况下外物损伤试验并进行对比,以验证仿真模型的准确性。结果表明:数值仿真计算得到的损伤尺寸以及形貌与试验数据吻合良好。外物材料类型对冲击损伤影响十分明显,材料密度及硬度越大,损伤宽度与深度越大;高脆性材料造成的损伤尺寸较小。损伤尺寸与冲击能量之间呈现出正相关关系,主要表现在外物尺寸与冲击速度上。冲击角度对损伤尺寸影响较小。

Numerical Simulation Research on Foreign Object Damage Law of Compressor Titanium Alloy Blades

In order to research the influence of different factors on foreign object damage of compressor blades,the LS-DYNA was used to carry out the numerical simulation of the impact damage process on a certain type of high-pressure compressor blades.Foreign object damage tests under some working conditions were implemented and compared to verify the accuracy of the simulation model.The results show that the damage size and morphology calculated by numerical simulation are in good agreement with the experimental data.The type of foreign object material has a significant effect on impact damage.The greater the density and hardness of the material,the larger the damage width and depth.The damage size caused by highly brittle materials is smaller.There is a positive correlation between damage size and impact energy,which is mainly manifested in the foreign object size and the impact speed.The impact angle has less influence on the damage size.