The Design of Dual-Box Pier Anti-Collision Device Based on Rubber Cushion

Ship anti-collision device with flexible box structure is a new protection to pier device. By simplifying the rubber cushion dual-box pier ship anti-collision device as elliptic physical model and by simplifying the elliptic rubber cylindrical air cushion as linear elastic spring element, this paper can build the relationships between torque equation, elliptic structure parameters and equivalent elastic coefficient under different loading force. When outer steel ring takes a small displacement translation, the reverse force is only related to parallel direction of displacement and has a linear relationship with displacement. Making an analysis on elastic response of translational-rotational device, it can be approximated as a pure rotation curve under certain conditions. And the equivalent elasticity coefficient is only related to translational-rotational joint effect. The results will help the flexible dual-box ship anti-collision device to apply.