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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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Yongchang Huang, Xiangying Guo and Dongxing Cao
Z-shaped folding wings have the potential to enhance the flight performance of an aircraft, contingent upon its mission requirements. However, the current scope of research on unmanned aerial vehicles (UAVs) with Z-shaped folding wings primarily focuses ...
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Yanming Mu, Xiangying Hou and Xueming He
Gear vibration becomes unmanageable under extreme conditions, which shortens the time between overhauls of the helicopter reducer and affects the service efficiency of helicopters. For this purpose, an active precontrol strategy for shape and performance...
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Yanan Wang, Keyuan Li, Baijie Qiao, Zhixian Shen and Xuefeng Chen
The internal gear is part of the planetary and epicyclic gear pairs in the transmission system of the helicopter. Gear tooth wear is one of the most usual gear failures. This paper establishes an analytical model to evaluate the influence of tooth wear o...
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Jia Yuan, Zhen Liu, Hua Geng, Songtao Zhang, Lihua Liang and Peng Zhao
In order to reduce the offshore wind power operation and maintenance vessel motion induced by severe sea states, a suitable stabilizer with the ship based on linear quadratic regulator strategy is proposed in this paper. First of all, the dynamics of the...
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Rui Xu, Jing Zhang, Jiugen Wang, Zihui Wang, Lin Xi, Renjun Li and Hao Li
The determination of meshing force and the load sharing ratio of gear teeth is critical to predict the dynamic behavior or the load capacity of gear transmissions. In the previous literature, the dynamic meshing force is usually calculated based on the t...
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Haiwei Wang, Cheng Ji, Fengxia Lu, Cheng Wang and Xueyan Sun
The dynamics analysis of a planetary gear set transmissions requires the creation of completely different models for different gears, which is very tedious. In this paper, a generalized dynamics modeling process is proposed for a three planetary gear set...
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Lan-tao Yang, Yi-min Shao, Wei-wei Jiang, Lu-ke Zhang, Li-ming Wang and Jin Xu
Tooth surface cracks are considered as the early stage of the development of tooth surface spalling failure. Understanding the excitation mechanism of surface cracks has a great significance in the early diagnosis of spalling faults. However, there are f...
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Chawki Abdessemed, Abdessalem Bouferrouk and Yufeng Yao
This work explores the aerodynamic and aeroacoustic responses of an airfoil fitted with a harmonically morphing Trailing Edge Flap (TEF). An unsteady parametrization method adapted for harmonic morphing is introduced, and then coupled with dynamic meshin...
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Bonaventura Tagliafierro, Simone Mancini, Pablo Ropero-Giralda, José M. Domínguez, Alejandro J. C. Crespo and Giacomo Viccione
Computational Fluid Dynamics simulations of planing hulls are generally considered less reliable than simulations of displacement hulls. This is due to the flow complexity around planing hulls, especially in the bow region, where the sprays are formed. T...
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