分度圆裂纹齿轮副动态特性及故障诊断

Dynamic Performance and Fault Diagnosis of Gear-pair with Reference Circles' Cracks

将有限元软件ANSYS建立的齿轮有限元模型和多体动力学软件SIMPACK建立的齿轮副啮合模型进行联合仿真,轮齿有限元模型计算其单齿刚度,生成齿轮副啮合综合刚度,并导入齿轮副SIMPACK模型;齿轮副啮合模型不采用Gear-pair力元,通过移动Marker、函数表达式以及输入函数等实现啮合作用;最终利用广义共振、共振解调技术进行故障诊断。仿真结果表明,ANSYS计算的啮合综合刚度与SIMPACK结果相差2.65%;啮合振动模型计算结果与Gear-pair力元结果误差控制在10%以内。可通过故障特征频率定位故障、采用幅值衡量严重程度,最终达到故障诊断的目的。

The FE model of the gear,established by finite element software ANSYS,and the dynamic model of gear-pair,established by multi-body dynamic software SIMPACK,were combined to simulate.The gear＇s FE model was used to compute the stiffness of the teeth,which was taken to calculate the integration stiffness of the gear-pair and imported to the SIMPACK model of gear-pair.Without the gear-pair force element,the gear-pair SIMPACK model was built through moved Markers,function expressions and input functions,to realize the meshing behavior,with techniques of generalized resonance and demodulated resonance,the faults could be diagnosed.The results showed that the difference of meshing integration stiffness between ANSYS and SIMPACK calculation was 2.65 percent.The error between meshing-vibration model and Gear-pair force element was controlled under 10 percent.The type of faults could be located by the frequency and the security level could be measured by the amplitude to reach the purpose of faults＇ diagnosis.