Passive and semi-active heave compensator: Project design methodology and control strategies

Abstract

Heave compensator is a system that mitigates transmission of heave movement from vessels to the equipment in the vessel. In drilling industry, a heave compensator enables drilling in offshore environments. Heave compensator attenuates movement transmitted from the vessel to the drill string and drill bit ensuring security and efficiency of the offshore drilling process. Common types of heave compensators are passive, active and semi-active compensators. This article presents 4 main points. First, a bulk modulus analysis obtains a simple condition to determine if the bulk modulus can be neglected in the design of hydropneumatic passive heave compensator. Second, the methodology to design passive heave compensators with the desired frequency response. Third, four control methodologies for semi-active heave compensator are tested and compared numerically. Lastly, we show experimental results obtained from a prototype with the methodology developed to design passive heave compensator.

Semi-active tuned mass dampers under combined variable actions of friction forces and external disturbances

“…Also, these technologies can be used in other fields, for instance, (i) in industrial engineering, for storage tanks (Ciampi et al 2009), offshore platform for wind turbines (Sun and Jahangiri 2018;Jiang 2018;Hussan et al 2018), or offshore drilling structures for oil and gas extraction (Wu et al 2018;Sanchez et al 2017); and (ii) in mechanical engineering, for vehicles (Trikande et al 2017). Different aspects have been studied by researchers, such as the dynamic soil-structure interactions (Salvi et al 2018;Jabary and Madabhushi 2018), interactions and collision with adjacent constructions (Basili et al 2013), and multiple TMDs effects (Wen et al 2018;Lee 2019, 2018).…”