radiation noise 中文意思是什麼
radiation noise
解釋
電磁噪聲-
Introducing the theory and application of boundary element method on the sound radiation, giving the process of solving vibration noise radiation problem using boundary element analysis software ; presenting the coupling theory and the combination analysis of finite element method and boundary element method, and doing relevant analysis based on close drum shell ; programming the noise data simulation program using the numerical calculation software, simulating the acoustic and pressure data of a key point in the transient response acoustic field of the close drum shell, realizing the audibility of the noise, using the virtual reality tools to simulate the vibration noise of the drum shell ; combining the finite element method and boundary element method to analyze the vibration noise radiation of some gear box, and completing the whole simulation process of the vibration noise of the gear box
綜合介紹了邊界元法在聲輻射問題上的理論及應用；並給出了運用邊界元法分析軟體求解振動聲輻射問題的過程。闡述了有限元法和邊界元法的耦合理論及組合分析方法，並以封閉鼓形薄殼為分析對象進行了相應的分析。利用數字計算軟體編制了噪聲數據模擬程序，並模擬了通過組合方法分析封閉鼓形薄殼瞬態響應聲場而獲得一關鍵點的聲壓數據，實現聲音的可聽化，隨后通過虛擬現實工具實現了該情形下橢球殼振動噪聲的虛擬模擬。 -
Mechanics on noise reduction of the structure is as followed : there is a very thin air layers between the matrix, so the structure of multi - layer is formed. that is metal a - air - metal b - air - metal a or metal a - air - metal b - air - metal b - air - metal a. on the cutting motivation conditions, air layer between two metal layers is flowed to - and - fro, which can absorb a part of motivation energy, so it leads to low noise radiation
該結構設計的消音機理為：層與層之間存在一層非常薄的空氣層，形成不同金屬與空氣的多層結構，即a金屬-空氣- b金屬-空氣- a金屬或a金屬-空氣- b金屬-空氣- b金屬-空氣- a金屬等多層結構。 -
In chapter 2, a simplified analytical model is presented for the analysis of the bvi mechanism, adopting the beddoes " prescribed wake model. by this model, the azimuthal location and miss - distance of the bvi and the radiation directivity of the bvi noise are calculated and discussed, and some conclusions are obtained
在第二章，使用beddoes預定尾跡模型，建立了一個用於旋翼槳-渦干擾特性機理分析的簡化數學模型，分別對旋翼槳-渦干擾位置、槳-渦干擾距離和聲輻射方向性等進行了計算和分析，得出了有意義的結果。 -
As the microbolometer which is voltage biased express some characters different from other infrared detectors under the effect of electric heat and infrared radiation together, the computing method of parameters, such as responsivity, noise, noise equivalent temperature different ( netd ), noise equivalent power ( nep ), optical gain, detectivity and so on is given in this paper. some of these parameters are particular compared with other detectors, and some have difference between microbolometer and other detectors
由於微測輻射熱計在施加偏置電壓的情況下，電熱效應與紅外輻射的共同作用使它表現出與其他紅外探測器完全不同的一些特徵，文中給出了響應率、噪聲、噪聲等效功率、噪聲等效溫差、光學增益、探測率等參數的計算方法，這些參數中的部分是微測輻射熱計獨有的，或者與其他的紅外探測器的同一參數有所區別。 -
Based on the analysis and study of the primary principle and countermeasure process of the underwater acoustic countermeasure equipments, the mathematical models of the typical underwater acoustic countermeasure equipments such as the wide - band noise jammer target radiation noise simulator echo simulator and the gas bubble are presented
在詳細分析、研究水聲對抗器材有關基本概念、基本工作原理及對抗過程的基礎上，歸納、總結了噪聲干擾器、目標輻射噪聲模擬器、主動回波模擬器及氣幕彈等當前典型水聲對抗器材的數學模型。 -
The use of interferometer to detect and analyze laser radiation is well known, but when the intense ratio of the laser radiation to the background natural light radiation is too small, the laser radiation cannot be detected. a novel more sensitive method for detect of wideband weak incident laser in strong background noise is introduced in this paper. the optical unit uses two wedge interferometers and two line array detectors. the incoming light radiation is divided into two beams and through the interferometers
在被動激光偵察告警中，對微弱脈沖激光信號的探測是一個難點。當探測距離相當遠或視場內接收的背景光輻射很強時，脈沖激光信號到達探測器的能量很小，會淹沒在強大的背景光信號中而探測不到。本論文提出了一種探測微弱脈沖激光信號的方法，可對強烈背景光中的激光威脅信號進行探測和告警，並給出其波長參數。 -
Low radiation noise based on its toroidal construction.
