机架部件的稳定性是成纱质量的关键因素.通过ANSYS Workbench对细纱机机架进行模态分析和随机振动分析,得到机架的前8阶的振型以及随机振动位移响应值,并根据分析结果对机架部件作了适当改进并进行仿真分析.结果表明:机架的前3阶固有频率分别提高了27.7％ 、47.9％ 、23.6％;机架X、Y、Z方向瞬间增大峰值处的功率密度谱值分别减小了65.9％ 、41.8％ 、83.5％.该结果可为细纱机机架的结构优化设计提供参考.%The stability of rack component is a key factor of the quality of yarn .Modal analysis and random vibration analysis of spinning frame rack were carried out with the help of ANSYS Workbench .First eight bands of vibration form and random vibration displacement response values were gained . According to the analysis results , the improvement of spinning frame rack was implemented and its simulation analysis was conducted ,too .The analysis results show that first three natural frequencies of the rack increase by 27 .7％ ,47 .9％ and 23 .6％ respectively ,and the PSD values at the point of increasing peak quickly along the direction of X , Y , Z decrease by 65 .9％ ,41 .8％ and 83 .5％ respectively .The results provide a reference for the optimal design of spinning frame rack.
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