NEWS
Motovated Design & Analysis Newsletter - April 2010
Hi everyone,
We hope you got through the busyness of the end of the financial year, and had a well-deserved break over Easter weekend.
We have some great rail projects on the go, and this issue will focus on some new technologies in locomotive repowering.
This includes the technology associated with containerised switcher unit solutions that we are helping to develop.
We also have another
joke and puzzle to solve, and a helpful tip on getting accurate results in FEA by using inplane effects and large displacement formulations
when necessary.
Enjoy the read!
Greg Morehouse
Managing Director
Engineering Analyst
greg@motovated.co.nz
Locomotive Repowering - Global Locomotive
Motovated gets to design the coolest things. Usually we can't talk about it while the development is going on, but one that we can
talk about is the new locomotive repower technology being developed by Global Locomotive.
While going to a US EPA Tier 3 re-power alone was and still is a good solution, Mike (a Kiwi) and Lance (an Aussie) came up with a better idea...
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| Read more here!
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Tips & Tricks - Inplane effects and limitations of free FEA software
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Compressive and tensile loads have a dramatic effect on the capacity of a structure or part to resist lateral bending loads. Compressive
loads
reduce resistance to bending (stress softening), and tensile loads increase resistance to bending (stress stiffening) and are
especially important in the design of pressure vessels, frames and structural members.
To account for these effects in Finite Element Analysis, inplane effects, large displacement or a full non-linear analysis need to be
used. This forces the software to recalculate the stiffness of the model and include the effect of the applied loads.
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| Compare the results of a simple example with and without inplane effects here
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JOKE: Wisdom from above
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A man is flying in a hot air balloon and realizes he is lost. He reduces height and spots a man down below. He lowers the balloon
further and shouts, "Excuse me, can you tell me where I am?" The man below says, "Yes, you're in a hot air balloon, hovering 30 feet above
this field."
"You must be an engineer," says the balloonist. "I am," replies the man. "How did you know?"
"Well," says the balloonist, "everything you have told me is technically correct, but it's of no use to anyone."
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The man below says, "You must be in management." "I am," replies the balloonist, "but how did you know?"
"Well," says the man, "you don't know where you are, or where you're going, but you expect me to be able to help.
You're in the same position you were before we met, but now it's my fault."
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Outsmart your colleagues...
This issue we have a manufacturing puzzle for you. The two parts shown opposite are made of metal, and they can be taken apart
by hand. All four sides are identical.
How are these parts made?
Send your correct answer to
competition@motovated.co.nz to be
in with a chance of winning a $50 Mitre 10 voucher.
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Answers to last issue's puzzle
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Check your answer to February issue's question here:
First, the waiter stuck the match into the lemon wedge, so that it would stand up straight. Then he lit the match, and put it in
the middle of the plate with the lemon. Then, he placed the glass upside-down over the match. As the flame used up the oxygen in the glass,
it created a small vacuum, which sucked in the water through the space between the glass and the plate. Thus, the waiter got the water
into the glass without touching or moving the plate.
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Last issue's puzzle winner...
Congratulations to Stuart Jacques from O2 Health, a $50 Mitre 10 voucher is on its way to you.
Thanks for your time and support. We look forward to working with you and continuing to provide the best engineering services possible.
Greg and the team at Motovated.
"engineering your vision"
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