SAE Update - April 2024 - 12

TECH FOCUS:
MATEriAlS
Three billion years of r&D
excessive noise-in two different
ways. The train was called the
" bullet train " because, when first
deployed, the front was shaped
like a bullet for optimizing
aerodynamics. But in use, the
front of the train pushed
pressure waves through the
tunnel and, upon exiting, created
a sonic boom-like explosion.
An engineer on the project for
redesign noticed that, not unlike
what the train was experiencing,
a kingfisher moves from a lowresistance
medium (air) to a
higher-density medium (water)
with no splash-an important
adaptation for catching prey-
due to the shape of its beak. After
the team ran tests on various
shapes, they discovered that the
configuration of the kingfisher's
beak was the most optimal for
reducing the pressure wave
problem. The train got a nose job!
The unique, crack-resistant herringbone structure of a mantis shrimp's
impact region is exceptionally strong, inspiring the design of new composite
materials.
The second bird for inspiration was the owl, who
hunts in silence due to serrations on the edges of its
feathers. The serrations break up larger vortexes that
cause noise by creating smaller vortexes in the air
flow. Mimicking this shape and applying it to the
pantographs on the train, noise was reduced even
further keeping operational noise below the very strict
standard set by Japanese law. And a bonus:
Dragonfly wings are lightweight, flexible, and strong-
ideal attributes for modern aerospace design.
12
April 2024
UPDATE
The Technology Partnership
UC Riverside

SAE Update - April 2024

Table of Contents for the Digital Edition of SAE Update - April 2024

SAE Update - April 2024 - Cov1
SAE Update - April 2024 - Cov2
SAE Update - April 2024 - 1
SAE Update - April 2024 - 2
SAE Update - April 2024 - 3
SAE Update - April 2024 - 4
SAE Update - April 2024 - 5
SAE Update - April 2024 - 6
SAE Update - April 2024 - 7
SAE Update - April 2024 - 8
SAE Update - April 2024 - 9
SAE Update - April 2024 - 10
SAE Update - April 2024 - 11
SAE Update - April 2024 - 12
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