| 초록 |
Most structures(e.g., vehicles, ships, buildings, and airplanes) are subject to random vibration loads. Various methods are used in order to evaluate the fatigue of structures under such random loads. In this paper, Dirlik’s method, a frequency domain random fatigue evaluation method, was compared with a random fatigue test for verification. A hot-rolled steel plate SPFH590 beam model was used for verification, and the random input was referred to ISO 16750-3. Dirlik’s method was used to predict fatigue life from response stress PSD, and calculated by using the frequency response function and Abaqus SW. In addition, two specimens, such as the target model, were used to measure each fatigue life using the vibration testing system and compared with the predicted life by using Dirlik’s method. The fatigue life via Dirlik’s method was similar to the random fatigue tests, and these results can be used as evidence to verify the reliability of Dirlik’s method. |
