The presented work aims at evaluating the results of uniaxial and multiaxial fatigue failure tests using velocity and acceleration measurements. A specimen containing damaging modes at different eigenfrequencies is introduced. The tests are conducted on an electrodynamic 3D-shaker system using a random vibration environment. Different fatigue times are observed between uniaxial and multiaxial excitation. Based on the velocity and acceleration measurements, fatigue damage values are calculated for each test. While the fatigue damage values of velocities are similar between uniaxial and multiaxial tests, large deviations can be detected when using accelerations as base for the calculation. Thus, experimental verification for recently proposed multiaxial fatigue damage calculations based on different vibrational quantities is made possible.

中文翻译：

---

使用模态速度进行多轴和单轴疲劳失效评估

所提出的工作旨在评估使用速度和加速度测量的单轴和多轴疲劳失效试验的结果。介绍了一个包含不同特征频率的破坏模式的样本。测试是在使用随机振动环境的电动 3D 振动器系统上进行的。在单轴和多轴激发之间观察到不同的疲劳时间。根据速度和加速度测量值，计算每个测试的疲劳损伤值。虽然单轴和多轴试验的速度疲劳损伤值相似，但在使用加速度作为计算基础时可以检测到较大的偏差。因此，最近提出的基于不同振动量的多轴疲劳损伤计算的实验验证成为可能。