研究表明，低马赫数情况下叶轮离散噪声主要是由脉动力造成，为降低低马赫数下的叶轮离散噪声提供了参考。
Results show that under small Mach number the main source of discrete noise is the fluctuating force, which gives a guide for cutting discrete noise down.
利用脉动法对-试验工程进行了动力特性测试，得到了该结构的固有频率和振型。
The dynamic characteristics of an experimental structure were tested by means of pulsating method and frequencies and modes of structure are gained.
本文以GUSA型脉动减速器为例，分析说明多相并列杆机构系统的动力学分析计算方法。
This paper introduces a method of dynamic analysis of polyphase parallel connected linkage by means of the analysis of GUSA-a linkage impulsive stepless speed regulator.
液压系统动力学振动程度可用瞬时速度、压力和压力脉动描述其特性。
The dynamic vibration of hydraulic system is characteristic of instantaneous velocity, pressure and its oscillation.
为了分析海上风机结构在时域内的风振动力反应，进行了脉动风速时程数值模拟研究。
To analyze the wind-induced dynamic response of offshore wind turbine in time domain, the numerical simulation of fluctuating wind velocity time series was studied.
试验得到了具有典型倾角的拉索在不同风向角下，拉索模型上的平均风压和脉动风压系数，以及气动力系数。
Mean and fluctuating pressures and aerodynamic force coefficients on the cable model and the artificial rivulet are obtained under the conditions of typical cable inclined angles and wind angles.
此外，作物残茬、秸秆和牧草等粗糙元的高度、密度及直立性均对下垫面的空气动力学粗糙度、摩阻速度及风速脉动有一定影响。
In addition, the height, density and perpendicularity of remnant stubble, straws and grass had influence on aerodynamic roughness and wind velocity fluctuation on different underlying surfaces.
这样就可以通过对脉动压力分布进行面积加权积分，得到脉动气动力的时间历程。
Therefore the time series of aerodynamic forces can be obtained by area-weighted integral of fluctuating pressure distributions.
介绍利用大地脉动作为激振振源，测试并分析高层建筑的脉动响应信号及动力特性。
The measurement and analysis of the pulsation response and dynamic behavior of tall buildings taking the earth pulse as the vibromotive source is introduced.
结果表明理论与实测的前几阶结构动力特性基本吻合，用脉动法对桥梁结构的动力特性进行测试是有效的。
It shows that the dynamic properties of the first steps by theory essentially agree with that by practical test, and that the impulse response method is efficient in dynamic test of bridge.
根据气动力系数的脉动量急剧上升的起始点确定抖振起始边界。
The buffet onset boundary is defined as the begin point of increased suddenly fluctuating value of aerodynamic coefficients.
用脉动法由某15层百货大楼的随机响应信号中识别其动力学参数。
This paper describes the pulsating analysis technique for identifying the dynamic parameters of a 15-story building from its random response signals.
膜面的风振动力效应并不显著，可以近似采用阵风系数来考虑脉动风的瞬时增压作用。
The dynamic effect of wind induced vibration is not outstanding, and the moment pressure enlarging effect of the fluctuation wind can be approximately considered by the gust factor.
结果：89.7%患者表现有脉动指数增高等脑动脉硬化的脑血液动力学改变。
Results: the dynamic changes of cerebral blood flow with higher pulsatility index like as cerebral arteriosclerosis were found in 89. 7 per cent of the patients.
该结构电机动态响应快，并可望得到低转矩脉动，适合用作汽车的电子伺服驱动，如汽车电子动力方向盘的伺服电机。
The structural dynamic response motor Express, and is expected to be low torque ripple, suitable for automobile electronic servo-driven, As automotive electronic power steering servo motor.
我们利用计算流体动力学的方法，分析了定常流与脉动流两种条件下，支架植入引起的血管壁面剪应力的变化。
We used computational fluid dynamics(CFD) to investigate the steady and pulsatile flows in the vicinity of model stents and focused on the changes of wall shear stress caused by the implanted stents.
目前国内外电动车直流驱动功率变换器使储能电源输出电流从零到电机电枢电流高频脉动，不利于延长动力电池的使用寿命。
At present power converters of DC driving system make power supply outputs a high-frequency pulsating current, which is from zero to the armature current. This large ripple damages batteries.
结果表明：空间重力环境是影响稠密气固两相流体动力特性的重要因素，颗粒脉动强度将随着重力条件的减小而增大。
Simulation results show that the space gravity condition exerts great influence on the fluidization characters, the particles fluctuation intensity increases with the decrease of gravity especially.
结果表明：空间重力环境是影响稠密气固两相流体动力特性的重要因素，颗粒脉动强度将随着重力条件的减小而增大。
Simulation results show that the space gravity condition exerts great influence on the fluidization characters, the particles fluctuation intensity increases with the decrease of gravity especially.
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