压力脉动

本文将B样条神经网络用于有源压力脉动衰减系统。

In this paper , B spline neural network is introduced into active attenuator for pressure pulsation .

利用CFD方法对压力脉动衰减器进行分析；

The analysis of the pressure pulsation attenuator was made in CFD method .

基于RBF的风机压力脉动神经网络主动控制

Active Hydrodynamic Control Using NN Based on RBF in Wind Duct

对计算结果进行FFT（FastFouriertransform）变换，获得了记录点的压力脉动频率，计算结果与实测结果吻合很好；

The results were analyzed by FFT ( fast Fourier transform ) to determine the pressure oscillation frequencies at different points .

并对内部固定位置瞬态速度变化特征，给出了速度的变化曲线，得到了尾水管进口直径位置上的2D速度分布，从而对进口速度对尾水管内压力脉动控制，提供一定的试验依据。

Through measuring the transient velocity character of a fixing point , the 2D-velocity distributions character has also been made .

气固流化床压力脉动信号的Wigner谱分析

Pressure fluctuations analysis of gas-solid fluidized bed using the Wigner distribution

底饲进料循环喷动床内压力脉动信号的SHANNON信息熵分析

A Shannon Information Entropy Analysis of Pressure Fluctuation Signals From an Underfed Circulating Spouted Bed

YB1&100叶片泵存在噪声高，压力脉动大，性能稳定性差的问题。

The present problems of YB_1-100 vane pump are high noise , large pressure pulse and poor stability .

通过水压力脉动数据的FFT频谱分析，研究了直锥段和尾水管内部在不同位置不同工况下的压力脉动在时域及频域上的变化规律。

With the FFT analysis it is analyzed that the pressure surge changing laws in the taper pipe and draft tube in time domain and frequency domain .

利用压力脉动模型对长白山阔叶红松林冬季土壤释放的CO2在雪层中的扩散过程进行模拟，进而估算土壤呼吸。

The diffusion of CO2 released from soil through the snow layer in the broadleaved pine forests in Changbai Mountain was simulated with pressure-pumping models , and soil respiration was estimated .

建立斜流泵瞬态性能测试实验台，进行了瞬态外特性、PIV内流测量和瞬态压力脉动测量。

The test-bed for mixed-flow pump transient starting performance was developed , and the transient overall characteristics , PIV internal flow and transient pressure pulsation were measured .

三峡水电厂左岸ALSTOM机组尾水管压力脉动分析

Analysis of Pressure Fluctuation in the Draft Tube of ALSTOM Units in the Left Bank of Three Gorges Hydropower Station

结果表明，由压力脉动引发的空气对流对雪被CO2通量的瞬间影响十分显著，但是当时间达到小时的水平时，空气对流的影响便几乎可以忽略。

Result showed that the transient impact of fluctuations induced by atmospheric pressure variation on CO2 fluxes is significant , but the impact can be nearly eliminated at a long-time scale ( over an hour ) .

根据实际操作中压力脉动的运行参数，采用Fluent软件对该新型减振器的流体流动情况进行了数值模拟计算。

According to the actual operation pressure pulsation in the running parameters , the simulated calculation has been used to analyses the fluid flow of the new type shock fluid by using Fluent software .

用Wigner谱首次对气固流化床压力脉动信号进行时频二维分析，压力脉动信号的强非平稳性得到了证实。

In this paper , the signal s strong non-stationary feature is demonstrated with time-frequency two-dimensional analysis by using the Wigner Distribution ( WD ) for pressure fluctuation signal in gas-solid fluidized beds .

利用最新发展的直升机旋翼气动声学程序计算了某模型旋翼桨涡干扰（BVI）噪声，叶片表面非定常压力脉动数据由最新实验获得。

A newly developed helicopter rotor aeroacoustics code and newly obtained unsteady surface pressure data on the blade of a model helicopter rotor are used to predict rotor blade vortex interaction noise .

采用188mm的内径和400mm的静床高，以GeldartB类和D类颗粒为实验物料，进行了压力脉动信号的统计分析和功率谱分析。

A static bed height of 400 mm and an inner diameter of 188 mm were adopted , and particles of Geldart B and D were taken as fluidized materials . Pressure fluctuation signals were analyzed with statistics and power spectrum researches .

在考虑泵的压力脉动的情况下建立了交流伺服电机驱动液压系统的数学模型，并对系统进行了开环和闭环频率特性分析，讨论了系统控制器增益参数KP的选取。

A mathematical model of the AC servo machinery driving the hydraulic system is built under the press ripple of bump , open-loop and close-loop characteristics of the system are analyzed , and the parameter of the systematic controller gain , K , is discussed .

结果表明，相比于双转换器水管理系统，三转换器水管理系统在流量稳定时，其压力脉动幅值可减小4倍左右，降噪量近10dB。

The results showed that , the peak value of pressure pulses resulting from continuous flux of the triple vessel WMS can be reduced 4 times approximately , and noise reduction 10 dB , compared to twin vessel WMS .

单气泡在压力脉动场中运动的数值计算

Calculation of Motion of a Single Bubble in Pressure Fluctuation Field

离心泵汽蚀的压力脉动判据研究

Study of pressure pulsation criterion for the cavitation of centrifugal pump

自振空化射流冲击压力脉动特性实验研究

An experimental study on impact pressure characteristics of self-resonant cavitating jets

用K-ε模式理论确定湍流压力脉动的均方值

Determination of turbulent pressure fluctuation with K - ε model theory

蓄能机组压力脉动测试研究

The Research on the Pressure Pulse Measurement for Energy Storage Units

采用蓄能器吸收压力脉动的回路配置与分析

The Circuit Disposition and Analysis of Absorbing Pressure Pulsation by Accumulator

基于非定常计算的对旋风机压力脉动分析

Analysis of Pressure Pulsation of Counter-rotating Ventilator Based on Unsteady Calculation

压力脉动周期刺激对固态发酵微生物信息传递的影响

Effect of Periodical Pulsation on Signal Transduction about Microorganism of SSF

尾水管压力脉动检测方法研究

Study on the Method of Detecting Pressure Fluctuation in Draft Tube

应用谱理论研究压力脉动的湍流模式

Investigation of the Turbulent Model for Pressure Fluctuations with Spectral Theory

因此压力脉动的幅值越小，主频也越小。

And amplitude of pressure fluctuation and main frequency decrease accordingly .