气囊平移、浮吊整体吊运沉箱下水工艺应用

叙述了气囊平移、浮吊整体吊运沉箱下水施工工艺的方案设计和实施及给工程施工带来的经济效益。     

侯月线技术站扩能改造方案的探讨

依据侯月线嘉峰站及与其接轨的寺河装车点的既有设备概况和寺河装车点需要增加的装车能力,提出了寺河装车点与嘉峰站的改造方案,并对改造前后的效益作了定性、定量的分析。     

开体式挖泥船液压缸及甲板铰链的设计分析

介绍了开体式挖泥船上开体液压缸及主甲板铰链的设计方法,并以某小型1800m3开体泥驳为例,就船上开体液压缸、主甲板铰链、液压缸铰链的力学原理、受力计算、结构型式及尺寸校核等作详细说明,为开体式挖泥船的设计提供了一定的参考价值及借鉴作用。     

中型沉箱出运、安装方案

人们普遍认为采用半潜驳出运、安装超过2000 t的大型沉箱,采用浮吊船出运、安装低于500 t小沉箱较为适宜,而对500~2000 t之间的中型沉箱采用何种方案出运、安装并未有统一意见。通过广西北海LNG接收站陆域形成工程,从环境、经济、技术方面进行分析比较,提出采用大型浮吊船（起重船）配合平板方驳出运、安装中型沉箱的优越性,并探讨施工措施。     

新型雷达液位传感器在挖泥船装舱过程中的应用

雷达液位传感器是利用微波脉冲的发射与接收来测量液体的深度。雷达液位传感器分接触式和非接触式两种形式。介绍西门子LR 460雷达液位传感器的工作原理和系统组成。阐述该设备的安装和信号采集,并阐述波形分析和修正措施。可供参考。     

延长矿肥漏斗车的使用年限

调查了矿肥漏斗车各部分的腐蚀情况,对大修改造样车进行了冲击寿命试验.结果表明,经过大修改造的漏斗车可延长有效使用期.     

海上大型铺管船"大力士"轮的改造

海上大型铺管船是海洋工程船的一种,是海洋管道施工的基本设备,集起重、管道铺设于一身的多功能新型船舶。友联船厂在和中海油合作并成功改造了"南海五号"、"南海二号"和"南海六号"平台后,又和美国环球工业公司在海洋工程上取得了良好合作。文章通过对"大力士"轮成功改造的总结,对几个关键过程进行了简要描述。     

四角桅内力计算方法

四角桅作为一种特殊结构的起重桅,其内力是一空间超静定系统,以某实船的四角桅内力计算为例,介绍一种简便实用的计算方法,可作为船舶设计者借鉴。     

Nonlinear hydrodynamic responses of submerged moving payload in vicinity of a crane barge in waves

The wave interaction with a submerged cylindrical payload subjected to constrained motions in presence of a nearby floating crane barge is investigated in the three-dimensional numerical wave tank using a fully nonlinear potential flow model in the time domain. Numerical simulations are carried out to investigate the hydrodynamic features of this submerged payload under pendulum motion in water waves as well as while it moves towards the sea bed at a constant vertical velocity. It is known that the presence of multiple side by side floating bodies in waves can create significant drift motion. In the present study the similar drift motion is observed for the side by side floating barge and submerged payload and it appears that the submerged payload under constrained motions may face a very large mean drift motion of nearly seven times that of the incident wave amplitude in the beam sea upstream condition. Emphasis is also given towards investigating and understanding the influences of natural frequency of the payload and shielding effect due to the presence of the floating barge. It is found that natural frequency coupled with shielding effect generates remarkable low frequency components in payload responses both in the head sea and the beam sea situations. The effect of different cable lengths, wave maker frequencies and downward moving velocities on payload responses under several geometric setups are studied and compared, and interesting features such as increased low frequency movement of the payload near the natural frequency region and existence of considerable low frequency motions even at a greater depth (while the payload is quite below the free surface) are observed.     

提升机料斗避免粘料设计方法

针对斗式提升机料斗底部易黏结黏性物料的现象，对黏结积料进行动力学分析．建立起黏结积料在卸料过程中能自动脱离料斗的驱动滚筒、料斗和提升物料之间参数的约束关系。为克服直接利用多元非线性优化方法难以得到最优参数的缺陷，结合工程特点给出了简洁的参数确定方法。