脈動壓力 的英文怎麼說
中文拼音 [màidòngyālì]
脈動壓力
英文
fluctuating pressure-
The advantage and disadvantage of measurement of propeller - induced pressure by using different equipment is discussed. the method to obtain self - propulsion point for full scale in depressurized towing tank is studied. the measurements of pressure of two propeller models are carried out, the results of the measurement agree with those obtained by cavitation tunnel very well, which proves this measurement is successful, and the theoretical prediction is verified too
比較了不同測試設備用於螺旋槳脈動壓力測試的優缺點，探討了在減壓拖曳水池中實現實船自航點的方法，並進行了兩只螺旋槳模型的脈動壓力測試，經與空泡水洞中脈動壓力的測試結果進行比較，說明該項測試是成功的，同時也對脈動壓力的理論預報結果做了驗證。Study on pulsating stress of turbulence with strange attractor theory
用奇怪吸引子理論研究紊流脈動壓力特性Motion - induced electromagnetic noise of antenna under random and fluctuant pressure
天線在隨機脈動壓力作用下的運動感應電磁噪聲Fluctuant characteristics analysis of sidewall and bottom behind sudden lateral enlargement and vertical drop form
突擴突跌布置側墻及底板脈動壓力特徵分析Hydrodynamic pressure is measured with pressure sensors
動水壓力用脈動壓力傳感器進行測量。In light of the limitation of fast fourier transform ( fft ) for the method of traditional spectrum analysis to analyze the unsteady signal, wavelet and wavelet analysis are made for the typical unsteady process signal of starting up and shut down with the good characteristic of simultaneous localization in both the time and the frequency domains based on the field test on the vibration of two - row placed units in lijiaxia hydropower station, in which the signal is decomposed into different frequency band, and then the weak signal is caught and the dominant frequency is picked up for the analysis of the vibration source
摘要基於李家峽水電站雙排機組振動的現場試驗研究，並且針對傳統頻譜分析方法傅立葉變換（ fft ）對于非平穩信號已力不從心這一缺陷，利用小波分析方法在時域和頻域上同時具有良好的局部化性質，通過對開停機這一典型非平穩過程信號進行小波及小波包分析，將其分解到不同頻帶內，獲取微弱信息和提取優勢頻率，並對其作振源分析，得出開停機初始時刻因水流不穩均出現強烈的振動現象，且低頻段信號能量最大，開停機過程水流脈動壓力和尾水渦帶擺動是引起定子基礎振動的主要原因。The prediction error percentage of the 52000t all - purpose cargo ship compared with the model test result is 21. 8 %, 300000t vlcc compared with the measured value is merely 3. 64 %
用該公式預報的5 . 2萬噸多用途貨船的脈動壓力值與空泡水筒中的實驗值相比誤差為21 . 8 % ；預報了30萬噸超大型油船的激振力並由該激振力算出的尾端振動速度值與實測值相比誤差僅為3 . 64 % 。Oscillometric method is the advanced method for the no invasion blood pressure measurement. it qualitatively provides the order of the pulse pressure signal ' s changing with the cuff pressure and quantificationally points out the relationship between the mean blood pressure value and the pulse wave signal. so this method gives us a more scientific way to find other blood pressure parameters
測振法（ oscillometricmethod ）是無創血壓測量中先進的檢測方法，它定性地揭示了脈動壓力信號隨袖帶壓力變化的規律，並給出了平均壓與脈搏波信號的定量關系，為血壓參數進一步確定提供了一條更為科學的方法。This paper gives a review on the five analysis approaches of fluctuation pressure on the hydraulic structures and hydromachines : the method of probability and random process, the method of time - space correlation, the method of fitting data, the method of distribution hypotheses on the data of test survey stations, and the hydromechanics method
摘要綜述了水工建築物及水利機械上脈動壓力的五種分析方法：概率和隨機過程法；時空相關法；數據擬合法；根據實驗測點數據分佈假設法；流體力學方法。3 ) open - water and self - propulsion tests for the hd propeller and mau propeller. 4 ) cavitation observation and pulsing pressure measurement
3 ）滬東型（ hd ） mau圖譜槳的敞水試驗和自航試驗4 ）滬東型（ hd ）螺旋槳的空泡觀察與脈動壓力測量。In order to analyze the fluid dynamic characteristic in seawater pipeline system, the test device of fluid dynamic characteristic in seawater pipeline system is set up. in this experiment, the velocity of pressure wave propagation is measured by frequency analysis technique and the measured result is reliable. according to the frequency analysis technique and a basic theory of linear transfer matrix, the pulsation pressure value in pipeline is predicted by the measured values from four pressure transducers
