摘要
高频往复式切割刀是柔性材料数控裁剪机的核心部件。该文对切割刀壳体的振动噪声改进措施进行研究。首先对切割刀进行刚体动力学分析,获取其所受动载荷情况,并通过数值计算验证了切割刀刚体动力学模型的可靠性。其次,基于有限元法获取切割刀壳体模态特性,并通过锤击激振实验验证了有限元模型的准确性。然后基于模态仿真结果进行谐响应分析,将计算得到的频域动载荷施加至切割刀壳体各螺栓固定处,获取结构加速度响应频谱,结合振动响应结果,对壳体进行声固耦合分析,并进行实验对比,验证了分析方法的准确性。最后,计算不同的阻尼措施对壳体噪声辐射的影响,为切割刀的减振降噪提供参考。
The high-frequency reciprocating cutting knife was considered as the core component of the flexible material CNC cutting machine.In this paper,the vibration and noise improvement measures of the cutting knife shell were taken as the research objective.Firstly,the rigid body dynamics analysis of the cutter was carried out to obtain the dynamic load condition,and the reliability of the rigid body dynamic model of the cutting knife was verified through numerical calculation.Secondly,the modal characteristics of the cutter shell were obtained based on the finite element method,and the accuracy of the finite element model was verified by the hammer vibration experiment.Thirdly,the harmonic response analysis was performed based on the modal simulation results,and the calculated frequency domain dynamic load was applied to the bolts of the cutter shell to obtain the structure acceleration response spectrum.Through combining the results of the vibration response analysis and carrying out an acoustic-structure coupling analysis on the shell,and the experiment was compared to verify the accuracy of the analysis method.Finally,the impact of different damping measures on the noise radiation of the shell was calculated,which provided a reference for the vibration and noise reduction of the cutting knife.
作者
田野
郭华忠
朱军祖
张文勇
李西兵
TIAN Ye;GUO Huazhong;ZHU Junzu;ZHANG Wenyong;LI Xibing(Fujian Agriculture and Forestry University,Fuzhou 350002,China;Guangdong Ruizhou Technology Co.,Ltd.,Foshan 528251,China;Jinchuan Group Co.,Ltd.,Jinchang 737100,China)
出处
《应用声学》
CSCD
北大核心
2021年第2期227-236,共10页
Journal of Applied Acoustics
基金
福建省自然科学基金计划项目(2017J01681)
佛山市南海区“南海人才计划”创新创业团队项目(201504300004)
福建农林大学优秀研究生学位论文资助基金项目(1122YS01002)。
关键词
切割刀壳体
有限元
模态
声固耦合
振动噪声
Cutting knife shell
Finite element
Modal
Acoustic-structure coupling
Vibration and noise
