sound radiation 中文意思是什麼

sound radiation 解釋
聲波輻射
  • sound : adj 1 健全的；強壯的，正常的；完好的，無疵的，沒有腐爛的（船、牙齒等）。2 正確的；正當的，合法的...
  • radiation : n. 1. 發光，射光，放熱，放射，發射。2. 【物理學】輻射；放射物；輻射線[熱、能]；照射（作用）。3. 【動、植】輻射形；【測】射出測量法；【醫學】射線療法。
  1. 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。
  2. Here a number of factors must be taken into consideration, such as the environmental standard of the area where the engine room is located, the fender structure of the engine room as well as the engine type, power level and the cooling air volume, etc. the core of the overall control is the concept of " equal sound insulation ", which means to apply a closed fender structure to isolate the engine unit from outside parts so as to cut the outward sound radiation

    經過多年來與環保部門的合作，對油機房進行消噪聲處理，積累了一些治理經驗，主要是必須根據具體的機房項目來確定相應的控制方案，這其中應考慮機房所在區域的環境標準，機房圍護結構形式及油機機型、功率、冷卻風量等因素。綜合控制的核心是等隔聲概念，即用一封閉的圍護結構將機組與外界隔離開來，減少聲源對外的聲輻射。
  3. Research on the vibration and sound radiation characteristics of stiffened thin plate

    加筋薄板結構振動與聲輻射特性研究
  4. Piezoelectric elements were bonded on the plate as actuators and the input voltage of each actuator was determined by the velocity of its position and volume velocity of the plate was made zero, through which the sound radiation from the plate could be controlled

    在簡支薄板表面粘貼壓電片作為致動器，根據所處位置的速度確定輸入控制電壓，並使平板的體積速度為零，從而達到控制聲輻射的目的。
  5. Results are presented for the sound radiation efficiency and power of the modes of the rectangular baffled plate subjected to simply - supported boundary conditions when the plate is excited by obliquely incident plane wave

    通過計算，得到了嵌在無限大障板中簡支板模型在斜波入射作用下的聲輻射功率和輻射效率。
  6. Numerical simulations were performed and results show that significant attenuation of radiated acoustic power can be obtained, and sound radiation cancellation performance becomes better in low and medium frequencies

    進行了數值模擬，模擬結果表明，應用壓電片能有效地抑制聲吶設備中障板聲輻射，抑制中低頻的聲輻射效果更好。
  7. According to the integral characteristic of pvdf film, two pvdf sensors are designed to measure adjoint coefficient of sound radiation mode in this paper. based on the theory of sound radiation and two - dimensional modal sensors equation, and taking a simply supported plate as example, we measure mode l, mode 2 and mode 3 adjoint coefficient of its sound radiation by the sensors

    本文是在聲輻射模態理論以及兩維分散式壓電傳感器方程的基礎上，利用pvdf獨特的積分特性，以簡支矩形板為例，設計了pvdf壓電薄膜傳感器用於測量簡支板第一、二、三階聲輻射模態伴隨系數。
  8. Matlab procedure is coded to compute the far - field sound pressure levels of the shell excited by radial point force. the influences of modal truncation, stringers, bulkheads and damping on the shell ' s far - field sound pressure are analyzed, laying down the basis for accurate analysis of the sound radiation from fluid - loaded reinforced double cylindrical shells

    本文用matlab編製程序求解了單層殼在徑向激勵力作用下的遠場聲壓級，分析了模態截斷數、縱骨、艙壁板、結構阻尼等因素對殼體遠場輻射聲壓的影響，為準確計算加筋雙層殼在水下振動和聲輻射特性奠定了基礎。
  9. In order to control sound radiation from a baffle in sonar equipment excited by vibration and noise from a ship, the baffle was modeled as a simply supported rectangular thin plate and its radiation characteristics were analytically investigated

