集成灶振动原因分析及优化

Analysis and Optimization of Vibration Causes in Integrated Stove

本文以某集成灶炉头抖动为例,分析了产生振动的具体原因。该集成灶在正常测试时,出现明显的炉头晃动,通过对结构件加固增加连接等手段,均无法找到振动的原因。该机型在烟机转速为(800~1000)r/min时振动异常明显,推断有共振的可能。经过有限元仿真,对集成灶模型进行模态分析后发现,集成灶第九阶固有频率18.74 Hz,与烟机转速对应的振动频率为(13.33~16.67)Hz相近,有共振的可能。通过对风柜结构进行修改,增强外壳刚度,添加连接件,将该结构的第九阶频率提升至24.15 Hz,有效避开共振频率,从而解决了炉头抖动问题。通过仿真方法对结构进行模态分析,可以直接找到炉头振动的原因,并为后续的修改指明方向,该方法减少了试验次数,具有很好的推广价值。

This article takes the shaking of a certain integrated stove head as an example toanalyze the specific reasons for the vibration.During normal testing,the integrated stove showed significant shaking of the stove head.However,the cause of the vibration could not be identified by strengthening the structural components and adding connections.The vibration of this model is significantly abnormal when the fan speed is between 800 r/min and 1000 r/min,indicating the possibility of resonance.After finite element simulation,modal analysis was conducted on the integrated stove model,and it was found that the ninth natural frequency of the integrated stove was 18.74 Hz,which is similar to the vibration frequency corresponding to the fan speed of(13.33~16.67)Hz,indicating the possibility of resonance.By modifying the structure of the wind cabinet,enhancing the stiffness of the shell,and adding connectors,the ninth order frequency of the structure was raised to24.15 Hz,effectively avoiding resonance frequencies and solving the problemof furnace head shaking.By using simulation methods toperformmodal analysis on the structure,the cause of furnace head vibration can be directly identified and the direction for subsequent modifications can be pointed out.This method reduces the number of experiments and has good promotion value.