海底脐带缆铺设系统动力学仿真及张力补偿研究(英文)

For studying the dynamic performance of subsea umbilical cable laying system and achieving the goal of cable tension and laying speed control,the rigid finite element method is used to discrete and transform the system into a rigid-flexible coupling multi-body system which consists of rigid elements and spring-damping elements.The mathematical model of subsea umbilical cable laying system kinematic chain is presented with the second order Lagrange equation in the joint coordinate system,and dynamic modeling and simulation is performed with ADAMS.The dynamic analysis is conducted assuming the following three statuses:ideal laying,practical laying under wave disturbance,and practical laying with tension compensation.Results show that motion disturbances of the laying budge under sea waves,especially with heaving and pitching,will cause relatively serious fluctuations in cable tension and laying speed.Tension compensation,i.e.,active back tension torque control can restrict continuous tension increasing or decreasing effectively and rapidly,thus avoiding cable breach or buckling.     

船用蠕动式连续拖曳行走装置运动分析及优化

为了实现大型海洋工程装备在船舶或浮体等运动物表面的稳定、连续、快速行走运动,对船用蠕动式连续拖曳行走装置进行了研究。介绍了在模拟尺蠖蠕动基础上增加了交替拖曳功能的行走装置运动原理,并设计了相应的机械结构及液压驱动系统。对行走装置进行了运动分析,建立了以被拖体运动速度最大为目标,以液压系统流量限制为约束条件的优化数学模型,对行走装置垂向及横向运动时间进行了优化。最后通过某海底管线铺设装备上配置的行走装置样机试验,验证了其运动性能以及各环节运动时间对被拖体运动速度的影响情况。     

昱岭关隧道左洞初期支护大面积下沉处理方案的研究

本文对昱岭关隧道左洞进口段初期支护大面积下沉的原因进行了分析.根据下沉处理方案进行比较研究,选定了技术上可行,经济上合理,安全可靠的处理方案,顺利的处理了初期支护大面积下沉问题,对同类问题的处理具有一定的参考价值.     

隧道量测数据的回归分析及其在施工中的应用

文章对隧道围岩量测的数据处理，在理论上进行了较全面的阐述。并通过昱岭关隧道量测数据的计算实例，说明了量测及其数据处理在新奥法施工中的重要作用。