Japanese page
Welcome to the website of Swimming Human Simulation Model "SWUM"!
Last update : 2007/10/2
What is SWUM?
SWUM (SWimming hUman Model) is a Swimming Human Simulation Model,
which has been developed as a powerful analysis tool for
various dynamical problems in human swimming.
In SWUM, the absolute motion of the whole human body is
solved from the equations of motions for the fluid force
and the body inertia,
by giving the relative body motion (joint angles).
SWUM enables you to analyze the various dynamical problems in swimming,
such as the effect of difference of the swimming form
on the swimming speed and the absolute body motion.
By Whom?
SWUM has been developed by the developer team which
is led by
Dr. Motomu Nakashima, Tokyo Institute of Technology, Japan.
Analysis Example
Below movies are analysis examples of SWUM
for the four modern strokes,
which show the motions for one cycle in steady state.
The red lines show the fluid force acting on the each part of the body.
The water surface is checkered.
The total width of the dark and pale blue area corresponds
to the stroke length (swimming distance during one cycle).
The front crawl, breast, back and butterfly strokes are in order below.
(Please use your viewer software's repeat playing function,
since the movie is for only one cycle.)
Crawl (MPEG movie, 0.4MB)
Breaststroke (MPEG movie, 0.4MB)
Backstroke (MPEG movie, 0.4MB)
Butterfly stroke (MPEG movie, 0.4MB)
Free Software "Swumsuit" as SWUM's Implementation
A software "Swumsuit" was developed
as an implementation of the ideal model SWUM.
In addition,
Swumsuit enables everyone to perform simulation
of the human swimming
with easy GUI (Graphical User Interface) operation.
Swumsuit is a Free Software based on GPL (GNU General Public License).
For the detail of Swumsuit,
please see Swimming Human Simulation Software Swumsuit page.
Musculoskeletal Simulation
By Swumsuit version 3.0.0 or higher,
you can output files for the musculoskeletal analysis software
"AnyBody Modeling System".
By using Swumsuit and AnyBody Modeling System,
you can conduct the full-body musculoskeletal simulation for swimming.
Simulation examples for the four strokes are shown as below.
Crawl (AVI movie, 2.8MB)
Breaststroke (AVI movie, 0.5MB)
Backstroke (AVI movie, 0.6MB)
Buttefly stroke (AVI movie, 0.6MB)
References (in English)
-
Motomu Nakashima and Yugo Motegi,
"Development of a Full-Body Musculoskeletal Simulator for Swimming",
Proceedings of the 2007 International Symposium on Computer Simulation in Biomechanics (ISCSB2007), pp.59-60 (2007)
(Download manuscript)
-
Motomu Nakashima, Ken Satou, Yasufumi Miura,
"Development of Swimming Human Simulation Model Considering Rigid Body Dynamics and Unsteady Fluid Force for Whole Body",
Journal of Fluid Science and Technology, Vol.2, No.1, pp.56-67 (2007)
(Download full paper at the journal's website)
-
Motomu Nakashima,
"Mechanical Study of Standard Six Beat Front Crawl Swimming by Using Swimming Human Simulation Model",
Journal of Fluid Science and Technology, Vol.2, No.1, pp.290-301 (2007)
(Download full paper at the journal's website)
-
Motomu Nakashima,
"Analysis of Breast, Back and Butterfly Strokes by the Swimming Human Simulation Model SWUM",
Biomechanisms of Animals in Swimming and Flying -Fluid Dynamics, Biomimetic Robots, and Sports Science- (Eds. Naomi Kato and Shinji Kamimura), Springer-Verlag, (2007) (in press).
-
Motomu Nakashima,
"Development of Computer Simulation Software "Swumsuit" To Analyze Mechanics of Human Swimming",
Proceedings of the 2005 International Symposium on Computer Simulation in Biomechanics (ISCSB2005), pp.65-66 (2005)
(Download abstract at the ISCSB2005 website)
Contact
Please feel free to contact us about SWUM to the mail address:
swum-admin_at_swum.org
(Please change "_at_" into "@").
hits since 2007/6/9