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限矩轴在解决柴油机传动系统扭振破坏问题中的应用
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作者 彭启勇 《内燃机车》 北大核心 2003年第9期26-29,共4页
原柴油机驱动的F5 0 0泥浆泵组 ,动力轴系发生扭振导致万向轴频繁破坏。为此设计了液力变矩器和限矩轴 ,利用液力元件传动柔和、可有效隔绝振动的特性和湿式铜基摩擦片在设定压力下有相应的摩擦力矩范围的特性 ,通过合理的润滑、散热设... 原柴油机驱动的F5 0 0泥浆泵组 ,动力轴系发生扭振导致万向轴频繁破坏。为此设计了液力变矩器和限矩轴 ,利用液力元件传动柔和、可有效隔绝振动的特性和湿式铜基摩擦片在设定压力下有相应的摩擦力矩范围的特性 ,通过合理的润滑、散热设计 ,从理论和实践上解决了扭振造成的疲劳破坏问题 。 展开更多
关键词 柴油机 传动系统 扭振破坏 限矩轴 泥浆泵组 液力变矩器 动力 铜基摩擦片
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Finite element analysis of couple effect of soil displacement and axial load on single inclined pile
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作者 王丽 郑刚 欧若楠 《Journal of Central South University》 SCIE EI CAS 2014年第9期3656-3664,共9页
The couple effect of soil displacement and axial load on the single inclined pile in cases of surcharge load and uniform soil movement is discussed in detail with the methods of full-scale field tests and finite eleme... The couple effect of soil displacement and axial load on the single inclined pile in cases of surcharge load and uniform soil movement is discussed in detail with the methods of full-scale field tests and finite element method. Parametric analyses including the degree of inclination and the distance between soil and pile are carried out herein. When the displacement of soil on the left side and right side of a pile is identical, deformation of a vertical pile and an inclined pile is highly close in both cases of surcharge load and uniform soil movement. When the couple effect of soil displacement and axial load occurs, settlement of an inclined pile is greater than that of a vertical pile under the same axial load, and bearing capacity of an inclined pile is smaller than that of a vertical pile. This is quite different from the case when the inclined pile is not affected by soil displacement. For inclined piles, P-Δ effect of axial load would lead to a large increase in bending moment, however, for the vertical pile, P-Δ effect of axial load can be neglected. Although the direction of inclination of piles is reverse, deformation of piles caused by uniform soil movement is totally the same. For the inclined piles discussed herein, bending moment(-8 m to-17 m under the ground) relies heavily on uniform soil movement and does not change during the process of applying axial load. When the thickness of soil is less than the pile length, the greater the thickness of soil, the larger the bending moment at lower part of the inclined pile. When the thickness of soil is larger than the pile length, bending moment at lower part of the inclined pile is zero. 展开更多
关键词 couple effect inclined pile surcharge load uniform soil movement axial load
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