acoustic radiation 中文意思是什麼
acoustic radiation
解釋
聲輻射-
A two - cylinder model for saal incorporating bem simulations is proposed, which introduces a factor concerning the geometric parameters of the levitator into the expressions for the time - averaged potential u, acoustic radiation force f, and restoring force constant ki, respectively, and builds up the relationship between the levitation capabilities and the geometric parameters of a single - axis acoustic levitator
建立了單軸式聲懸浮的優化設計理論模型，採用邊界元方法求解入射聲場，在表徵聲懸浮性能的時間平均勢u 、聲輻射力f _ i和回復力常數_ i的表達式中分別引入了一個涉及懸浮器幾何參數的因子。 -
The input impedance of the interdigital saw transducer is measured by the equivalent circuit method. the experimental results show that the synchronized frequency of 9. 586 mhz, the acoustic radiation resistance of 44. 6 and the static electrode capacity of 194pf all agree with those design values
用自行設計的等效電路測量方案，測量了表面彈性波馬達換能器的輸入阻抗，實驗結果顯示表面彈性波換能器的共振頻率為9 . 586mhz ，輻射聲電阻為44 . 6 ，叉指電極靜電容為194pf 。 -
In this dissertation, the numerical computation for the acoustic radiation problem ( arp ) is studied deeply and systematically in the theory, method and the application technique, based on analyzing the situation of the home and abroad on the numerical computation for the acoustic radiation problem. the calculation formulas of the boundary element method ( bem ) for the exterior acoustic radiation problem in the full - space and half - space are deduced, based on the wave propagation theorem ; the arising of the non - unique solutions, which is associated with the application of the boundary integral equation ( bie ) in acoustic radiation problem, is analyzed and proofed ; the improved combined helmholtz integral equation formulation ( ichief ) is presented to overcome the non - uniqueness problem more effectively and reliably ; the determination of the singular integral coefficients on various occasions is analyzed ; the properties and treatments of the singular integrals with different orders axe studied ; the computation program of the cubic spline ichief is developed and its ability to overcome the non - uniqueness problem and feasibility to discrete the surface coarsely with the sufficient calculation precision are examined through examples
第二章在聲波動理論基礎上，詳細地推導出對應于無限域和半無限域的外部振動聲輻射問題的邊界積分方程計算公式；根據fredholm積分理論，對利用邊界積分方程計算振動聲輻射問題過程中解的非唯一性的產生進行了分析和證明；改進了chief法以提高其克服解的非唯一性的有效性和可靠性；對不同條件下奇性系數的計算、強奇性積分的收斂性及其在變量替換時與普通積分的差異性、不同階奇性積分的計算、數值求積分等進行了研究；開發了三次樣條改進chief法計算軟體，並通過算例考核了該方法在特徵波數處克服解的非唯一性的有效性和在保證計算精度的前提下實現剖分粗化以提高計算效率的可行性。 -
On using wavelets to solve problem of acoustic radiation and scattering from axisymmetric body with arbitrary boundary conditions
子結構剛度對巨型框架減振結構體系的動態特性影響 -
Analysis and calculation of acoustic radiation of a beam - like flexible components in high - speed mechanisms
高速機構梁類彈性構件聲輻射分析與計算 -
It is a challenge project for us to predict the acoustic radiation of high - speed mechanism, and try to depress it effectively, which is also one of the key problems to solve in the design of mechanical products, aeronautics & astronautics products, and martial products
對高速機構進行準確的噪聲輻射性能分析，有效的抑制機構噪聲輻射，是我們必須面對的一個重要研究課題，這也是機械、航空航天及軍事工業等領域設計良好產品所必須解決的關鍵問題之一。 -
Various high - speed flexible mechanisms are used popularly in modern industries. due to their small damp, and the coupling of their large overall displacement and local distortion, they are ready to vibrate under exterior disturbance, which usually leads to intense acoustic radiation, then deteriorate the circumference
工業領域廣泛使用著以彈性連桿機構為主體的各種高速機構，這些機構由於阻尼小、整體大位移和局部彈性變形之間存在剛彈耦合，所以極容易受到外界的干擾發生振動並產生強烈的噪聲輻射，對周邊環境造成噪聲污染。 -
