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Michael Reiterer and Joachim Muik
In this paper, parametric forced tuned solid ball dampers (TSBD) are considered for vibration control of engineering structures in an untypical way. The special feature of the presented investigation is to evaluate the potential application of parametric...
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Nicola Petacco, Valerio Ruggiero and Paola Gualeni
The IMO?s second-generation intact stability criteria (SGISc) have been applied to a set of seven megayacht units ranging from 40 m to 80 m. The application aims to evaluate their stability performance in a seaway. The assessment is based on two vulnerab...
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Estela Barroso Barderas, Rafael Bardera Mora, Ángel Antonio Rodriguez-Sevillano and Juan Carlos Matías García
Bird tails play a key role in aerodynamics and flight stability. They produce extra lift for takeoff and landing maneuvers, enhance wing functions and maintain stability during flight (keeping the bird from yawing, rolling and pitching, or otherwise losi...
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Xiaofeng Wang, Xiuyan Liu, Jinlong Wang, Xiaoyun Xiong, Suhuan Bi and Zhaopeng Deng
As a critical component of rotating machinery, rolling bearings are essential for the safe and efficient operation of machinery. Sudden faults of rolling bearings can lead to unscheduled downtime and substantial economic costs. Therefore, diagnosing and ...
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Junru Li, Shengshi Xie, Fei Liu, Yaping Guo, Chenglong Liu, Zhenyu Shang and Xuan Zhao
To improve the accuracy of discrete element simulation in the process of separating potato?soil mixtures, the contact parameters of sandy soil with 3, 6, 9, and 12% water content were calibrated in DEM simulation using EDEM software simulation. The error...
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Nicola Petacco, Danilo Pitardi, Carlo Podenzana Bonvino and Paola Gualeni
A methodology is presented to systematically modify the hull shape of a ballast-free container ship, in order to manage the issue of righting lever variation in waves. The IMO second generation intact stability criteria have been identified as a stabilit...
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M. S. Patel, M. S. Liew, Zahiraniza Mustaffa, Ng Cheng Yee and Andrew Whyte
The stability of FPSO or offloading shuttle tanker may be affected in wave conditions which excite parametric rolling. The offloading operations are thereby ceased and eventually leads to loss in production which affects the revenue of global production,...
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Zhiyong Zhang, Thomas Sattel, Yujie Zhu, Xuan Li, Yawei Dong and Xiaoting Rui
Varying compliance (VC) is an unavoidable form of parametric excitation in rolling bearings and can affect the stability and safety of the bearing and its supporting rotor system. To date, we have investigated VC primary resonance in ball bearings, and i...
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Radoslav Tomovic
In this paper, a simplified approach in the analysis of the varying compliance vibrations of a rolling bearing is presented. This approach analyses the generation of vibrations in relation to two boundary positions of the inner ring support on an even an...
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Michael Flouros, Peter Gloeckner, Markus Hirschmann, Matthias Martin, Francois Cottier and Dimitra Papailia
Rolling element bearings for aero engine applications have to withstand very challenging operating conditions because of the high thermal impact due to elevated rotational speeds and loads. The high rate of heat generation in the bearing has to be sustai...
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