镗刀内置颗粒碰撞耗能分析
2019-10-12
作者：张恒明
单位：陕西国防工业职业技术学院
摘要：分别建立了两颗粒对心碰撞在弹性挤压、弹塑性挤压、弹性恢复三阶段下的力学模型。利用ABAQUS软件对两颗粒对心碰撞进行仿真，得出了耗能的主要形式，明确了阻尼颗粒材质的优选条件。通过切削试验验证了仿真的正确性，结果表明：在试验条件一致的情况下，填充铝青铜粉的镗刀具有更好的减振效果，镗刀在一阶固有频率下的功率谱密度值为2.464，相比填充铁粉降低了30.88%，颗粒的塑性越大，碰撞耗能越强。
关键词：力学模型；ABAQUS仿真；功率谱密度
中图分类号：TG713;TH161文献标志码：ADOI：10.3969/j.issn.1000-7008.2019.10.020
Collision Energy Consumption Analysis of Particle Filled with Boring Tool
Zhang Hengming
Abstract:The mechanical model of the twoparticle collision along the center line on the elastic extrusion，elastoplastic extrusion and elastic recovery is established respectively.By using ABAQUS to simulate the collision of two particles along the center line，the main form of energy dissipation is obtained，and the optimal conditions of the material of the damping particles are clarified.The correctness of the simulation is verified by cutting experiments.The results show that under the condition of the same experimental conditions，the boring tool filled with aluminum bronze powder has better damping effect，the power spectral density value of the boring tool at the firstorder natural frequency is 2.464，which is reduced by 30.88% compared with the filling of iron powder.The greater the plasticity of the particles，the stronger the collision energy consumption.
Keywords:mechanical model；ABAQUS simulation；power spectral density