為了分析海水管路系統內流體的動態特性，建立了海水管路系統流體動態特性實驗臺架；在實驗中利用譜分析技術對壓力波傳遞速度進行了測量，測量結果可信；並利用譜分析技術及線性傳遞矩陣基本理論，通過多個壓力傳感器的測量值預測了管路中的脈動壓力值，實驗結果與理論計算之間吻合很好；分析了流體動態特性實驗臺架本身的自循環特性對海水管路系統中脈動壓力測量的影響。Presently most of the theoretical method to predict the propeller - induced hull pressure fluctuation is based on the calculation method in which the pressure is induced by pulsating source in infinite flow. the calculation method is adopted and the corresponded computer program is complied. the propeller - induced hull pressure fluctuation due to blade thickness, blade load, cavity thickness and the change of the cavity volume can be analyzed respectively in the computer program
目前，螺旋槳誘導的船體表面脈動壓力的理論預報方法，大多是以無限流場中點脈動源誘導的周圍流場的脈動壓力的計算方法為基礎的，本文採用該方法編制了計算程序，可以分別考慮槳葉厚度、槳葉負荷、槳葉上空泡厚度及其體積變化在船體表面指定位置上產生的脈動壓力。The pressure parameters testing of airplane engine is based on zero dead time parallel acquisition technology to test the pressure signals which were tranfered from pressure sensor
航空發動機脈動壓力的測試基於多通道無間隔并行採集技術，對壓力傳感器傳送的脈動壓力信號進行採集測試。With the fund item sponsored by the national laboratory of hydrodynamics, the study on measurement method of propeller - induced pressure with using self - propulsion model has been carried out in depressurized towing tank
在脈動壓力的模型測試研究方面，本文在水動力學國家重點實驗室基金項目的資助下，對在減壓拖曳水池中利用自航模進行空泡螺旋槳誘導的脈動壓力的測試方法進行了研究。The prediction of propeller - induced hull pressure fluctuation in non - uniform flow is studied by using theoretical calculation and model experiment systematically. an intact method and computer program for the prediction of unsteady cavitating propeller - induced hull pressure fluctuation in non - uniform flow is set up in this paper. the measurement of propeller induced hull pressure fluctuation in depressurized towing tank carried out in this paper is the first time inland
本文從理論計算和模型試驗兩個方面系統地研究了不均勻流場中螺旋槳空泡誘導的船體表面脈動壓力的預報問題，建立了一套完整的預報非定常空泡螺旋槳誘導的船體表面脈動壓力的方法和程序，並在國內首次完成了在減壓拖曳水池中進行空泡螺旋槳誘導的船體表面脈動壓力測試。The analysis of dynamic response of ship hull subjected to gas bubble impulsive pressure of underwater explosions
水下爆炸氣泡脈動壓力下艦船動態響應分析By employing cole ' s classical theory of bubble dynamics, the motion of bubble produced by the underwater explosion and the corresponding bubble pulsating pressure are calculated. a profile function of the shock wave and its parameters are determined according to the principle of wave profile similitude and the equality of impulses. finally an analytic formula is derived to simulate the whole time history of the pressure from the front shock wave to the bubble pulsation, representing the fluid loadings of the underwater explosion
木文首先應用庫爾的經典水下爆炸氣泡運動理論計算出氣泡的運動和脈動的壓力波形，再依據波形相似的原則尋找波形模擬函數，用沖量相等的原則確定波形參數，得出了從沖擊波到氣泡脈動壓力整個過程對水下爆炸載荷進行模擬的解析公式。According to the selected project, a stability test with scale of 1 : 35 of cushion bottom had been done. with the research results of the experiments and the flow shape of xiao wan hydraulic power station were thought about, on the other hand, the ternary complex jet shape of baishan water cushion was analyzed, all this gave a base for the analysis of the force of the cushion bottom. through observation, the dynamic water pressure, the fluctuation pressure, the time - homogeneous pressure on the surface of the bottom and the characteristics of the fluctuation pressure could be got, also the calculation method and the test results were compared to get the argument
針對選定的方案，進一步做了1 ： 35比尺的水墊塘底板穩定性試驗；通過試驗及借鑒小灣水墊塘內水流流態的研究成果，分析白山水墊塘內三元復雜淹沒射流流態，為水墊塘內底板受力分析打下基礎；通過觀測得到水墊塘底板動水沖擊壓力、脈動壓力、底板上下表面的時均壓力及脈動壓力特性，並通過計算方法與試驗成果進行相互比較論證。This thesis mainly discussed the pressure parameters testing model of the system
本文主要討論的是該系統中的脈動壓力參數測試模塊。The measurement system is based on pci bus and designed to integral measure the engine ’ s parameters such as pressure, engine rotate speed, air flux, etc. the system is very important in evaluatiang 、 ameliorating and repairing airplane engine because it provides relevant exam data for the airplane engine design
該測試系統基於pci總線，對發動機的脈動壓力、轉速擺動、燃油流量等參數進行綜合測試，為航空發動機的研製提供相應的試驗依據，對發動機的性能評估、技術改造、故障維修等具有十分重要的意義。分享友人