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- It is important in ASAC system based on acoustic radiation modes to obtain adjoint coefficient of the radiation modes. 基于声辐射模态理论进行ASAC控制系统中的一个重要内容就是获得声辐射模态伴随系数。
- It is important in ASAC based on acoustic radiation modes to obtain adjoint coefficients of the radiation modes. 声辐射模态伴随系数的获取是基于声辐射模态理论进行 ASAC控制中的重要环节。
- 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. 摘要利用声辐射阻力矩阵和振动面上的速度矢量预报了结构声辐射的总功率。
- A mathematical model about acoustic radiation from structure submerged in unbounded sound field was developed using boundary element method. 摘要建立了无界声场中结构体声辐射的边界元数学模型。
- The examples actualize analysis of bilateral coupled vibration and acoustic radiation by using transitivity of CAE software results. 还利用CAE软件结果的可移植性，考虑了半封闭加筋圆柱结构内外分布不同介质时，实现了双边耦合振动声辐射分析求解。
- Boundary element methods are used to calculate acoustic radiation of the piping system, which provides the theoretical direction for decr... 计算分析结果表明,本文所建立的振动和声辐射模型及算法有效,有助于该类问题的解决。
- The numerical calculation of underwater structure s acoustic radiated field has been carried out with the FEM and I-FEM. 结果表明,提出的在时域内进行水下结构声辐射的计算是切实可行的,为水下结构声辐射仿真研究提供了新的方法。
- 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. 摘要基于声辐射模态分析，建立了外部场压和结构表面振动速度之间关系的传递矩阵。
- Then acoustic radiative pressure level is computed with a 3-D FE acoustic-field model and bounary conditions imported from the result of vibration response by infinite FEM. 建立齿轮箱外声场二维有限元模型，导入齿轮箱振动响应结果作为声学边界条件，并采用无限有限元法计算了辐射声压级。
- Based on the acoustic transfer vector concept(ATV),the application approach to structural acoustic radiated prediction using the ATV technology for I.C.engine was studied. 基于声传递向量(ATV)的概念,研究探讨了ATV技术在内燃机结构辐射噪声仿真预测上的应用方法和途径。
- Vibration transmission and underwater acoustic radiation characteristics experiment of floating raft system has an important technical application prospect. 对浮筏系统的振动传递及水下声辐射特性进行试验研究有其重要的工程应用前景。
- The transducers in acoustic logging tool are usually cylindrical piezoelectrical transducers and their acoustic radiation and acceptance have preferred directivity. 换能器的声辐射与接收指向性由其形状与尺寸确定。
- A coupled FEM/BEM for solving fluid-structure interaction problem in structure-borne noise propagation and underwater acoustic radiation is present in this paper. 摘要本文以偶合的有限元素／边界元素法，来处理结构噪音传播与水中噪音辐射中弹性结构物与流体之互制问题。
- Based on the acoustic radi-ation modes and the acoustic field distribution modes, the formula for determining the acoustic power radiated from any vibrating surface is derived. The modal analysis in the acoustic radiation problems is enriched. 基于声辐射模态和声场分布模态;推导了计算任意形状振动表面辐射声功率的计算公式;丰富了声辐射问题中的模态分析内容.
- Based on the modal analysis and harmonic respondence analysis of piping system, the acoustic radiation efficiency is calculated;therefore it illustrates the connection between the vibration and noise. 摘要基于管道振动的模态分析及谐响应分析，计算管道的声辐射效率，建立结构体振动与其辐射噪声之间的关系。
- It reviews the developing process of researching acoustic radiation of underwater elastic structures excited by mechanical forces chiefly, and puts forward the trends of the acoustoelasticity briefly. 本文系统综述声弹性研究的基本内容和方法以及重要结果，重点回顾水下弹性结构受机械力激励的外场声辐射研究的发展过程，并简单归纳声弹性研究的发展趋势。
- And draw in the low-frequency range, the impact of internal air over the external shell’s acoustic radiation characteristic is very small.The effect of the internal air can be neglected. 3. 得出在低频范围内，内部空气对壳体外部声场声辐射特性的影响很小，可忽略内部空气的影响。
- Nuclear radiations continue to reach the ground. 核辐射继续不断来到地面。
- Opened the show with an acoustic set. 不用电子乐器开始演出
