Numerical simulation of dynamic interaction of a droplet with a vortex using a CIP-combined unified procedure method

Multibody Analysis of a Human and Inverted-Pendulum Vehicle With and Without a Handle–Hand Constraint

Volume 7B: 9th International Conference on Multibody Systems, Nonlinear Dynamics, and Control ◽

10.1115/detc2013-12047 ◽

2013 ◽

Author(s):

Chihiro Nakagawa ◽

Shunsuke Arakawa ◽

Atsuhiko Shintani ◽

Tomohiro Ito

Keyword(s):

Numerical Simulation ◽

Multibody Dynamics ◽

Inverted Pendulum ◽

Coupling Model ◽

Dynamic Interaction ◽

Rigid Bodies ◽

Gravity Center ◽

Basic Study

An inverted-pendulum vehicle is controlled by the movement of the user’s gravity center; however, detailed dynamic interaction between the vehicle and a user has not been clarified. In a previous basic study, we investigated the relationships between the user and vehicle in the case that the handle and hand are not constrained [3]. In the present study, we constructed a model that constrains the hand and handle, and simulated the situation of the vehicle accelerating. The coupling model was built using multibody dynamics. The vehicle was expressed by three rigid bodies and a user by eight rigid bodies. In the numerical simulation, it was found that the vehicle accelerates more quickly when there is a constraint linking the handle and hand. This is because the force imparted by the user’s hand, resulting in inclination of the vehicle in the traveling direction, is easily transmitted to the vehicle through the handle.

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Numerical Simulation for Dynamic Interaction of Viscous Flows and Elastic Circular Cylinders

Computational Mechanics ’88 ◽

10.1007/978-3-642-61381-4_417 ◽

1988 ◽

pp. 1575-1578

Author(s):

Norio Kondo ◽

Nobuyoshi Tosaka ◽

Toshio Nishimura

Keyword(s):

Numerical Simulation ◽

Viscous Flows ◽

Dynamic Interaction ◽

Circular Cylinders

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Modelling Randomness in the Simulation of Ice-Induced Vibrations

Volume 8: Polar and Arctic Sciences and Technology; Petroleum Technology ◽

10.1115/omae2018-77808 ◽

2018 ◽

Author(s):

Yingying Chen ◽

Bowei Yu ◽

Ying Min Low ◽

Kim Thow Yap

Keyword(s):

Numerical Simulation ◽

Sea Ice ◽

Actual World ◽

Measurement Data ◽

Dynamic Environment ◽

Dynamic Interaction ◽

Thickness Variation ◽

Freeze Thaw ◽

Crushing Force ◽

Ice Failure

Sea ice forms in a dynamic environment that affects its morphology. This results in the inhomogeneity of ice reflected for example in its thickness variation, flaws in terms of brine channels or cracks, presence of snow cover, and its various deformed states undergoing freeze-thaw cycles. This sea ice inhomogeneity introduces important effects observable in the response of a structure when it is interacting with sea ice. Failure to account for the randomness introduced by the sea ice inhomogeneity would risk producing unrealistic simulations not seen in the actual world. In this paper the proposed approach to model randomness in numerical simulation of ice-induced vibrations is presented. This is achieved by accounting for randomness in the ice crushing force. The study is carried out using a purpose-developed numerical model that simulates the ice-induced vibrations of structures. The model adopts a phenomenological basis that aims to capture the important processes during the dynamic interaction between ice and the structure. Full-scale measurement data is used for comparison in this study.

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Selection of Artificial Boundary Condition on Soil-Structure Dynamic Interaction

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.450.498 ◽

2010 ◽

Vol 450 ◽

pp. 498-501 ◽

Cited By ~ 1

Author(s):

Hai Feng Sun ◽

Li Ping Jing ◽

Xian Chun Meng

Keyword(s):

Numerical Simulation ◽

Soil Structure ◽

Dynamic Interaction ◽

Artificial Boundary ◽

Structural Dynamic ◽

Fixed Boundary ◽

Calculation Region ◽

Structure Dynamic ◽

Viscous Boundary ◽

Selection Of

Numerical simulation is an important method to study the structural vibration response. And artificial boundary conditions will directly affect the reliability of numerical simulation results. While when we conduct numerical simulation of vibration, it is often assumed the input surface to be a fixed boundary. The purpose of this paper is to make a study on rationality of this method by the use of simulation on a two-dimensional homogeneous elastic half-space model and a soil-structure dynamic interaction model. The results show that: when fixed boundary used, after the wave reflected to the fixed boundary, it couldn’t leave the calculation region and will reflects back into the calculation region again; when viscous boundary used, the energy will be absorbed by the bottom boundary when the wave achieved the viscous boundary. It simulates the real situation that the wave goes through boundary surface into the infinite medium. So, when carrying out numerical simulation on structural dynamic analysis, the selection of fixed boundary is inclined to an incorrect result, while the select of viscous boundary is more accurate and reasonable.

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