1) gear walking
纵向抖振
1.
Chinese aircraft engineers are now much interested in understanding better the longitudinal nonlinear buffet of main landing gear (also called gear walking) during aircraft taxiing And braking on the runway.
讨论了缓冲器支柱结构设计参数对纵向抖振的影响，提出了若干可供实际设计参考使用的建议。
2) longitudinal judder(jitter)
纵向抖动
3) longitudinal vibration
纵向振动
1.
Study of longitudinal vibration model of mine lifting container;
矿井提升容器纵向振动模型研究
2.
Experimental study on longitudinal vibration characteristics of pendulum assembly in straight hole;
直井眼钟摆钻具纵向振动特性的实验研究
3.
ANSYS-based finite element analysis method of longitudinal vibration of drilling string and its application;
基于ANSYS的钻柱纵向振动有限元分析及应用
4) vertical vibration
纵向振动
1.
In this paper,one-dimensional vertical vibration model of deep well drilling string is estabilished.
以深井中的整体钻柱为研究对象 ,建立了深井钻柱一维纵向振动分析模型 ,采用动力有限元理论建立了描述钻柱振动的动力学方程 ,并且编制了一套钻柱纵向振动分析软件 ,最后使用该软件对深井实用的钻具组合针对不同的工况进行了分析计算。
2.
The partial differential equation analyzing the nonlinear vertical vibration of the pile was first derived.
假设嵌岩桩桩身材料满足非线性弹性和线性粘弹性本构关系,桩周土为有阻尼非线性弹性土体,从而导出了分析基桩非线性纵向振动的偏微分方程;用Galerkin方法对方程进行简化,对简化后的系统进行了数值模拟计算,得到了一种典型参数情形时基桩运动的时程曲线、相平面图、功率谱图、Poincare截面图及分叉混沌图,考察了各种材料及结构参数对基桩非线性纵向振动的影响。
3.
Based on vertical vibration theory,assuming the segment above the defect is a rigid body,and the segment with the defect is a linear spring,an analysis method for the location and level of shallow defect is given.
本文采用振动理论,将浅部缺陷以上桩段假设为刚体,缺陷处的桩身假设为弹簧,通过对浅部缺陷桩的纵向振动分析,提出了一种利用频谱分析技术分析浅部缺陷位置和程度的方法,检测实例验证了该方法的正确性。
5) Axial vibration
纵向振动
1.
Analysis of the influence of drilling fluid on axial vibration of drill string;
钻井液对钻柱纵向振动影响分析
2.
This paper presented the principle and method of calculation for the axial vibration based on Rayleigh differential method of crankshaft for a high speed diesel engine.
采用瑞利法对高速内燃机曲轴纵向振动进行研究。
3.
The reliability mode and the safety probability of the random axial vibration systems of rods are defined as a series mode, a.
根据随机连续杆纵向振动系统的固有频率与激振频率差的绝对值不超过规定值的关系准则,定义了随机连续杆纵向振动系统的可靠性模式和系统的可靠度,提出了避免共振的频率可靠性分析方法,对随机连续系统共振问题的准失效分析方法进行了探索。
6) longitudinal resonance
纵向共振
1.
With the effect of damping and longitudinal resonance concerned, an analyzing method for the dynamic stability of columnar structures is discussed and formulas for instability zone are derived.
本文推导了有阻尼与发生纵向共振时柱状结构的动力稳定计算公式。
2.
An analyzing method to study the effect of damping and longitudinal resonance on the dynamic stability of columnar structures is discussed and formulas for investigate its instability zone are derived.
推导了有阻尼与发生纵向共振时柱状结构的动力稳定计算公式 ,计算了水中平台动力失稳区间 ,探讨了阻尼与纵向共振的影响 ,得出了一些有应用价值的结
3.
The effects of the damp of strueture and longitudinal resonance have been considered at the same time.
研究了弹性结构动力稳定问题，考虑了结构阻尼及纵向共振时的影响，得出了一些有益规律，这在以往都是无人问津的。
补充资料：抖振
| 抖振 buffeting 边界层分离或湍流激起结构或部分结构的不规则振动 。激振力几乎不受振动本身的影响。主要实例为飞机尾翼的抖振。当飞机作跨声速飞行时，机翼表面有局部超声速区，该区以激波结束。激波与翼面上的边界层有强烈的相互作用 ，当激波强度足够大时，导致边界层分离。分离气流很不稳定，当其流向下游冲击尾翼时，就使尾翼发生抖振。发生抖振的飞行马赫数同翼剖面的形状和迎角有关。当自由流速达到超声速时，激波移至后缘，抖振消失。此外，飞机作低速大迎角飞行时，机翼表面及翼身结合处的边界层严重分离，挟带大量混乱涡的分离气流冲击尾翼同样引起抖振。抖振严重时，飞机有可能在空中解体。 |
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