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University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
To be held on Friday October 15, at Visions Lab(ECAE 1B73) - No recitations that day.Use Buff One card to get in 24/7 (but need account).
Attendance recommended but not required
Demo is a hands-on, self-learning (individual) tutorial.Once in, sit at any empty computer and try logging in. ANSYS tutorial available on public web site: Homepage scrolldown-> Lab Informationin both PDF and DOC formats
ANSYS Demos for Computer Portion of Lab 2
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
Because of limited seating (physically 25 workstationsbut only 23 are operational) the demo will be divided into four roughly-one-hour subsections
Sec 011: 10 and 11PM Sec 012: 1 and 2PM
Student distribution on next slide
Demo Times
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
Section 013 (10-11:50AM) Splitting
A-N 10 AMO-Z 11 AM
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
Section 012 (1-2:50 M) Splitting
A-L 1 PMM-Z 2 PM
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
Note: members of a group need notattend the same demo subsection, since the tutorial is individual
No Grouping Necessary
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
A Short Pictorial Introduction to FEM
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
such as beams, ribs and spars,were sufficient for modelinglow aspect ratio aircraft structures
(e.g. Lockheed Constellation,pictured on left)
Before 1950, standard structural elements
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
... starting about 1952 as a modeling tool to simulate delta wing military aircraft on digital computers
Digital computers began to be commercially sold by 1951. Only aerospace companies and some government agencies could afford them (a vacuum-tube monster weighting several tons cost theequivalent of $100M today)
The modern FEM was developed ...
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
Most of the pre-1960 work was done at a few places
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
A key 1956 paper described the DSM as used today
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
... but it had a marketing problem:
no brand name
The method was well on its way by 1960
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
Name was coined by Ray Clough in 1960
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
b. 1921, Washington state
served in Air Force during WWII
Ph.D. Aero & Astro MIT, 1950
joined Civil Engrg faculty at UC Berkeley, 1951
avid mountaineer & skier (holds many climbing records)
Ray Clough’s early career I
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
spent 1952-54 summers at Boeing at Jon Turner’s group so he could go mountain climbing on weekends
modern FEM started by 1956 JAS paper by Turner, Clough, Martin & Topp
back at Berkeley, became interesting in Civil applications, especially earthquake engineering
formed active FEM research group in 1958
Ray Clough’s early career II
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
First Civil structure analyzed by FEM (1962)
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
20021956
Ray with Kurt Gerstle (his 1st student) on left pic
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
gave up FEM research in 1972 for seismic engineering
head of NSF Earthquake Engineering Center at Richmond, CA, 1974-82
retired from Berkeley 1987
honored with National Medal of Science, 1994
Ray Clough’s late career
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
An Unimpeachable Gentleman
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
By 1970, FEM (DSM) had taken over computational mechanics and was expanding beyond structures
Some samples follow
Explosive Success ...
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
F-16 Structural Model
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
95% ofelements areHPSHEL318 DOF shells
F-16 Exterior Surface Zoom
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
Some solid elements (bricks & tets) used for “wing fingers”
F-16 Interior Structure Zoom
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
Liquid Natural Gas (LNG) Ship - Global FEM Model
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
Stepwise Construction of Global Model
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
“Hot Spots “ Detailed Local Models
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
QuickTime™ and aYUV420 codec decompressor
are needed to see this picture.
QuickTime™ and aYUV420 codec decompressor
are needed to see this picture.
Wave Motion and Hull Pressures
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
470 m high including superstructure
240 000 m3 of concrete
104 000 tons of steel reinforcement
Design life of 50 years
Largest man-made object ever moved
Supplies 10 percent of Europe’s gas consumption
The Troll Platform
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
Floating TLP Platform
Made of reinforced concrete
16 vertical anchoring lines (tethers)
30 000 of pre-tensioning
Transverse stiffness supplied by secondary geometric effects
The Heidrun Platform
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
Last But Not Least ...
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
16-bay Truss for Lab #2: FEM Model
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
Idealization Process
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
FEM-DSM Breakdown
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
FEM-DSM Assembly & Solution
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
The Example TrussThe Example Truss
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
The Truss ExampleThe Truss Example
University of Colorado - Intro to Aerospace Structures (ASEN 3112) - Fall 2012
