The volumetric expansion of freezing pore water is widely assumed to be a major cause of rock fracture in cold humid regions. Data from experiments simulating natural freezing regimes indicate that bedrock fracture results instead from ice segregation. Fracture depth and timing are also numerically simulated by coupling heat and mass transfer with a fracture model. The depth and geometry of fra...

Abstract In the world of oil and gas, there will definitely be a structure for either production process, exploration so on. The consists three types, namely fixed structure, floating moored structure. Floating structures can best option in terms cost time. Things that interfere with when operating are environmental loads. One example its operation is offloading, it offloading side by or tandem...

Seasonal frost or permafrost soils may encounter heave thaw settlement resulting from atmospheric temperature changes and/or heat emanating the resource-carrying pipeline. Notably, these soil movements can damage Thus, various ground stabilization methods have been developed to prevent onset of phenomena in frost-susceptible soils, and application thermosiphons is a representative method. Recen...

In this paper, the main goal is to reduce the heave motion between a surface effect ship (SES) and a wind turbine in order to safely transfer equipment and person to SES. For this purpose, an LQR control system is designed to damp the vertical motion of the surface effect ship in critical sea states including high-frequency and high amplitude regular waves as well as high frequency irregular wa...

The paper presents results from the Collaborative Computational Project in Wave Structure Interaction (CCP-WSI) Blind Test Series 2. Without prior access to physical data, participants, with numerical methods ranging low-fidelity linear models fully non-linear Navier–Stokes (NS) solvers, simulate interaction between focused wave events and two separate, taut-moored, floating structures: a hemis...

The existence of a moonpool may affect motion characteristics and stability drillship. This paper presents numerical experimental study on the influence configuration performance drillship under condition constant displacement. Ship hydrostatics three-dimensional (3D) potential flow theory are employed to calculate static curves (GZ curves) response amplitude operators (RAOs) with conjoined dou...