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Limei Ma, Yongheng Zhang, Yuli Niu, Yong Zhao, Shaoya Guan, Zijing Wang and Tuoda Wu
Ball-shell rotors with non-standard shapes, non-uniform conductive coatings, and eccentric masses machined by conventional processes constrain the improvement of levitation and torque accuracy of magnetically levitated momentum balls. This paper focuses ...
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Dongfeng Yan, Zehang Zhao, Anchen Song, Fengming Li, Lu Ye, Ganchao Zhao and Shan Ma
The fluidic pintle nozzle, a new method to control the thrust of a solid rocket motor, has been proposed in recent years by combining the pintle with the aerodynamic throat (fluidic throat). The study of static characteristics has proved that it has a re...
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Alessandro A. Quarta and Giovanni Mengali
The aim of this paper is to investigate the performance of a robotic spacecraft, whose primary propulsion system is an electric solar wind sail (E-sail), in a mission to a heliostationary point (HP)?that is, a static equilibrium point in a heliocentric a...
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Hauke Witte, Christoph Bode and Jens Friedrichs
Typically installed in a rotor-only configuration, low-pressure axial fans discharge directly into a free atmosphere and the discharge shows a strong swirl component. Since such designs, without guide vanes, cannot convert the dynamic pressure in the swi...
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Keyvan Salehi Paniagua, Pablo García-Fogeda and Félix Arévalo
In this work, the aeroelastic stability of an aerial refueling system is investigated. The system is formed by a classical hose and drogue, and the novelty of our work is the inclusion of a grid fin configuration to improve its stability. The unsteady ae...
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Vladimir S. Aslanov and Daria V. Neryadovskaya
This paper is dedicated to identifying stable equilibrium positions of the tether systems attached to the L1 or L2 libration points of the Mars?Phobos system. The orbiting spacecraft deploying the tether is at the L1 or L2 libration point and is held at ...
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Giovanna Concu, Mariangela Deligia and Mauro Sassu
Several Italian cities are characterized by the presence of centuries-old historic walls, which have a cultural heritage value and, due to their structural role as a retaining wall, often influence the safety of adjacent buildings and infrastructure. Anc...
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Han Li, Jun Li, Yu Xin, Hong Hao, Tan D. Le and Thong M. Pham
This paper proposes using neutral axis locations to monitor and quantify the prestress force in post-tensioned precast segmental beams. Strain measurements are used to obtain the neutral axis locations of specific cross-sections of the precast prestresse...
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Yanjie Zhao, Guanci Chen, Wenbin Zhang and Yinke Ding
The traditional slewing bearing with circular raceway has the problem of stress concentration under the large overturning moment. In this paper, a new non-circular raceway of a slewing ball bearing was presented to conquer this problem. To obtain the new...
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Issam Ouahmane, Rachid El Alaiji, Mohammed Sallaou and Larbi Lasri
The design guidelines available in building codes for steel and fibre reinforced polymer (FRP) reinforced concrete (RC) beams have been developed on the basis of empirical models. While these models are successfully used for practical purposes, they requ...
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