Page 59 - 《应用声学》2021年第2期

第 40 卷 第 2 期 Vol. 40, No. 2
2021 年 3 月 Journal of Applied Acoustics March, 2021

⋄ 研究报告 ⋄

数控裁剪机切割刀壳体振动噪声预测分析 ∗

田 野 1 郭华忠 2 朱军祖 3 张文勇 2 李西兵 1†

(1 福建农林大学 福州 350002)
(2 广东瑞洲科技有限公司 佛山 528251)
(3 金川集团股份有限公司 金昌 737100)
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。
关键词：切割刀壳体；有限元；模态；声固耦合；振动噪声
中图法分类号: TS941.5 文献标识码: A 文章编号: 1000-310X(2021)02-0227-10
DOI: 10.11684/j.issn.1000-310X.2021.02.008

Prediction and analysis of vibration and noise of cutting cutter shell of CNC
cutting machine

TIAN Ye 1 GUO Huazhong 2 ZHU Junzu 3 ZHANG Wenyong 2 LI Xibing 1

(1 Fujian Agriculture and Forestry University, Fuzhou 350002, China)
(2 Guangdong Ruizhou Technology Co., Ltd., Foshan 528251, China)
(3 Jinchuan Group Co., Ltd., Jinchang 737100, China)

Abstract: 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.
Keywords: Cutting knife shell; Finite element; Modal; Acoustic-structure coupling; Vibration and noise

2020-11-30 收稿; 2021-01-10 定稿
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)
作者简介: 田野 (1995– ), 男, 安徽铜陵人, 硕士研究生, 研究方向: 先进制造与特种材料制备技术, 振动与噪声控制。
† 通信作者 E-mail: lxbwjj@163.com