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- In this paper, the effect of disc muffler on vibration and sound radiation of worm shell is discussed. 摘要探讨了圆盘型进气消声器对蜗壳振动和声辐射的影响。
- The vibration and sound radiation behaviors of the stem of submarine with rudder and vane are studied. 摘要针对带有舵翼的水下航行器尾部结构模型,研究舵翼对水下航行器尾部的振动及声辐射的影响。
- In order to reduce sound radiation of a structure, the method of Active Structural Acoustic Control (ASAC) was developed in the 1980s. 自八十年代后期以来,为了更为有效地降低结构声辐射,人们提出了主动结构声学控制(ASAC)。
- The singular integration will affect the precision of the result while the Boundary Element Method (BEM) is used in calculating sound radiation. 边界元法应用于计算辐射声场时,由于奇异积分的存在,会影响到计算结果的精度。
- The longitudinal vibration of shaft-line is very important in research of the sound radiated from the hull induced by propeller and shaft-line. 轴系的纵向振动在螺旋桨轴系激励艇体纵向振动声辐射问题分析中具有重要地位。
- The current study is to investigate the relationship between the sound radiation and enclosure vibration by using a laser vibrometer. 利用激光测振仪,测试了箱体振动速度随频率的变化,分析了前几个振动模态的声辐射能力。
- Now with sound radiating equally in each direction, the speakers become invisible, only the sound emanating from them remains. 由于声音向各个方向均匀发散,因此人们只会听到它发出的声音,而很难注意到它的方位。
- In this paper,ring-stiffened cylindrical shells coated with internal deck are experimented on vibration and sound radiation. 对具有内部甲板的环肋柱壳模型进行振动和声辐射试验。
- The numerical results explain that the vibration and sound radiation of stern can be degraded by enforcing the rigidity of rudder or reducing the length of the vane. 结果显示舵翼结构与周围流体的相互作用很大,改变其尺寸和刚度会使得模型的声压发生很大的变化,同时流固耦合现象的存在使得模型在水中的频率明显下降,并且模态阶数的顺序也发生了改变。
- A new theory, named the Resonance Radiation Theory (RRT), is presented in order to deeper understalldingthe mechanisms of sound radiation by submerged structure. 为了深入认识水中结构的声辐射机理,木文提出一个称为共振辐射理论(ResonanceRadiationTheory-RRT)的新理论。
- Lovat G, Loyau T, Thome J P.Prediction of sound radiated by industrial machinery from measured vibration levels: experimentation of the method on an academic case(part 1). 张重超,杨玉致,朱梦周等.;机电设备噪声控制工程学
- In the paper, we have done theoretical studies of sound radiated from the submerged exhaust exit when a diesel engine discharges pulsive exhaust gas into water. 从流体力学的基本方程出发,根据水下排气管口流动状态的观察,推导了柴油机水下排气管口辐射噪声与管口处气体流动参数之间的理论关系。
- A sound mind is inseparable from a sound body. 健全的精神是与健康的身体是不可分割的。
- For improved sound radiation capability, the size and the shape of the enhancer can be modified in various ways, including a frustoconical, parabolic, or bell-shaped enhancer. 为了改善声音的辐射能力,特别是在中频和高频范围内的辐射能力,增强器的尺寸和形状可以有多种变化的形式,包括截锥形、抛物面形或者钟形等。
- When the conductance of sound radiation for IDT is equal to the output conductance for the matching network, the reflection loss and transmission loss can be reduced. 叉指换能器的声辐射电导等于匹配网络输出端电导时,可以减小反射损耗和传输损耗。
- Alarmed at the first sound, we hit the dirt. 第一声警报一响我们就迅速卧倒。
- He has told a story which sound not objective. 他讲了听起来不真实的一个故事。
- I caught a curious sound in the neighboring room. 我听到隔壁房间里有奇怪的响声。
- I was awakened by the sound of church bells. 我被教堂的钟声吵醒。
- The sound of danger gives wings to his flight. 危险的信号加速了他的逃跑。