In a series of accidents related to structural safety, personnel load and speed since 2005, the defects of the existing free-fall lifeboat design have been revealed. To this end, the Norwegian Oil and Gas Association (OLF) has launched a joint industrial project to find the reasons behind the accident.
The project shows that design standards have been established in accordance with the SOLAS (Safety of the Sea Life Safety) regulations. The standard was established based on the lifeboat test performance thrown into calm waters, with a drop height that is significantly lower than the height of the main body of the Norwegian continental shelf. Lifeboats are subject to greater load and damage due to the fact that actual waves and drop heights exceed the assumed value, which also explains the design flaws exposed in accidents since 2005.
As part of the research findings, DNV was invited to develop new design standards for free-fall lifeboats. The new Free Fall Lifeboat Design – DNV-OS-E406 standard was released in 2009 and revised the following year. According to the modern limit state design method (rather than the performance during the drop test), the standard was quickly accepted by the Norwegian offshore industry. The Norwegian Petroleum Safety Agency uses this standard as a specification for free-fall lifeboat design.
Lifeboats currently used in Norwegian continental shelf waters are constructed to DNV standards.
Currently, the standard is being further revised to incorporate new computational methods such as computational fluid dynamics to measure extreme loads under more severe conditions.
Ship lifeboat safety
Currently, ship lifeboat deployment and recovery systems are developed in accordance with SOLAS design standards. DNV recommends that the safety of the lifeboat of the ship can be enhanced by transplanting the lifeboat design of the offshore platform. With a little modification, the DNV-OS-E406 can be easily adapted to the free-fall lifeboat on board.
Olav Rognebakke, head of the DNV ship's hydrodynamics and stability department, said: "If the shipping industry decides to adopt our free-fall lifeboat standard, I believe that the safety of the ship's lifeboat will be an important step."
Wall Panel Roll Forming Machine,Roof Panel Roll Forming Machine,Sandwich Panel Making Machine,Pu Sandwich Panel Machine
Yuanding Science And Technology Co., Ltd. , http://www.wyrollformingmachine.com