多头电脑刺绣机主横梁振动分析及优化

Vibration Analysis and Optimization of Main Beam of Multi-head Computerized Embroidery Machine

针对电脑刺绣机主横梁振动过大的问题,提出一种提高主横梁固有频率来降低振动的方法,首先,通过Ansys软件对刺绣机进行模态分析及谐响应分析,然后通过Optistruct软件进行主横梁拓扑优化,得到主横梁单位密度云图,增加主横梁模型的关键部位厚度。最后,计算优化后模型的固有频率和振动幅值。结果表明:优化后主横梁一阶固有频率提升10%,谐响应振幅降低200%,优化效果较好。

The vibration of main beam of the computerized embroidery machine is too large.For solving this problem,a method is proposed to reduce vibration by improving the inherent frequency of main beam.First of all,the modal analysis and harmonic response analysis of the embroidery machine were carried out with Ansys software.Then,the topologic optimization of the main beam was conducted through the Optistruct software to get its unit density cloud chart.The thickness of critical part of the main beam model increased.Finally,after the model was optimized,the inherent frequency and vibratory magnitude of the main beam were calculated.The results show that the first-order inherent frequency of the optimized main beam increases by 10%,and harmonic response amplitude decreased by200%.The optimization effect is good.