Computational Modeling of Torpedo Base Penetration at Seabed Using Piezocone Tests

Resumo

This study presents a comprehensive investigation into the dynamics of torpedo anchor penetration at the seabed, leveraging real marine soil data obtained from Piezocone Tests (CPTu tests) provided by a prominent Brazilian oil and gas company. Recognizing the significance of accurate soil characterization, particularly in marine environments, the research meticulously characterizes undrained shear strength in a piecewise manner, thus addressing a key limitation of existing methods. By overcoming the one-layered soil constraint inherent in True's method, the study offers a more comprehensive understanding of torpedo anchor behavior across diverse soil stratifications. The utilization of CPTu tests provides several advantages, including real-time data acquisition, continuous profiling, and minimal soil disturbance, enabling precise modeling of torpedo anchor penetration. This approach not only enhances the accuracy of anchor penetration depth predictions but also contributes to a more robust analysis of seabed stability and anchor performance. To further refine the computational methodology, the study integrates the fourth-order Runge-Kutta technique, enhancing the precision of numerical simulations and facilitating more reliable predictions of anchor behavior. In addition to analyzing anchor penetration depths, the study comprehensively examines the balance of forces during the penetration phase, shedding light on the dynamic interplay between various factors influencing anchor embedment. Detailed torpedo base velocity profiles, analyzed depth-wise, provide valuable insights into the velocity distribution and its implications for seabed interactions. Furthermore, comparative analyses between controlled velocity deployment and free-fall installation scenarios offer practical insights into optimizing anchor performance and enhancing seabed stability in offshore engineering applications. By integrating real marine soil data with advanced numerical techniques and comprehensive analyses, this research significantly advances our understanding of torpedo anchor dynamics. The insights gleaned from this study have profound implications for the design and implementation of seabed installations, informing more efficient and reliable practices in offshore engineering.