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International Journal of Naval Architecture and Ocean Engineering, 2019 In order to provide a complementary perspective to the effects of the maneuvering motions on the unsteady propeller performance, the numerical simulation of the flow field of the hull-rudder- propeller system is performed by Unsteady Reynolds-averaged ...
Yu-cun Pan, Huai-xin Zhang, Qi-dou Zhou
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The Effect of the Fillets on Submarine Wake Field and Propeller Unsteady Bearing Force
Journal of Marine Science and Engineering, 2023 The uniformity of the wake on the submarine propeller disk is the key factor affecting the vibration and noise performance of the propeller. To study the influence of the fillets on the uniformity of submarine wake field and propeller unsteady bearing ...
Xiang Li +3 more
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Long-span Suspension Bridge Flutter Analysis with Drag Force Effects [PDF]
Journal of Applied and Computational Mechanics, 2021 The paper investigates the influence of the drag force onto the flutter velocity and frequency of the Akashi Kaikyo Bridge. Finite element analyses were run in ANSYS by combining unsteady lift and moment actions with: (a) unsteady drag, (b) steady drag, (
Gianfranco Piana, Alberto Carpinteri
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Zhongguo Jianchuan Yanjiu, 2023 ObjectivesThe unsteady force of the rotor is the main excitation source of pump-jet shafting vibration, and rotor-stator interaction has an important impact on the characteristics of the unsteady force.
Wanghao TANG +3 more
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Study on force spectrum characteristics of a pump-jet under inflow turbulence
Zhongguo Jianchuan Yanjiu, 2022 Objectives This paper aims to clarify the characteristics of the unsteady force spectrum of a pump-jet operating under inflow turbulence. MethodsThe turbulence grid and Fourier synthesis method are employed to produce inflow turbulence with spatial flow ...
Shuaikang SHI +3 more
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Drones, 2023 Considering the vibration generated by a propeller-driven UAV or encountering gust, the propeller will perform a very complex follower motion. A pitch and rotating coupled motion is proposed in the present work that can take more complex unsteady ...
Zhitao Zhang +3 more
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Unsteady aerodynamic forces of a flapping wing [PDF]
Journal of Experimental Biology, 2004 SUMMARYThe unsteady aerodynamic forces of a model fruit fly wing in flapping motion were investigated by numerically solving the Navier–Stokes equations. The flapping motion consisted of translation and rotation [the translation velocity (ut) varied according to the simple harmonic function (SHF), and the rotation was confined to a short period around ...
Jiang Hao, Wu, Mao, Sun
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Applied Sciences, 2022 Unsteady aerodynamic forces are significantly critical to the safety and stability of trains traveling in high winds. This paper describes a study into unsteady crosswind forces of a moving train subjected to a three-dimensional stochastic wind field ...
Zhiyong Yao +3 more
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A new form of equation for force determination based on Navier-Stokes equations [PDF]
EPJ Web of Conferences, 2019 This work is focused on calculating the force effects of an incompressible homogeneous liquid on a surface of a rigid or a flexible tube. An unsteady flow induced by differential pressure at the beginning and at the end of the tube is assumed.
Fialová Simona +2 more
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The Unsteady-State Response of Tires to Slip Angle and Vertical Load Variations
Machines, 2022 The tire is the only part that connects the vehicle and the road surface. Many important properties of vehicles are related to the mechanical properties of tires, such as handling stability, braking safety, vertical vibration characteristics, and so on ...
Yao Ma +5 more
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