Andre Galea’s Post

The Crucial Role of Natural Period in Jack-Up Safety In structural analysis, the natural period is the inherent frequency at which a structure vibrates when disturbed. This becomes critical for jack-up rigs operating offshore. Why Natural Period Matters for Jack-Ups: - Resonance Risks: When encountering seastates with a peak energy period close to the jack-up's natural period, resonance (dynamic amplification) can occur. This amplifies oscillations, leading to dangerous motions and potentially catastrophic failures. - Optimising Design & Operation: Understanding the natural period helps engineers design jack-ups to minimise resonance risks. It also informs operational decisions, ensuring wave conditions don't put the vessel in danger. Protect Your Jack-Up with Rigorous Analysis: Our Fisis program performs eigenvalue analysis to get the natural periods (Tn) and eigenvectors, while Thalassa simulates the seastate/structure interaction to accurately compute dynamic amplifications of your jack-up. This allows resonance risks to be holistically mitigated, ensuring the safety of personnel and the integrity of the structure. To find out more about Fisis and Thalassa’s capabilities and our interfacing suite of software, drop a comment below or visit https://lnkd.in/etB53wXp. #CWE #JackUp #StructuralAnalysis #VesselDesign #NaturalPeriod #Eigenvalue

How does weather impact offshore rigs? Elevated jack-up rigs face a combined set of wind, waves, and current actions that all exert significant forces on the structure, impacting its stability. The primary culprit is hydrodynamic loading. Imagine colliding water and air particles pushing against the jack-up's exposed parts. This dynamic force is calculated according to industry standards like ISO 19905-1 which directs us to well-established wave theories such as Stokes or Stream. Below sea level, the viscous water particles impart significant momentum on the jack-up. Wave action is a dynamic force that changes as the waves rise and fall. Current is a supplementary force which normally increases the wave action in the direction of flow. Dynamic amplification effects due to wave dynamics are added to the wave and current actions. Both of these are strongest near the sea surface, further exacerbating the overturning moment on the elevated rig. Wind might be much less viscous than water, but its impact on elevated jack-up rigs is significant as it pushes at higher elevations against the exposed legs, hull, and cargo, creating an additional powerful overturning moment. The result is a complex fight for stability of gravity (righting moment) versus environmental actions (overturning moment). The combined effect of these environmental forces creates a complex shear load profile on the jack-up and high overturning moments. Clockwork Engineering's Nephos software helps analyze these environmental loads and footing reactions both statically and in the time domain. Based on this analysis, Nephos performs ISO 19905-1 utilization checks to assess potential risks at specific locations. Curious about how Nephos helps ensure jack-up stability under harsh weather conditions? Leave a comment below or visit us at https://lnkd.in/etB53wXp to learn more. #JackUp #SSA #CWE #Offshore #Environment

The determination of environmental forces is a key aspect of offshore engineering. In addition to attempting to overturn a jack-up, the environment creates internal loads within the vessel which heavily utilise its structural strength. Jack-ups are design to be strong enough to sustain these loads and light enough to minimize gravity loads. Finding the sweet spot is good engineering.

The determination of environmental forces is a key aspect of offshore engineering. In addition to attempting to overturn a jack-up, the environment creates internal loads within the vessel which heavily utilise its structural strength. Jack-ups are design to be strong enough to sustain these loads and light enough to minimize gravity loads. Finding the sweet spot is good engineering.

This week I got to witness a borescope inspection of a cavity wall, to help investigate the cause of damp. The inspection was so simple, yet so effective! The inspection consisted of drilling a few holes within the wall and then poking through the borescope equipment device and watching the footage on the surveyor's phone. - Then sealing up the holes once the inspection was concluded. #borescope #inspection #construction #surveying

By using both screening and inspection technologies, we can better assess an asset's integrity and flow performance. Tracerco’s Explorer™ rapidly screens several kilometers of pipeline at speeds of up to 100 meters per hour, while the Discovery™ subsea pipeline inspection system accurately identifies materials like wax, sand, hydrate, asphaltene, or scale deposition with a density differential as low as 0.05 g/cm3. This enables for quick water ingress detection and precise tracking of pipeline pigs.

By using both screening and inspection technologies, we can better assess an asset's integrity and flow performance. Tracerco’s Explorer™ rapidly screens several kilometers of pipeline at speeds of up to 100 meters per hour, while the Discovery™ subsea pipeline inspection system accurately identifies materials like wax, sand, hydrate, asphaltene, or scale deposition with a density differential as low as 0.05 g/cm3. This enables for quick water ingress detection and precise tracking of pipeline pigs. ✨Find out how we can deliver safe, quick, and reliable insights for #subsea pipelines: https://hubs.ly/Q02nv6N20

Depending on the site specific conditions, the ratio of wave-induced force/moment to wind-induced force/moment can vary from 30% to 80%. This ratio, in turn, affects the dynamic amplification of the jack-up. Often the most onerous loading conditions may seem obvious but are actually not. This is one of many reasons why Clockwork Engineering always analyse each WTG position for multiple combinations of wind/wave and hull loading conditions to ensure assets and people on board remain safe. Thorough, evidence-based analysis is always superior to guesswork.

By using both screening and inspection technologies, we can better assess an asset's integrity and flow performance. Tracerco’s Explorer™ rapidly screens several kilometers of pipeline at speeds of up to 100 meters per hour, while the Discovery™ subsea pipeline inspection system accurately identifies materials like wax, sand, hydrate, asphaltene, or scale deposition with a density differential as low as 0.05 g/cm3. This enables for quick water ingress detection and precise tracking of pipeline pigs. ✨Find out how we can deliver safe, quick, and reliable insights for #subsea pipelines: https://hubs.ly/Q02zC8FP0

By using both screening and inspection technologies, we can better assess an asset's integrity and flow performance. Tracerco’s Explorer™ rapidly screens several kilometers of pipeline at speeds of up to 100 meters per hour, while the Discovery™ subsea pipeline inspection system accurately identifies materials like wax, sand, hydrate, asphaltene, or scale deposition with a density differential as low as 0.05 g/cm3. This enables for quick water ingress detection and precise tracking of pipeline pigs. ✨Find out how we can deliver safe, quick, and reliable insights for #subsea pipelines: https://hubs.ly/Q02zC8FP0