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首页> 外文会议>International Symposium on Stability Control of Rotating Machinery(ISCORMA-4); 20070827-31; Calgary(CA) >Study on diagnostic indicators of gear tooth crack length and location in a virtual gear transmission
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Study on diagnostic indicators of gear tooth crack length and location in a virtual gear transmission

机译：虚拟齿轮传动中齿轮齿裂纹长度和位置的诊断指标研究

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摘要

A numerical simulation of the dynamic behaviour of a system is certainly a convenient means to perform preliminary testing of a diagnostic system, to support the interpretation of experimental results and to investigate on a wider range of operating conditions and defects. In this work the dynamic behaviour of a faulted gear transmission was simulated. The gear overall stiffness was evaluated statically as function of the gear angular position by means of FE models of the mating wheels and of the supporting structure, taking into account the deformation of the teeth under load and the presence of faults such as tooth cracks of different lengths and at different locations on the tooth flank. The so calculated meshing stiffness was employed to simulate the different dynamic behaviour of the cracked gears by means of a simplified lumped parameter 4 d.o.f. model of the gear transmission in steady state conditions. The numerical simulation tests were carried out in a Simulink environment, for different applied torques and gear angular velocities. The synchronously averaged acceleration signals produced by the virtual bench were processed by means of Matlab procedures and an original combination of diagnostic indicators for the identification of the different crack configurations is proposed.
机译：系统动态行为的数值模拟无疑是一种方便的方法，可以对诊断系统进行初步测试，支持对实验结果的解释以及对更广泛的运行条件和缺陷进行研究。在这项工作中，模拟了故障齿轮传动的动态行为。通过配合轮和支撑结构的有限元模型，静态评估了齿轮的整体刚度，作为齿轮角位置的函数，同时考虑了负载下齿的变形以及是否存在诸如不同齿隙的缺陷长度和齿侧面的不同位置。如此计算出的啮合刚度用于通过简化的集总参数4 d.o.f模拟裂纹齿轮的不同动态行为。稳态条件下的齿轮传动模型。在Simulink环境中针对不同的施加扭矩和齿轮角速度进行了数值模拟测试。通过Matlab程序对虚拟工作台产生的同步平均加速度信号进行处理，并提出了诊断指标的原始组合，用于识别不同的裂纹形态。

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