    摘要為抑制聲吶設備中障板受艦船振動、噪聲激勵而產生的聲輻射，將障板轉化成簡支薄板模型，分析其在諧波激勵下的聲輻射。
  10. In this paper, the effect of disc muffler on vibration and sound radiation of worm shell is discussed

    摘要探討了圓盤型進氣消聲器對蝸殼振動和聲輻射的影響。
  11. Acoustics - characterization of sources of structure - borne sound with respect to sound radiation from connected structures - measurement of velocity at the contact points of machinery when resiliently mounted

    聲學.關于由連接結構產生噪聲輻射的結構載振動噪聲源的特性描述.機械裝置彈性連接接觸點聲速測量
  12. Research on sound radiation modes

    對聲輻射模態的討論
  13. In addition, the sound radiation from fluid - loaded reinforced double cylindrical shells, periodically connected by slabs, is formulated

    最後，本文還導出了由實肋板連接的加筋雙層殼在水下振動和聲輻射的理論公式。
  14. That is to say, in order to measure the adjoint coefficients of sound radiation modes, we should design the particular shape of error sensor

    因此我們必須設計出誤差傳感器來測量所需控制的聲輻射模態伴隨系數。
  15. The total sound radiation power can be reduced by counteracting the adjoint coefficients of sound radiation modes of the first n radiation modes

    聲輻射模態伴隨系數與對應的輻射聲功率成正比。通過抵消前n階聲輻射模態伴隨系數，就可以使總聲功率降低。
  16. People are interested in the study of asac system based on the radiation modes of radiation structure in recent years, and the system can reduce sound radiation power by controlling radiation modes

    其中以聲輻射模態為基礎的asac系統是近年來的研究熱點。這種方法是通過聲輻射模態的抑制來使結構的輻射聲功率降低。
  17. Radiation modes are dependent on the radiator ' s geometry shape and vibration frequency, but are not relative to the material characteristic and the border condition of the radiator. further more, the radiation efficiency of the radiation modes falls off very rapidly with the increase of modes order at low frequency. the adjoint coefficient of sound radiation modes is proportional to the corresponding sound radiation power

    聲輻射模態由輻射體的幾何形狀和振動頻率決定，與輻射體本身的材料特性以及邊界條件無關；特別是在中低頻率時，聲輻射模態對應的輻射效率隨模態階數的增加而迅速降低。
  18. This paper is aimed to provide a computational method of sound radiation from the pressure and non - pressure hulls of submarines subjected to harmonious point forces. it is significant for reducing vibration and sound radiation of the submarine hull, guiding the optimization design of submarine and enhancing its battle ability

    本文尋求潛艇耐壓和非耐壓船體結構受激振動輻射噪聲的計算方法，分析潛艇結構輻射噪聲的影響因素，對降低艇體振動和輻射的噪聲，以及潛艇結構進行隱身優化設計、提高其戰鬥力具有十分重要的理論指導意義。
  19. The submarine structure is simplified to single or double infinite cylindrical shell stiffened with rings, bulkheads and stringers, focusing on underwater sound radiation from the single shell. the shell motion is described by donnell ' s theory including excitation forces and reactions of rings, bulkheads, stringers and fluid, which leads to the fluid - structure coupling vibration equation. expressing displacements by velocities, applying modal expansion circumferentially and fourier transformation longitudinally result in the shell ' s modal equations of motion

    殼體的運動方程採用較為簡單的donnell理論描述，運動方程中包括了激勵力、加筋結構（環肋、艙壁和縱骨）和流場對殼體的作用力，從而組成流場-結構的耦合振動方程，並進一步將方程中的位移用速度表示，然後沿軸線方向進行fourier變換，將速度和各項荷載沿圓周方向進行模態展開，得到了殼體振動的模態運動方程。
  20. In order to reduce sound radiation of a structure, the method of active structural acoustic control ( asac ) was developed in the 1980s

    自八十年代後期以來，為了更為有效地降低結構聲輻射，人們提出了主動結構聲學控制（ asac ） 。
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