環形結構輻射噪音低 -
In light of the generation mechanism, the surface radiation noise can be further divided into the combustion noise and the mechanical noise
按照產生的機理，柴油機表面輻射噪聲又可以分為燃燒噪聲和機械噪聲。 -
The flow - noise in seawater pipeline has more influence on working environment and warship personnel health, and radiation noise from the pipeline exits also seriously effects on the hiding ability of warships
海水管路系統的流噪聲對工作環境及艦船人員身體健康有較大的影響，並且通過管口向艇外輻射噪聲，嚴重地影響艦船的隱蔽性。 -
The control over the surface radiation noise ( combustion noise and mechanic noise ) is restricted by factors like the engine performance. technically such a control is quite difficult to manage and the noise reduction effect is not so encouraging
發動機表面輻射噪聲（燃燒噪聲和機械噪聲）的控制要受到發動機性能方面的種種限制，從技術角度講難度很大，且降噪量有限。 -
An underwater sound intensity measurement system and its application to radiation noise measurement of underwater structure in the near - field
水下聲強測量分析系統及其在近場測量中的應用 -
Radiation - noise - limited system
輻射噪聲限制系統 -
The dgeu noise is made up of multiple sound sources. in light of the noise radiation mode, it can be classified into the aerodynamic noise and the surface radiation noise
柴油機噪聲是一個由多種聲源構成的復雜聲源，按照噪聲輻射方式，柴油機噪聲可以分為空氣動力噪聲和表面輻射噪聲。 -
It has been proved that some structural adjustments may somehow cut down on the surface radiation noise of the engine, thus bringing down the overall noise level. basically it means to increase the structural rigidity and the damping so as to reduce the structural surface response under the same exciting force
實踐表明，在結構上採取措施可以一定幅度地降低發動機的表面輻射噪聲，從而降低整機噪聲。控制的基本措施是增加結構剛度和阻尼，使得在同樣的激振力作用下減少結構表面響應。 -
The sound intensity measurement is carried out for the exterior radiation noise of an automobile and by means of spectrum and correlation analysis of noise signal, an investigation into the application of sound intensity measurement to vehicle noise control is presented. for the main noise sources of automobile - noise of the engines made a distinguish analysis technology and various noise control measures. it is beneficial reference to reduce noise of engine
本文依據聲強測量的原理，以汽車噪聲源的分析為應用對象；通過對汽車的車外輻射噪聲進行了聲強測試並對噪聲信號進行頻譜分析和相干分析，研究了聲強測量系統在汽車噪聲控制中的應用問題；論述了汽車發動機噪聲的鑒別分析技術和各種控制措施，為發動機噪聲的降噪工作提供參考。 -
Secondly, research development of noise control is analyzed and theory research of noise radiation, noise measurement and noise resource diagnosis, cae, research of numerical value and visual analysis, noise active control are described in this paper
接著，分析噪聲控制工程的研究進展，提出噪聲輻射理論研究，噪聲測試與聲源診斷， cae 、數值化與可視化研究，噪聲的主動控制技術。 -
Radiation noise analysis using the results of power flow finite element method
功率流有限元法結果分析輻射噪聲 -
Meanwhile, an effective control can also be achieved by decreasing the surface area of the radiation noise
與此同時，減少輻射噪聲的表面面積，也是控制輻射噪聲的有效措施。 -
After lab test and onset installation test, it has been proved that this technology can effectively reduce the wheel - rail radiation noise
經過實驗室試驗和現場安裝試驗，證明該技術可有效降低輪軌輻射噪聲。 -
As one source of environmental pollution, diesel noise comprises multiple sound sources, which are mainly the aerodynamic noise and the surface radiation noise
柴油機組噪聲是一種環境污染源。它由多種聲源構成的，主要為空氣動力噪聲和表面輻射噪聲。
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