高速包装机传动系统声学贡献分析与降噪优化

Acoustic contribution analysis and optimization of noise reductionfor transmission system of high-speed packaging machine

传动系统引起的机械结构振动噪声问题是高速机械设备研究中需要解决的关键问题之一。本文结合振动噪声实验与仿真分析研究了高速包装机传动系统振动噪声源的定位及降噪优化问题。建立了高速包装机传动系统振动噪声实验装置,构建了对应的刚-柔耦合动力学仿真分析模型,基于实验测试数据进行了载荷识别并验证了模型的准确性与可靠性。以该模型为基础,结合模态参与因子及声学贡献量分析方法,明确了高速包装机传动系统声学贡献量较大的模态频率和板面区域,并对传动系统的设计进行了改进和优化。结果表明:通过模态贡献量分析和板面贡献量分析可以快速准确地定位噪声问题区域,以服务于相应机械结构设计的优化;在声学贡献量基础上进行结构优化可以有效抑制高速包装机传动系统的振动噪声。

The vibration and noise of mechanical structures caused by transmission system is one of the key problems that need to be solved in the research of high-speed mechanical equipment.This study investigates the location and optimization of vibration and noise reduction of a high speed packaging machine transmission system based on coupling vibration and noise experiment and simu-lation analysis.The vibration and noise test device and the rigid-flexible coupling dynamic simulation model of the high-speed pack-aging machine′s transfer mechanism and its transmission system is established.Based on the experimental data,the load identifica-tion is carried out and the accuracy and reliability of the model is verified.Based on the model,combined with modal participation factor and acoustic contribution analysis method,the modal frequency and plate area with large acoustic contribution of the highspeed packaging machine transmission system are analyzed,which improves and optimizes the design of the transmission system.The results show that modal contribution analysis and plate contribution analysis can locate the noise problem area quickly and accu-rately to serve the optimization of the corresponding mechanical structure design.The vibration and noise performance of the opti-mized high speed packaging machine drive system is improved significantly.