海工装备系泊缆索拉力监测技术与装置研究

目的 研究缆索拉力的实时监测技术和装置，以保障海工装备的系泊安全。方法 以导向滑轮的主承力构件滑轮轴为研究对象，在保证结构强度的前提下，对滑轮轴结构进行改造，研制缆索拉力监测新结构新装置，将求解大径长比滑轮轴剪力问题转化为测量局部特征点的单向变形，并通过实尺度试验得到标定系数，间接推算缆索拉力，将试验数据与有限元计算结果进行对比，验证监测方法的可行性和精确度。结果 经过仿真分析与试验标定表明，滑轮轴特征点的变形与缆索拉力之间存在线性关系，以缆索拉力280 kN为界，可分段线性拟合缆索拉力标定系数，测点1系数为0.312 4和0.137 6，测点2系数为0.2699和0.098 2。结论 本文研究的监测技术和装置能够较为准确地监测海工装备系泊缆索的实时拉力，兼具高可靠性、低成本、易实施的特点。

Monitoring Technology and Device of Marine Equipment Mooring Cable Tension

The main way of mooring marine equipment is that the mooring cable passes through the guide pulley to realize the connection between the cable winder on the ship and the bollard of the wharf. The work aims to study the real-time monitoring technology and device of cable tension to ensure the mooring safety of marine equipment. With the pulley shaft, the main load-bearing member of the guide pulley, as the research object, the pulley shaft structure was reformed on the premise of ensuring the structural strength, and new structures and devices for monitoring the cable tension were developed. Solution to shear problem of the pulley shaft with large aspect ratio was transformed into measurement of the unidirectional deformation of local characteristic points, and the calibration coefficient was obtained through the full-scale test, and the cable tension was indirectly calculated. The feasibility and accuracy of the monitoring method were verified by comparing the test data with the finite element calculation results. Through simulation analysis and experimental calibration, it was shown that there was a linear relationship between the deformation of the characteristic points of pulley shaft and the cable tension. The cable tension calibration coefficient could be fitted linearly in segments with the cable tension of 280 kN as the boundary. The coefficients of measuring point 1 were 0.312 4 and 0.137 6, and the coefficients of measuring point 2 are 0.269 9 and 0.098 2. The technology and device established in this work can accurately monitor the real-time tension of mooring cables of marine equipment, and have the characteristics of high reliability, low cost and easy operation.