| Vibration stress relief technology is an effective method to eliminate welding residual stress, improve the service life of components and ensure structural stability. During the construction of jack-up platform pile fixing frame, welding construction causes a large amount of residual stress in the pile fixing frame. Residual stress is one of the important reasons for the size change, loss and failure of the pile fixing frame. It will greatly reduce the fatigue life of the platform. Therefore, it is very important for the safety of the platform to eliminate the internal residual stress after the construction of the pile fixing frame. In this paper, a 100 t section of the pile fixing frame is taken as the research object, and a special vibratory stress relief device is used to apply exciting force to the pile fixing frame. The residual
stress level near the main weld before and after the vibratory stress relief is measured. Through comparative analysis, it is found that the vibratory stress relief technology can effectively reduce the residual stress generated during the welding process of the pile fixing frame, achieve the effect of adjusting, homogenizing, and reducing the level of residual stress, ensure the overall stability of the structure, and help improve the service life of the platform. |
