The latest edition of the Marine Engineers Review (MER) is here! Dive into groundbreaking updates and expert perspectives shaping the maritime industry. 📖 The Cover: MER(I) November 2024 Volume: 18; Issue: 12 🖋️ Editorial Highlight: "There is no unhappiness like the misery of sighting land again after a cheerful, careless voyage." – Mark Twain ✨ Highlights from this Edition: 🛠️ Ship stability/heeling during sharp maneuvers. 🌌 Technological advancements in deep-ocean human diving systems. 🌡️ Hybrid composites with graphene and boron carbide for marine applications. 🛠️ Optimizing process control with P, PI & PID controllers. ⚓ The historical allure of Larin currency in maritime trade. Explore cutting-edge technical articles and advancements in Marine Engineers Review (India) - MER(I). Stay ahead in the ever-evolving marine and shipping industry with this November 2024 edition. 📬 For subscription inquiries, contact: subeditor@imare.in #MarineEngineering #MERIndia #MaritimeInnovation #MarineTechnology #ShipStability #DeepOceanExploration #HybridComposites #MaritimeTradeHistory #MarineInsights #EngineeringExcellence #ShippingIndustry #MaritimeProfessionals #TechnicalAdvancements #MarineEngineersReview #IMARE Cdr Dr. Bhaskar Bhandarkar Bhupesh Tater CEng, FIMarE, MICA Suresh Shenoi Chirag Bahri
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Designing and manufacturing a Solid-Fuel Rocket Motor has been a long-held aspiration of mine, one that I was determined to see through. After nearly a year of rigorous effort, study, and research, the Rocket-Motor is now ready and awaiting its static fire test. As the first project of its kind at JIET, we encountered numerous challenges, particularly in sourcing materials and ensuring efficient and safe manufacturing processes. Despite these hurdles, our collective determination and passion for aerospace engineering propelled us forward. I would also like to extend special thanks to PARI GEHLOT for her unwavering support. Her expertise and dedication were pivotal in turning what seemed like an impossible task into a reality. Pari’s contributions were essential in maintaining the highest standards of efficiency and safety throughout the manufacturing process. I owe a deep debt of gratitude to Devansh Sharma, whose problem-solving skills were invaluable throughout this journey. His assistance was crucial in navigating various obstacles, ensuring the project remained on track. Even though he had nothing to gain from it, still he came to help us complete this project. My heartfelt appreciation also goes to our professors ABHISHEK DIXIT sir, VIKAS DAVE sir & Mohit Ostwal sir who provided their expert guidance, which was instrumental in refining our approach and adhering to both academic and industry standards. Additionally, the support from JIET Group of Institutions management was indispensable, offering the necessary resources and encouragement to see this project through to completion. I cannot thank Rahul Singhi sir, Avnish Bora sir & Dr.Manish Bafna sir enough for the freedom that was given to me, turning this thought, this dream of mine into a reality. This collaborative effort not only allowed us to overcome significant challenges but also set a new benchmark for future aerospace engineering projects at our institution. The successful completion of this solid rocket motor stands as a testament to teamwork, perseverance, and the relentless pursuit of innovation. It exemplifies the remarkable achievements possible when a dedicated team unites to transform a challenging vision into reality. #RocketScience #AerospaceEngineering #SolidRocketMotor #Innovation #EngineeringExcellence #Teamwork #ResearchAndDevelopment #JIETInnovation #PioneeringProject #EngineeringAchievement #SpaceTechnology #StudentEngineers #FutureOfAerospace #EngineeringPassion #RocketDesign #STEMProjects #TechnicalExcellence #ProjectMilestone #EngineeringDreams
