基于AHP方法的行星齿轮箱箱体阻尼敷设方案评价研究

Evaluation of Damping Laying Scheme of Planetary Gear Box based on AHP Method

针对行星齿轮箱箱体阻尼敷设方案减振效果评价问题,以某型行星变频调速齿轮箱为研究对象,基于层次分析法(AHP)建立阻尼敷设方案评价指标体系,以阻尼层厚度和阻尼材料损耗因子作为方案的定量指标,并结合方案的定性指标多方案对比分析,选出最优的阻尼敷设方案。建立了5种箱体阻尼敷设方案的有限元模型,仿真分析得出模型机脚测点的振动加速度级。结果表明:阻尼层厚度和阻尼材料损耗因子对测点处机脚振动加速度级大小影响显著;选用SA-3为阻尼材料、阻尼厚度为14 mm的方案5,经指标体系评价确定为最优阻尼敷设方案,较原模型振动加速度级峰值平均下降了1.64 dB,优于其他4种阻尼敷设方案,验证了评价方法的正确性。

Aiming at the vibration reduction effect evaluation of damping laying scheme of planetary gear box,a certain type of planetary variable frequency and speed regulating gear box was taken as the research object,the index system of damping laying scheme was established based on analytic hierarchy process(AHP),and the damping layer thickness and damping material loss factor were taken as the quantitative indexes of the scheme.Combined with the qualitative index of the scheme,the optimal damping laying scheme was selected by comparing and analyzing the schemes.The finite element model of the damping laying scheme of five boxes was established,and the vibration acceleration level of the model foot at the measuring point was obtained by simulation analysis.The results show that the damping layer thickness and damping material loss factor have significant effects on the vibration acceleration level of the foot at the measuring point.The scheme 5 is selected as the optimal damping laying scheme by the index system,in which the damping layer thickness is 14 mm and the damping material is SA-3.The model peak vibration acceleration level decreases by 1.64 dB on average compared with the original model,which is better than other 4 damping laying schemes,verifying the correctness of the evaluation method.