Marine Articles

Stay updated on the latest blog posts from DMS.  Everything from videos to technical articles, the latest software, and so much more.    

Smooth Sailing: Pros and Cons of a SWATH Vessel

Welcome to luxury cruising.  Glide above the waves without any jerky motions.  Walk about your accommodation deck, unhampered by nasty rolling motions.  If this temps you, come realize the dream of the SWATH vessel.  But it comes at a price.  Discover if this unique...

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Why You Want a Trimaran: Pros and Cons of a Trimaran

Three hulls are better than one!  That would be the adage of the trimaran.  It consists of one central hull with two smaller side hulls, called amas.  The average person conceives of the trimaran as something even more extreme than catamarans.  Lighter weight, higher...

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Six Keys to Better Marine FEA

Tips to Improve Your FEA Model No matter how much work you do in finite element analysis (FEA), there is always room for improvement.  Masters of FEA trade-craft hoard many little tricks and nuggets of wisdom to deliver better FEA.  These tricks yield better ways to...

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Trust Your Singularity

Why FEA Singularities Are Acceptable https://youtu.be/-OHXl-mvR5U 1.0 Introduction You stare in dread at the FEA results, which show unbelievable stresses in small spots at the corners.  Don’t panic; they are only stress singularities.  Small regions where the FEA...

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Mesh Size Does Matter

FEA Errors from Mesh Size https://youtu.be/EDs7uqDRHDE   1.0 Introduction When was the last time you actually tested your finite element analysis (FEA) results?  Are you sure that every FEA analysis ever ordered is accurate?  Will you trust your life to it?  In...

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Reviewing FEA Analysis

Get The Most From Your FEA Report 1.0 Introduction The engineer delivered a shiny new FEA report, but what does it mean to you?  What details to look for?  Are the results good or bad?  An FEA report contains much more value when all those colorful graphs reveal their...

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Miami Bridge Collapse and Professional Engineers

https://www.youtube.com/watch?v=Ucflj-MsJBI   Many heard about the disaster of the Miami bridge collapse last week.  Naturally, the dust didn't even settle before questions, speculation, and lawsuits started to fly.  We all wanted to know why.  How do we prevent...

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Six Hours of AWESOME SUPERSHIPS!

I confess.  I get excited about ships.  They show amazing complexity and materialize to answer so many unique industrial needs.  Imagine my joy when I came across this little gem on Amazon.com:  Superships...

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How to Run FEA

An Overview of FEA Work Procedure https://youtu.be/PxbPcrux2fw   1.0 Introduction Finite Element Analysis (FEA). How does it happen? What is the general process for how to produce a quality FEA analysis, from start to finish? As a client, what do you get when you...

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Five Minute FEA

How to Contract an FEA Service Provider https://youtu.be/xKvH36wX9Fk   1.0 Introduction Finite Element Analysis (FEA).  You want it.  But where to start?  How does FEA work?  How to pick the right provider.  FEA requires more than just software.  It needs a...

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Friends of the Propeller

Overview of Propulsion Improving Devices Why settle for the limits of a standard open water propeller?  Instead, consider the many potential modifications of various propulsion improving devices, which claim to improve propeller efficiency.  What are their...

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How to Make a Boat Propeller

I love to learn how industrial equipment gets created.  Boat propellers are especially interesting.  Unlike ship propellers, these smaller propellers go on leisure craft and other small vessels.  The emphasis is on mass production.  That mass production requires an...

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Propellers By the Numbers: Propeller Dimensions

How Propeller Dimensions Affect You Quick!  Name all the different propeller dimension terms you need to specify the exact shape and size of a propeller: Propeller diameter Number of blades Pitch Blade area Blade skew Blade rake Propeller section series Rotation speed...

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