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Excited to share our latest research published in Applied Composite Materials! Our article, "Design Optimization for Hydrostatic Pressure in Hybrid Composite Cylinders," explores how to achieve the highest collapse pressure in glass-carbon hybrid composite cylinders under hydrostatic loading. The study evaluates analytical solutions with experimental validation and provides key insights into optimizing layup configurations for superior buckling performance in underwater applications. A huge thanks to Akongnwi Nfor Ngwa, PhD, our incredible advisors Dr. Helio Matos and Dr. Arun Shukla, and the Office of Naval Research for their guidance and support in making this work possible. Feel free to check out the article to learn more about our findings! https://lnkd.in/eUPNq8V5
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https://lnkd.in/e9xi36cp The use of OMA is similar to FEM analysis, but input is not hypothised by the analyst , the displacements, but is measured by the vibration cells. FEM has library of non linear constitutive models for the materials, but the maintenance is devoted to "rate dependent" analysis, than classic "rate independent" models (Mohr Coulomb, Von Mises, etc) are useless this depend on inorganic chemical reaction of construcution materials (corrosion, carabonation, etc) Earthquake Engineering Roma Palle Andersen Simon Shaw
Strutural Vibration Solutions | Vibration analysis
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I wanted to provide more information based on the questions related to the level of reductions in the #vibration/noise received from experts: The results showed a 40-60% reduction in #vibration/noise on with the ships installed air-lubrication system, depending on the ship's speed. So, this can be an interesting solution for ships suffering from both noise/vibrations and high fuel consumption, applicable to both #retrofit and #newbuild. Contact us for more information if you need further discussion! Kumera Marine #Shipping #MarineTechnology #SustainableShipping #ALS #AirLubricationSystems #EnergyEfficiency #GreenFuture #ZeroEmission #IMO #CO2 #Ship #NavalArchitecture
Senior Propulsion Engineer-Hydrodynamics Specialist at Kumera Marine (Helseth) | PhD in Marine Hydrodynamics
🌊 Exciting to Share! 🚢 The installation of #air_lubrication_system in ships is increasing each year, currently achieving 5-6% fuel saving alongside significant reductions in ship vibrations. These systems have the potential to improve energy efficiency by up to 15%. I'm thrilled to attend the WALTZ II Workshop to discuss this with experts, as I am sure this group will play a major role in the future of air lubrication systems for ships worldwide. At Kumera Marine, we're collaborating with that team to further evaluate the interaction between air lubrication systems and propulsion systems, aiming to design the most efficient propellers for this technology. The workshop was attended by researchers and engineers from different companies and research institutes worldwide, including SINTEF Ocean, Department of Marine Technology (IMT) - NTNU, Kumera Marine, University of California, Berkeley, TU Delft | Mechanical Engineering, MARIN (Maritime Research Institute Netherlands), Silverstream Technologies, Kongsberg Maritime, Foreship Ltd. @alfalaval, Damen, University of Southampton, TMC and DNV Thank you all, and here's to a greener future! 🌍💚 #MarineTechnology #SustainableShipping #AirLubricationSystems #EnergyEfficiency #GreenFuture #WALTZIIWorkshop #KumeraMarine #IMO #Ship #NavalArchitecture
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🌟Join us for an engaging session on "Post Buckling of Composite Shells" led by Dr. Ramesh Kumar, Former Head of Honeycomb Product Development Division at Vikram Sarabhai Space Centre, ISRO, Thiruvananthapuram. Explore the complexities and applications of post-buckling behavior in composite shells, offering valuable insights into aerospace and structural engineering. 🚀 📅 Date: 11.03.2024 🕒 Time: 09:00 am - 12:30 pm 📍 Venue: K206 - Civil Dept. Seminar Hall Don't miss this opportunity to expand your understanding of advanced structural mechanics and aerospace technology! 🛰 Composite structures are designed for aerospace applications as it is very light. Due to this reason, shell thickness is in the range of 0.2 to 2mm only. A small deviation in ovality while assembly leads to a very large deviation in the estimated buckling stress from the true circularity assumed in the theoretical model by as much as 50%. Hence post buckling study is being followed to accurately assess the design margin.
