G1000402 Basic Study on Seismic Response Behavior and Reduced Order Model of High-Speed-Moving Connected-Vehicle

2015 ◽  
Vol 2015 (0) ◽  
pp. _G1000402--_G1000402-
Author(s):  
Eita SUGIMORI ◽  
Atsuhiko SHINTANI ◽  
Tomhiro ITO ◽  
Chihiro NAKAGAWA
Keyword(s):  
Seismic Response ◽  
High Speed ◽  
Reduced Order Model ◽  
Connected Vehicle ◽  
Response Behavior ◽  
Order Model ◽  
Basic Study ◽  
Reduced Order

G1010401 Basic Study on Model Reduction for Seismic Response Behavior of High-Speed-Moving Vehicle

2014 ◽  
Vol 2014 (0) ◽  
pp. _G1010401--_G1010401-
Author(s):  
Atsuhiko SHINTANI ◽  
Yuto FUJII ◽  
Tomohiro ITO ◽  
Chihiro NAKAGAWA
Keyword(s):  
Model Reduction ◽  
Seismic Response ◽  
High Speed ◽  
Response Behavior ◽  
Basic Study ◽  
Moving Vehicle

A Reduced-Order Model for an Oscillating Hydrofoil Near the Free Surface

2015 ◽  
Author(s):  
Rory C. Kennedy ◽  
Dillon Helfers ◽  
Yin Lu Young
Keyword(s):  
Free Surface ◽  
High Speed ◽  
Equations Of Motion ◽  
Operating Conditions ◽  
Reduced Order Model ◽  
Order Model ◽  
Disturbing Force ◽  
Reduced Order ◽  
Resonance Frequencies ◽  
Force Components

The first objective of this work is to numerically investigate how the proximity to the free surface influences the hydrodynamic response and susceptibility to cavitation of a hydrofoil undergoing controlled pitching oscillations, for high-speed full-scale operating conditions. A second objective is to develop a time-domain Reduced Order Model (ROM) to predict the unsteady hydrodynamic loads (for rapid exploration of the design space and for real-time active/passive actuation/control). The ROM delineates the fluid-structure interaction (FSI) forces into fluid inertial, damping, and disturbing force components, and only predicts the primary oscillation frequency. In addition to predicting the unsteady loads, when coupled with the solid equations of motion, the ROM can also be used to calculate the natural resonance frequencies and damping characteristics with consideration for viscous and free surface effects. This will allow designers to better predict and control the dynamic response of lifting surfaces operating near the free surface.

Sign in / Sign up

Export Citation Format

Share Document