It is a challenge project for us to predict the acoustic radiation of high - speed mechanism, and try to depress it effectively. which is also one of the key problems to solve in the design of mechanical products, aeronautics and astronautics products, and martial products
如何對高速機構進行準確的噪聲輻射預報分析，改善機構的動態特性，有效的抑制機構彈性振動引起的噪聲輻射，是我們必須面對的一個重要研究課題，這是在機械、航空航天及軍事工業等領域設計良好產品所必須解決的關鍵問題之一。 -
Based on the acoustic radiation mode analysis, the transfer matrix relating the pressure at every field point to normal component of surface velocity is formed
摘要基於聲輻射模態分析，建立了外部場壓和結構表面振動速度之間關系的傳遞矩陣。 -
Modal analysis of k5206nm compressor block is done, and the acoustic radiation modal parameters are calculated, then the acoustic radiation properties of the compressor block can be obtained, which provide the basis for the low noise compressor block design
對k5206nm壓縮機機體進行了模態分析和聲輻射模態參數計算，獲得了機體的聲輻射特性，從而為機體的低噪聲設計提供了依據。 -
Using finite element and boundary element method, a modal analysis model of complex structural acoustic radiation in light fluid is proposed for computing modal acoustic radiation frequency, farfield sound pressure, modal radiated acoustic power and acoustic radiation efficiency
摘要採用有限元和邊界元方法建立了輕流體介質中復雜結構振動聲輻射的模態分析模型，可計算結構的聲輻射模態頻率、模態場點聲壓、模態輻射聲功率和聲輻射效率等聲場特性參數。 -
In this paper, a study has been made of analyzing the acoustics and vibration characters of the plate & shell and stiffened plate & shell structures with fea ( finite element analysis ) and basic theories of structural vibration and acoustic radiation, which, to some extent, helps the nonprofessional people understand the acoustical characters of these structures through acoustical means
本文利用有限元方法，結合結構振動與聲輻射基本原理，對板殼、加筋板殼結構的聲?振特性進行了分析，利用信號處理技術實現結構聲?振特性的可聽化模擬。在一定程度上，使非專業人士也可以通過聲學手段了解結構的聲學特性。 -
With the wave number analysis of the structural vibration of flexible mechanism, the relationship between structural vibration and structural acoustic radiation are studied
通過對彈性機構振動波數譜分析，得出了機構振動與聲輻射之間的關系。 -
Research on vibration and acoustic radiation of submarine structure
艦艇結構水下振動和聲輻射特性研究 -
The acoustic radiation resistance matrix is combined with the velocity vector on a vibration surface to predict the total sound power radiated from the structure
摘要利用聲輻射阻力矩陣和振動面上的速度矢量預報了結構聲輻射的總功率。 -
Acoustic radiation resistance
聲輻射阻尼 -
The low frequency noise of the ring - stiffened cylinder with double shell is depressed by increasing structure stiffness, the numerical simulation is adopted to evaluate the acoustics performance, find that the vibration and acoustic radiation of the structure could be depressed by increasing the structure stiffness within the discontinuous range of the low frequency
摘要通過增大雙層加肋圓柱殼的剛度降低低頻噪聲，使用數值模擬技術，評價結構的聲學性能，發現增大雙層加肋圓柱殼結構剛度，可在低頻段有限頻率范圍降低結構的振動與聲輻射。 -
Acoustic radiation measurement
聲輻射測量 -
Sysnoise - based research on the characteristics of coupled vibration and acoustic radiation of a structural template
的建築模板耦合振動及聲輻射特性研究 -
A rectangular box simulating the axial box of the lathe tool is manufactured ; experimental measurements of the surface vibration on the rectangular box and the acoustic field around the rectangular box corresponding to firstly a series of a homogeneous excitation and secondly two iii independent white noise excitations are taken in a semi - anechoic chamber. taking the vibratory properties as input, the properties of the sound field are calculated by the evsbpm and the sdsbpm respectively. the effectiveness and reliability of the evsbpm and the sdsbpm for the calculation of acoustic radiation problem is further verified from the comparison of the calculated results and measured ones
第五章設計加工了一模擬機床主軸箱的長方箱體，在半消聲室環境下，分別對其在單點處一系列簡諧激勵作用下和兩點處的獨立白噪聲激勵作用下的振動及其輻射聲場進行了實驗研究和分析計算，通過計算結果和實測值之間的比較，進一步驗證了改進體積源邊界合肥工業大學搏士學位論文點方法和統計分佈源邊界點方法計算振動聲輻射問題的有效性和可靠性。
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