Results 11 to 20 of about 1,373 (217)

Numerical Assessment of Roll Motion Characteristics and Damping Coefficient of a Ship [PDF]

Journal of Marine Science and Engineering, 2018
Accurate calculation of the roll damping moment at resonance condition is essential for roll motion prediction. Because at the resonance condition, the moment of inertia counteracts restoring moment and only the damping moment resists increase in the ...
S.S. Kianejad, Jaesuk Lee, Yi Liu, Hossein Enshaei   +3 more
doaj   +4 more sources

Identification of roll damping coefficient using the free rotation method [PDF]

INCAS Bulletin
The free rotation method represents the simplest method for roll damping coefficient identification in experimental aerodynamics. To apply this method, it is necessary to spin the model to a desired angular velocity and then release the model to spin ...
Ionut BUNESCU, Mihai-Victor PRICOP, Mihaita-Gilbert STOICAN, Mihai-Vladut HOTHAZIE   +3 more
doaj   +2 more sources

Research on horizontal nonlinear sub-harmonic vibration characteristics and stability control of rolling mill roll system [PDF]

Scientific Reports
In this paper, the main content is analyzing the combined resonance characteristics of the roller system. Firstly, established a horizontal nonlinear vibration model with fractional-order by considering the nonlinear stiffness and nonlinear damping ...
Li Jiang, Ting Yang, Wei Shi, Jiaquan Xie   +3 more
doaj   +2 more sources

Investigating the Effective Numerical Solution Parameters in Calculating the Roll Damping Coefficient [PDF]

فصلنامه علوم و فناوری فضایی, 2017
Determining aerodynamic coefficients and control and stability derivatives play animportant role in the development of flight vehicles. In this paper, roll damping coefficientof BASIC FINNER standard model is determined at different attack angles and ...
Mohammad Moumivand, hasan mohammadkhani, javad heydari, mohammad hosein vaezi   +3 more
doaj   +4 more sources

Numerical Study on the Effect of Weight Variables on the Roll Damping Coefficients for a Fishing Vessel

Polish Maritime Research
The roll damping coefficient is essential when considering the viscous effect in the potential-based hydrodynamic analysis of fishing vessels; it is an important factor in the roll motion response.
Seo Janghoon, Park Dong-Woo
doaj   +2 more sources

Parameter identification for nonlinear damping coefficient from large-amplitude ship roll motion using wavelets

Beni-Suef University Journal of Basic and Applied Sciences, 2017
In this paper, we have introduced an efficient Legendre wavelet spectral method (LWSM) to ship roll motion model for investigating the nonlinear damping coefficients.
D. Sathyaseelan, G. Hariharan, K. Kannan
doaj   +2 more sources

Coherent solutions to roll damping derivatives evaluation for a generic rocket model [PDF]

INCAS Bulletin, 2023
This paper presents a coherent approach to evaluate the roll damping derivatives for the standard Basic Finner Model. The study compares and analyses the results obtained through a range of techniques, including experimental testing, numerical ...
Ionut BUNESCU, Stefan BOGOS, Teodor-Viorel CHELARU, Mihai-Vladut HOTHAZIE, Mihai-Victor PRICOP   +4 more
doaj   +1 more source

Determination of ship roll damping coefficients by a differential evolution algorithm [PDF]

Journal of Physics: Conference Series, 2021
Abstract The execution of the so-called extinction tests represents the classical experimental method used to estimate the damping of an oscillatory system. For the specific case of ship roll motion, the roll decay tests are carried out at model-scale in a hydrodynamic basin.
Mauro F., Nabergoj R.
openaire   +4 more sources

Hydrodynamics Factors Correspond to the Weather Criterion Applied to an Indonesian Ro-Ro Ferry with Different Weight Distributions

International Journal of Technology, 2021
The effect of weight distribution on hydrodynamics factors in the weather criterion was investigated. Two types of weight distribution were examined.
Daeng Paroka, Andi Haris Muhammad, Sabaruddin Rahman   +2 more
doaj   +1 more source

The Effect of Water on Deck on the Roll Bifurcation of Crafts under Random Waves [PDF]

مجله مدل سازی در مهندسی, 2021
The stability of the roll motion of crafts is of great importance because of its significant impact on safety, ease of travel, overall performance and potential capsizing of the system.
asnafi asnafi
doaj   +1 more source