Some equipment fault measurement points are difficult to determine. Thus, this study proposes a method using energy flow and transfer path to select sensitive measurement points. Firstly, based on the energy flow theory of the shell, the energy flow is taken as the physical quantity to describe the energy transfer of the structure vibration, and the energy-based transfer path analysis method is established. Secondly, the simulation model of the finite element energy flow was established by focusing on the NC turret, and the vector image of the energy flow transfer path of the NC turret shell was created. For the relationship between the vector images of the experimental and simulation energy flows, the validity of the finite element energy flow simulation results is verified. Lastly, three abnormal areas of the NC turret shell are identified by comparing and analyzing the energy flow vector images of the NC turret in the healthy and fault states, taking the poor meshing fault of the grooves as an example. By choosing nine test points in the abnormal areas and calculating the distribution rate of the transfer paths between the test points to the joint surfaces of the fluted disc, the energy flow distribution rate of the different fault positions to the test points is obtained. Calculation results enabled us to identify three measuring points that can accurately distinguish the fault location for a typical fault mode. This research combined energy flow theory and transfer path analysis method to determine the vibration fault sensitive measuring points of NC equipment. The proposed method is practical in the field of fault diagnosis and has broad application prospects.

中文翻译：

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基于能量流和传递路径的数控转塔振动故障敏感测量点研究

一些设备故障测量点很难确定。因此，本研究提出了一种利用能量流和传递路径选择敏感测量点的方法。首先，基于壳体的能量流理论，以能量流为物理量来描述结构振动的能量传递，建立了基于能量的传递路径分析方法。其次，以数控转塔为重点，建立了有限元能量流的仿真模型，建立了数控转塔壳体能量流传递路径的矢量图像。对于实验能量流和模拟能量流的矢量图像之间的关系，验证了有限元能量流模拟结果的有效性。最后，通过比较和分析正常状态和断层状态下数控转塔的能量流矢量图像，确定了数控转塔壳体的三个异常区域，以沟槽的啮合不良为例。通过在异常区域中选择9个测试点并计算测试点到沟槽盘接合面之间的传递路径的分布率，可以得出不同故障位置到测试点的能量流分布率。计算结果使我们能够确定三个测量点，这些测量点可以准确地区分典型故障模式的故障位置。本研究结合能量流理论和传递路径分析方法，确定了数控设备振动故障敏感的测量点。