摘要
在平面网片上装配沉子的网片沉降系列试验表明，在围网网衣上装配沉子能使下纲得到更快的平均沉降速度，这取决于网衣载荷的装配位置和载荷比。第２条沉子纲的最佳装配位置应在网衣中下部，网高的０．５３６～０．８５０范围内，具体取决于网衣载荷与总载荷之比，比值越大，装配位置越下移。网衣载荷可分解过重的下纲载荷，减轻括纲绞机拉力，有利于网壁下垂保持良好网形。
A sieries of sinking experiments were carried out using plane netting rigged with load. The test indicates that the lead line obtains a mean sinking speed when the netting is rigged with sinker. The speed depends on the riging position of the sinker and the ratio of the load. The riging position of the second lead line should be at middle-low part of netting ranging from 0.536～0.850 net height, the exact position depends on the ratio of netting load to the total load, and the bigger the ratio is, the lower the position moves. Netting load can lighten the lead line of its over load and the puring line of its rauling force, So as to keep good net shape when the net wall is hanging down.
出处
《中国水产科学》
CAS
CSCD
1998年第3期82-87,共6页
Journal of Fishery Sciences of China
关键词
围网
网衣载荷
沉降载荷分布
purse seine, netting load, distribution of sinking load
