1) dry whip
![点击朗读](/dictall/images/read.gif)
反向涡动失稳
1.
Then the mechanism of the onset of dry whip under imbalance excitation is investigated and the onset condition is derived.
本文通过非线性动力学方法对Jeffcott转子—定子模型的同频全周碰摩解(synchronous full annular rub)的稳定性和反向涡动失稳(dry whip)的发生机制和条件进行了解析分析,确定了实验观测到的几种不同的碰摩响应对系统参数的依赖关系,给出了两个不同碰摩实验得到不同碰摩响应序列的原因。
2) backward whirling
![点击朗读](/dictall/images/read.gif)
反向涡动
1.
Bottom drillstring is often in backward whirling during drilling operations,which cause drill tools and bits to be damaged.
钻井过程中,下部钻柱通常处于反向涡动状态,易造成钻具和钻头的损坏。
3) churning loss
![点击朗读](/dictall/images/read.gif)
涡动损失
5) Cross deformation
![点击朗读](/dictall/images/read.gif)
横向失稳
6) lateral buckling
![点击朗读](/dictall/images/read.gif)
侧向失稳
1.
Meanwhile,not only the webs are likely to have local buckling,but also the compressed flanges are likely to have lateral buckling in the region of negative bending moments.
对于组合梁正弯矩区段,主要发生腹板局部屈曲;对于负弯矩区段,不但可能发生受压翼缘的侧向失稳,而且也可能发生腹板的局部屈曲。
2.
Based on the theoretical analysis of steel-concrete composite box-beams’ lateral buckling,computational model on the stability of composite box-beams are proposed.
本文通过对组合箱梁侧向失稳形式的理论分析,提出组合箱梁稳定性分析的计算模型,采用能量法对钢-混凝土组合箱梁负弯矩区的侧向稳定性进行探讨,推导在等端弯矩作用下组合箱梁在弹性受力阶段时的临界失稳弯矩计算公式,确定箱型组合梁负弯矩区稳定设计的修正方法和建议意见,通过研究对比表明本文提出的计算公式比现行组合梁的稳定理论和计算方法具有更高的可靠性和经济性。
3.
And this dissertation studies the stability of composite beam in the following aspects:1) Based on the theoretical analysis of steel-concrete composite box-beams\' lateral buckling, analytical model on the stability of composite box-beams is put forward, and the formula which is used to calculate critical bending moment in negative bending regions is deduced.
钢—混凝土组合箱梁的侧向失稳和局部失稳是影响承载能力的重要因素。
补充资料:裂纹失稳扩展
分子式:
CAS号:
性质:材料内部裂纹尖端的应力场强度因子达到或超过材料的断裂韧性之后发生的裂纹快速扩展。裂纹失稳扩展将导致材料迅速断裂。
CAS号:
性质:材料内部裂纹尖端的应力场强度因子达到或超过材料的断裂韧性之后发生的裂纹快速扩展。裂纹失稳扩展将导致材料迅速断裂。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条