Evaluation of the Hi-Dro Cushion (Rich) Fendering System.
Final technical note Jul 65-Mar 74,
CIVIL ENGINEERING LAB (NAVY) PORT HUENEME CALIF
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The Hi-Dro Cushion fendering system is a series of clustered fluid-filled vinyl cylinders mounted vertically between two bearing surfaces. The vinyl cylinders cells have an orifice at either end. In this application the cells are partially submerged. The surface end of the cell has a small orifice which permits initial charging of the cell with seawater, gravity charging during operation, and drainage on withdrawal of this system. The opposite end possesses an orifice of larger proportions and controlled design diameter. Its function is to moderate the duration of discharge from the cell when a force is applied to its walls. This attenuation of a force by controlled discharge is the basic operating principle of the system. Approximately 120 feet of this innovative fendering system was installed at Port Hueneme, CA, in April 1970. A final inspection was completed after 3 years of service the fender has performed satisfactorily and is a balanced design, the limiting factors being abrasion of the timber bearing surfaces and corrosion of fasteners in the assembly.
- Marine Engineering