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SIMULATION OF UNDER-WATER LAUNCHED MISSILE’S WATER-EXIT LOAD
LI Guoliang, YUAN Xiangjiang, AO Lin
Mechanics in Engineering    2013, 35 (4): 25-30,24.   DOI: 10.6052/1000-0879-13-077
Abstract713)      PDF(pc) (1393KB)(1071)       Save

The high-speed missile in water is wrapped by cavitations, which implies a heavy water-exit load. It is essential to obtain the pressure distribution as whole in order to compute the load. However, it is not possible in reality. In this paper, the water-exit process is simulated by the FEM (finite element method) liquid-solid coupling method. Based on some fundamentals of the theoretical mechanics, the impact and the impact moment are computed. Using NASTRAN, the maximum corresponding bending moments in all cross-sections are obtained. The results show that the computation in this paper can predict and assess the water-exit process of the vehicle.

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TEMPERATURE REBOUND ANALYSIS OF THE IRRIGATED AREA OF A HIGH ARCH CONCRETE DAM UNDER CONSTRUCTION
HUANG Yaoying, ZHOU Shaowu, ZHOU Yihong, TANG Guoqing
Mechanics in Engineering    2013, 35 (4): 36-39,59.   DOI: 10.6052/1000-0879-13-050
Abstract591)      PDF(pc) (1047KB)(865)       Save

For a temperature rebound in the irrigated high arch dam, a statistic analysis is carried out, with consideration of the temperature rebound values in the irrigated area about the extra high arch dam, Xi Luo Du which is under construction. The irrigated concrete block, without impounding water, is approximately simplified as a concrete slab, and the irrigated temperature rebound phenomenon is analyzed, based on the theory of the natural cooling or rebound of the concrete. It shows that the current high arch dam's closure temperature is lower than the dam site's average temperature, so the dam site's temperature inevitably would flow backward, slowly, to the irrigation area. Moreover, the theoretical temperature rebound value is close to the actual temperature rise in the irrigated area. Therefore, the main cause of the temperature rebound in the irrigated high arch dam is that the environment temperature flows backward, slowly, to the irrigation area.

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Cited: Baidu(2)
Dai Shiqiang
Mechanics in Engineering    2010, 32 (4): 120-121.   DOI: 10.6052/1000-0879-lxysj2010-330
Abstract1439)      PDF(pc) (197KB)(432)       Save
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Wu3Ji4Ke3
Mechanics in Engineering    2010, 32 (4): 123-124.   DOI: 10.6052/1000-0879-lxysj2010-335
Abstract1404)      PDF(pc) (250KB)(649)       Save
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The Contributions of Maxwell to Applied Mechanics
Mechanics in Engineering    2010, 32 (2): 150-153.   DOI: 10.6052/1000-0879-2009-518
Abstract1612)      PDF(pc) (653KB)(883)       Save
Maxwell not only holds a great position in classical physics, but also made important contributions to applied mechanics. His research on mechanics deals with elastic mechanics, photo-elasticity, structural mechanics, visco-elastic mechanics, celestial mechanics, fluid mechanics, and dynamic stability. During the process of research on applied mechanics, he can grasp the proficient mathematics and the physical nature of the problem, which is consistent with the spirit of engineering science and applied mathematics.
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In memory of Mr.Tsien Hsue-shen
Mechanics in Engineering    2009, 31 (6): 82-83.   DOI: 10.6052/1000-0879-lxysj2009-470
Abstract1290)            Save
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The rocket stusy group under the guidance of Mr.TSien Hsue-shen
Mechanics in Engineering    2009, 31 (6): 82-82.   DOI: 10.6052/1000-0879-lxysj2009-471
Abstract1349)            Save
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In memory of Mr.Tsien Hsue-shen
Mechanics in Engineering    2009, 31 (6): 82-83.   DOI: 10.6052/1000-0879-2009-470
Abstract1379)      PDF(pc) (220KB)(574)       Save
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The rocket stusy group under the guidance of Mr.TSien Hsue-shen
Mechanics in Engineering    2009, 31 (6): 82-82.   DOI: 10.6052/1000-0879-2009-471
Abstract1350)      PDF(pc) (472KB)(556)       Save
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