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𝗦𝗺𝗮𝗿𝘁𝗲𝗿 𝘁𝗵𝗮𝗻 𝘆𝗼𝘂𝗿 𝗮𝘃𝗲𝗿𝗮𝗴𝗲 𝘄𝗲𝗹𝗱: 𝗛𝗘𝗥𝗔 𝗿𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝘁𝗮𝗸𝗶𝗻𝗴 𝗼𝗻 𝘀𝗵𝗮𝗸𝘆 𝗴𝗿𝗼𝘂𝗻𝗱 🔧 Did you know even the tiniest misalignments in welded joints could spell trouble for buildings—especially in earthquake-prone Aotearoa? 🏗️💥 This is the rangahau (research) that our kairangahau (researchers) have been busy working on to shed new light on the critical role fabrication tolerances play in ensuring structural integrity! 🧠 Check out this latest article from our Lead Research Engineer | Seismic Systems Hafez Taheri as he shares recent findings from works done in collaboration with The University of Waikato PhD student Bikram Paul who has been diving into the nitty-gritty of welded joints and finding new ways to keep them rock-solid when things start shaking. 🌏⚡ With analysis of over 100 models, the findings have led to the development of a predictive equation set to helps engineers design safer, more resilient welded joints compliant with AS/NZS 5131 - with next steps being to extensively test the reliability of the model before it is more widely shared. Talk about smart, huh? This research represents a step forward in addressing the challenges faced by engineers when working with welded joints. 🔗 Check out the full kōrero here: https://lnkd.in/g85imDEk - #Engineering #SeismicSmarts #Construction40 #WeldWizards #KeepingNZSafe #Innovation
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Precision Engineering at its Finest!
In Photos: Stonehenge’s Ancient Solstice Sunrise Alignment Wows 15,000
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Flip is not a small ship, it is about 108 meters long and weighs 700 tons Engineers designed it to be able to move to a vertical position with 90 degrees straight, so that the front of the ship at the top is 17 meters high (i.e. a 5-story building high) while at the bottom is submerged 91 meters long, i.e. that most of the ship is submerged underwater. Which helps the ship's stability and resistance to waves, the transformation process takes about 30 minutes, in which the seawater is pumped into huge tanks in the back of the ship, which makes it sink into the water to become the ship in a vertical position, and this ship is considered one of the most important ships in the field of scientific research of seas and oceans.. 💁
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The research vessel RV Flip is the only vessel in the world capable of shifting from horizontal to vertical position in the middle of the ocean. Flip is not a small ship, it is about 108 meters long and weighs 700 tons Engineers designed it to be able to move to a vertical position with 90 degrees straight, so that the front of the ship at the top is 17 meters high (i.e. a 5-storey building high) while at the bottom is submerged 91 meters long, i.e. that most of the ship is submerged underwater. Which helps the ship's stability and resistance to waves, the transformation process takes about 30 minutes, in which the seawater is pumped into huge tanks in the back of the ship, which makes it sink into the water to become the ship in a vertical position, and this ship is considered one of the most important ships in the field of scientific research of seas and oceans.. How beautiful is Engineering!!!
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💡 #Highcitedpaper #University of Zagreb / Sveučilište u Zagrebu 🌊 Title: CFD Study on the Influence of Exostructure Elements on the Resistance of a Submarine 🔑 Keywords: #submarine; #CFD; #hydrodynamic resistance; exostructure 🔗 Check here: https://lnkd.in/gqHwnScc 📜 Abstract:Submersible vessels designed to operate at low speeds are often designed with an intricate exostructure, as well as other elements that are located outside of the main pressure hull. Exostructure elements are often of cylindrical or rectangular shape, positioned perpendicularly to the flow direction. For this reason, their resistance coefficient is relatively large compared to the pressure hull or appendages of a classical submarine. In some cases, the exostructure can significantly increase the wetted surface of the vessel and dominate its resistance. This paper presents a study on how different exostructure elements impact the overall resistance of a submarine relative to the resistance of the cylindrical, smooth, pressure hull. Additionally, the effect of depth is also considered. The study is conducted using the RANS-based CFD method. The subject of the study is a 25 m long tourist submarine designed for depths up to 40 m and a speed of up to 3 knots.
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