Vortex induced vibration of submarine pipeline span is the major factor of resonance invalidation of pipeline.
海底管跨的涡激振动是引发管跨共振失效的主要因素。
Vortex induced vibration of submarine pipeline span is the major factor of resonance invalidation of pipeline.
管跨结构的涡激振动分析是海底管线疲劳分析和安全评价的重要环节。
Vortex induced vibration on underwater pipeline is related closely with its natural frequencies which are also related with its mass and added mass.
通过数值计算证明了物体的附加水质量不仅与物体形状有关，在一定条件下还受流体边界的影响。
Taking the advantage of numerical simulation that can simulate the different types of boundary conditions, the vertical vortex induced by the asymmetric initial flow is simulated too.
运用数值模拟具有能模拟各种不同边界条件的优势，还对非对称来流条件下形成的立轴旋涡进行了模拟。
This paper studies the calculation of vortex-induced responses of Bridges by finite element models.
本文研究用有限元法计算桥梁涡激振动的时程响应。
In this paper, firstly, relations of first two harmonic induced velocities to the lower and same-order harmonic circulations are obtained from the generalized classical vortex theory of the rotor.
本文从旋翼的广义经典涡流理论出发，通过环量对诱导速度的贡献的简化处理，推导出旋翼诱导速度的二阶分布。
On the basis of static aerodynamic force tests and dynamic response tests, the galloping and (vortex-induced) oscillation performances of H-shaped booms were investigated.
通过节段的静力和弹簧悬挂动力试验，对H型吊杆的驰振和涡激振动性能进行分析。
The nonuniform distribution of induced velocity on the rotor disk derived from the generalized vortex theory is taken into account.
诱导速度在桨盘处的分布采用广义涡流理论所导的公式。
The nonuniform distribution of induced velocity on the rotor disk which is derived from the wang's generalized fix vortex theory is taken into account.
诱导速度在桨盘处的分布则采用王氏固定涡系涡流理论所导出的诱导速度非均布公式。
The paper concerns the stability of Tension Leg Platform (TLP) tethers nonlinear oscillation induced by vortex shedding.
本文研究海洋张力腿平台的张力腿由于涡激产生的非线性振动的稳定性。
The paper makes a study of the induced vibration in the structure under the effect given by macrosonic sound and the vortex.
本文研究了结构在强声和旋涡双重作用下的结构诱发振动问题。
The symmetry vortex of water induced by particle clouds does not synchronize with the motion of particle clouds, and the symmetry vortex is the key reason for clouds to disperse.
泥沙云团在加速下沉阶段所引起水的对称涡与泥沙云团的运动是不同步的，对称涡是引起泥沙云团扩散的重要因素。
For Francis turbines, the pressure pulsation in draft-tubes induced by helical vortex rope is one of the main problems and it would seriously affect the safe operation of the unit.
混流式水轮机尾水管内螺旋形涡带引起的压力脉动是造成混流式水轮机组振动的主要根源之一，严重威胁机组的安全运行。
The desingularization smoothing parameter is introduced in calculating the induced velocity on trailing vortex surface.
在诱导速度计算中引入了非奇异光滑参数。
The experiment shows that the PIV technique can be utilized to measure the unsteady complex flow of passive vibration, and analyses the vortex-induced vibration.
试验证明了PIV技术可以应用于被动振动非定常复杂流场的测量中，并对两维翼流体旋涡诱发振动响应进行了分析。
Both lift line model and generalized wake model are founded in this paper. A method is given for calculating induced velocities by a wake vortex line which results in a rapid convergence.
建立了旋翼升力线模型和广义尾迹模型，在计算角迹涡线诱导速度时，采用了快速收效方法。
The vortex wake and its induced velocity of a helicopter rotor operating near the ground at low forward speeds have been studied using a simplified free wake-ground vortex model.
本文用一简化自由涡模型模拟旋翼尾涡系，用一简单涡模拟地面涡，对近地低速飞行时旋翼尾涡系的畸变及其引起的诱导速度变化作了研究。
Air induced by entrained-vortex occurring in the pump sump can be absorbed into the pump, which can influence the operation stability of pump and reduce the pump performance.
水泵吸水池中可能会产生空气吸入涡，这些涡能够将空气带入水泵，影响水泵的运行稳定性，造成水泵的性能下降。
In this paper, multigrid fictitious boundary method(MFBM)is applied to direct numerical simulation of vortex-induced motions of multi-cylinders in viscous flows.
本研究利用多重网格虚拟边界有限元法（MFBM）数值模拟多圆柱涡激运动问题。
Objective To investigate the efficacy of acute ocular hypertension of rabbits induced by cauterizing vortex veins.
目的探讨涡静脉烧灼法诱发兔急性高眼压的效果。
The calculated results indicate that the across-wind loads of high-rise buildings with square sections are induced mainly by vortex shedding and are narrow-band random processes.
得到如下结论：高层建筑横截面为方形时，其横风向风荷载主要由规则性旋涡脱落导致的尾流激励构成，为窄带随机激励；
Thus it is necessary to study vortex-induced vibration of bridge.
因而对桥梁涡激振动进行研究是很有必要的。
The prediction of vortex-induced vibration is very important for the design of slender marine structures in deep water.
涡激振动响应预报对于深水海洋结构物的设计是非常重要的。
Vortex-excited vibration induced by fluid takes place on the underwater suspended pipelines.
单跨和多跨水下悬空管线在水流作用下发生涡激振动。
The main form of the rod wind vibration is crosswind vibration, called the vortex-induced vibration according to the reason.
岸边起重机杆件的风致振动的主要表现形式为横风向的振动，按发生原因称为涡激振动。
Periodical variations of tether's tension caused by heaving oscillation of TLP play the role of a parametric exciter to vortex-induced vibration, and make it more complicated.
张力腿平台的垂荡引起张力周期性变化，对张力腿的涡激横向振动起参数激励的作用，使其动力响应更为复杂。
Vortex-induced vibration is limited amplitude response, but it occurs at low wind speed with relative large amplitude, which will affect the strength and fatigue resistance of the structure.
尽管涡振是一种限幅振动，但由于其发生风速较低，振幅相对较大，会影响结构的强度和疲劳，因此大跨度拱桥的涡振响应研究具有重要的意义。
The test showed that: in each test state, the harmful vortex-induced vibration has not been found in the main beams and the bridge towers.
试验结果表明：在试验的各状态下，主梁及桥塔均未发现有害的涡激振动。
The test showed that: in each test state, the harmful vortex-induced vibration has not been found in the main beams and the bridge towers.
试验结果表明：在试验的各状态下，主梁及桥塔均未发现有害的涡激振动。
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