| 摘要 |
PURPOSE:To improve the reliability of the titled cable by forming a hard steel wire with the twisting pitch of 21-40 times as long as twice the distance from the center of the cable and an armored iron wire with the twisting pitch of 12- 16 times as long as twice the distance from the center of the cable. CONSTITUTION:The hard steel wire 3 to be a tensile strength body is formed with the twisting pitch of 21-40 times as long as twice the distance from the center of the cable and the armored iron wire 7 is formed with the twisting pitch 12-16 times as long as twice the distance from the center of the cable. When the value of P0/D0 is limited within the range of 12<=(P0/D0)<=16, the ratio of partial charge of tension to the tensile strength body 3 of the submarine optical cable is about 20% the whole load. When the value of P1/D1 is set up within the range of 21-40, the P0/D0 value of the armored iron wire 7 can be suppressed to 0.5% expansion or less against 12-16 times the using load and cable winding and production can be attained easily, so that the reliability is improved. |
