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RISS 인기검색어
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- 저자 : Yuan Zihao (검색결과 2 건)
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Modeling and vibration characteristics analysis of a DMF rotor system
Liping Zeng,Jieliang Liu,Zihao Wan,Liquan Song,Xingxing Yuan 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.6
To analyze the vibration response of a rotor system with circumferential short spring dual mass flywheel (DMF) when the primary flywheel speed changes, the interactions (forces and torques) between the primary flywheel, spring seat, spring, and secondary flywheel are analyzed in detail, and the dynamic analysis model of the DMF rotor system is established considering the influence of clearance and friction between parts in the DMF in this study. The vibration response of the DMF is investigated by numerical method. By analyzing the bifurcation diagram, time history, phase trajectories, Poincaré section, and frequency domain of the relative angular displacement, the variation of vibration form of the system under different excitation frequencies are discussed. Besides, the effects of load, primary flywheel speed amplitude, and spring stiffness on system vibration are also analyzed. Finally, some of the results from the analytical study are verified through the DMF rotor system experiments.
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Influence of lead exposure on growth and transcriptome in wolf spider Pardosa laura
Hu Lang,Wen Lelei,Wang Lieping,Zheng Cao,Yuan Zihao,Li Changchun 한국응용곤충학회 2024 Journal of Asia-Pacific Entomology Vol.27 No.1
As a raw material commonly used in industrial production, Pb is often found in the released waste, posing a serious threat to ecosystem and human. Pardosa laura (Araneae: Lycosidae) is one of the most dominant species of spider found in farmland ecosystem and plays a very important role in Pb transfer among the food web. To comprehensively understand the toxicological effects of Pb on spider, we delivered Pb to Pardosa laura through diet, and investigated the Pb effect on spider growth, antioxidase activities and transcriptome. Specifically, Pb hindered the spider growth and resulted in a reduced survival rate. Superoxide dismutase and catalase activities were enhanced in the Pb-exposed spider, while no significant change was found in the glutathione S-transferase activity. 117 up-regulated genes and 60 down-regulated genes were identified in the Pb-exposed spider by using transcriptome sequencing, and these DEGs were mainly enriched in oxidoreductase activity, transmembrane transport, fat digestion and absorption, peptidase activity, apoptosis, peptidase activity and lysosome. The results of this study contribute to the better understanding of the molecular mechanisms underlying the spider response to Pb.
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