Vibroacoustic dataset of DGEN 380 turbofan test bench

This dataset focuses on vibration and acoustic signals from a test bench based on the DGEN 380 turbofan, a small engine compared to those typically used in commercial aircraft. It provides a unique opportunity to explore the dynamics of a turbofan engine under different configurations, offering insights into vibroacoustic interactions and the impact of structural elements, such as Outlet Guide Vanes (OGVs), on the engine behavior. The test bench features a planetary gearbox with three planets, where the ring serves as the input, the sun as the output, and the carrier remains fixed. Key characteristic frequencies can be tracked, including the blade passing frequencies (BPF) and shaft-related frequencies for both the low-pressure (LP) and high-pressure (HP) shafts. The instrumentation setup includes three 3-axis accelerometers (A/34-2) positioned along the engine at specific locations, measuring vibration in the x, y, and z axes. The setups also include microphone distributions according to ISO 3746 standards and specific placements around different engine components, such as the rotor and stator. Four measurement configurations were employed, considering both the presence and absence of OGVs. The dataset includes acoustic and vibration signals for each configuration across different operational regimes, including idle, intermediate speeds, and full throttle. This controlled test environment allows for detailed analysis of the interaction between vibration and acoustic phenomena, providing insights that are valuable for diagnosing and improving turbofan engine performance.

本数据集聚焦于基于DGEN 380涡扇发动机的试验台所产生的振动与声学信号——该发动机相较于商用飞机常用发动机而言属于小型动力装置。本数据集为探究不同配置下涡扇发动机的动力学特性提供了独特契机，有助于深入了解振动声学交互机制，以及出口导流叶片（Outlet Guide Vanes, OGVs）这类结构部件对发动机运行特性的影响。该试验台搭载具备三个行星轮的行星齿轮箱，其中齿圈为输入端、太阳轮为输出端，行星架保持固定。可追踪的关键特征频率包括叶片通过频率（Blade Passing Frequency, BPF），以及低压（Low-Pressure, LP）和高压（High-Pressure, HP）轴相关的轴频。仪器布设方案包含三台三轴加速度计（型号A/34-2），沿发动机特定位置布置，可采集x、y、z三个轴向的振动信号。该布设方案还包含符合ISO 3746标准的麦克风阵列，以及针对转子、定子等不同发动机部件的专属安装位置。本次采集共设置四种测量配置，分别涵盖出口导流叶片（OGVs）加装与移除两种工况。本数据集包含每种配置下，不同运行工况（怠速、中速、全油门）的声学与振动信号。这种可控的试验环境支持对振动与声学现象间的交互机制开展精细化分析，所得结论可为涡扇发动机的故障诊断与性能优化提供重要参考。