减震

Remove peak loads in crane and rigging.

Operational Challenges

  • Dynamic load on crane or load at lift-off for lifts in air.

  • Limited operational weather window because of harsh weather conditions.

  • Any operation where peak loads may arise, in air and subsea.

  • Potential re-entry of load being lifted represents a significant risk.

Cranemaster Benefits

  • Increasing the operational weather window of the lifting operation.

  • Protection of crane and lifted structure in all lifting phases by reducing the dynamic amplification factor (DAF).

  • Immediate response to potential dangerous loads.

  • Enabling crane to maintain its lifting capacity at increased wave height.

Cranemaster® protects the crane and the lifted structure by reducing the dynamic amplification factor (DAF) in all lifting phases.

Offloading from a supply vessel or barge with and without Cranemaster®

Manifold weight: 50T • Significant wave height (Hs): 2.0m • Wave period (Tz): 8sec. • Hoisting speed: 0.3 m/s.

This Orcaflex simulation shows a lift-off situation from a barge. The crane is sitting on a fixed platform, but the principles are the same also if the crane is mounted on a moving vessel.

Without Cranemaster® (to the left):
Significant snap load during lift-off, in this case around 85T. This corresponds to a DAF of 1.7.

With Cranemaster® (to the right):
Snap load is avoided and the DAF is reduced to around 1.1.

For cranes with a slow lifting speed, there may be a risk of re-contact between the structure and the barge. Some Cranemaster® units can be equipped with a quick-lift system which will pull in the piston and thereby avoiding the re-contact.

Cranemaster Shock absorption Shock absorber

Shock absorption since 1983

The first applications of Cranemaster® units back in the early 1980s were related to shock absorption and since then small units with SWL of a few ton up to large units with SWL of 500 ton have been developed.

Please contact us for discussions of specially designed Cranemaster® units used for shock absorption.

cranemaster-shock-absorption-shock-absorber-norsok-mob-boat

MOB boats, lifeboats and NORSOK R-002

Over the years Cranemaster has delivered a number of different units for deployment/retrieval of MOB, work boats, and lifeboats. In the NORSOK R-002, edition 2. issued in September 2012 there are strict rules for shock absorption during lifting of MOB boats and lifeboats.

Cranemaster® is an excellent solution to these requirements, and is well suited in cases where the use of elastic pennant is impractical or does not give sufficient dampening.

Featured References – 减震

2018-10-10T08:27:36+01:00

新西兰残骸拆卸操作

客户挑战: MV Rena 在丰盛湾的 Otaiti (Astrolabe Reef) 触礁后,此事故成为新西兰最严重的海上环境灾难之一。 清理过程不但困难而且有风险。 Cranemaster 解决方案: Cranemaster 在清理残骸之前协助进行了计算和起重模拟。 实际操作时,在切割和起吊残骸住宿区的上半部分时使用了两个 Cranemaster® 被动型海浪补偿器(SWL 400 吨)对船只移动进行补偿。 操作期间 Cranemaster 还为服务技术人员提供了协助。 详情: 关于 Rena 沉船清理工作的更多信息请见 www.renaproject.co.nz。 [...]

2018-10-10T08:28:28+01:00

STL 浮标系统定制减震器

客户挑战: 将装载浮标提升到船舶停靠舱时,起重装置会因船舶运动产生峰值负载。 Cranemaster 解决方案: 为缓解和避免 过量负载,Cranemaster 设计了一个特殊装置,可作为过载保护装置永久性地安装在装载浮标的顶部。 负载超过预设压力时,Cranemaster® 减震器会随之伸缩。 这保证了装载浮标实现平稳且安全的停靠。 详情: 这些装置 现已经运行多年,执行了认证机构要求的检查和检修。 Cranemaster® 减震器 安装在 Vincent 和 Reliance 油田的 APL 装载浮标上。

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