After serious damage to a propulsion installation, EMHA was called in to identify the cause of the problems and realise a durable solution. Through a combination of diagnosis, engineering and execution, we drastically reduced the vibration levels. The result is a significantly more reliable installation with restored operational reliability.
Situation
The client was experiencing recurring damage to components of the propulsion engines aboard a vessel. Components fractured as a result of extremely high vibration levels, leading to an increased risk of failure and costly repairs. The challenge lay in identifying the underlying cause and realising a structural solution within the existing installation. The client’s objective was to substantially reduce the vibrations and prevent further damage to the propulsion installation.
Approach
- EMHA started the process with extensive vibration measurements, fully mapping the propulsion installation. Based on this data, we drew up targeted advice for both the foundation and the configuration of the propulsion line.
- Our engineers then developed a new configuration, substantiated with FEM analyses and calculations to ensure optimal force distribution and stiffness.
- The execution was carried out by our technicians, with the existing skids being modified and repositioned on Chockfast Orange. The configuration was fitted with fitted bolts, and where necessary, engines were flexibly mounted in accordance with the specified requirements.
- After assembly and precise alignment, carried out under the supervision of a classification society, the entire system was tested again during a sea trial to verify the effectiveness of the modifications.
Result
The modifications resulted in a reduction of vibration levels by approximately two thirds compared to the original situation. This effectively eliminated the direct cause of the damage and significantly improved the reliability of the propulsion installation.
Thanks to the integral approach, in which diagnosis, engineering and execution were seamlessly aligned, the maximum result was achieved within the existing constraints of the vessel. The client now has a more stable installation, with a greatly reduced risk of damage and downtime, and a sustainably improved operational performance.
