Connection design of bending stiffener of submarine cable
The flexible umbilical cable bending stiffener is generally connected to the floating body interface through its embedded bolt flange, so as to realize its installation at the connection between the flexible umbilical cable and the upper floating body. Since the bending stiffener is a dynamic application bending limiter, it is prone to connection failure at the connection. Failure of the connection will cause the bending stiffeners to detach from the upper floating body, which in turn leads to excessive bending and damage of the flexible tubing cable at the connection of the upper floating body.
The connection form of the bending stiffener of the flexible pipe cable is a composite form of form-locking connection and material-locking connection. The connecting device of the bending stiffener includes two parts: an inner connection and an outer connection. Internal connection means that during the forming process of the bending stiffener, a metal connector should be embedded in the main structure, and the embedded metal connector should be solidified inside the bend preventer to realize the connection. The outer connection is realized by connecting the protruding bolts on the inner connecting piece with the adapter flange on the floating body. Among them, there are two main forms of internal connection, one is the irregular metal connector, and the other is the connector embedded in the metal ring. Because the connection method of the metal ring is simple in structure, convenient to process, and can also meet the safety requirements, it is a commonly used internal connection form of curved reinforcement ribs.