• 声振分析能从根本上弄清结构产生噪声的根源,从而有针对性地对噪声进行控制。

    Sound and vibration analysis can fully identify the source of noise, thus controlling the noise accordingly.

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  • 试验分析结果表明,声振技术在惯性仪表中的应用有着十分广阔前景。

    Test analysis results have shown a promising potential of acoustic-vibration technique.

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  • 目的探讨声振刺激试验(VAST)在产时估价胎儿宫内健康情况的作用。

    Objective to assess the value of vibratory acoustic stimulation test (VAST) in evaluating fetal well-being in labor.

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  • 通过声模拟实验和声振分析计算以及振动测量,研究了床头箱体在整机噪声中的作用。

    Thereafter, with the sound simulation and the vibration measurements, the effects of the headstock on the noise of the lathe are studied.

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  • 首先,对现阶段常用于声振信号分析领域研究的各种时频分析方法的优缺点进行了分析和比较。

    First, Discuss the advantage and disadvantage of some methods of time-frequency analysis usually used in the field of signal processing on sound and vibration.

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  • 从壳体基本运动方程出发,导出了弹性介质中的充液管道在轴对称运动下声振耦合系统的频散方程。

    The dispersion equation of structure acoustic coupling system for fluid filled pipes surrounded by elastic media under axisymmetric motion was derived from shell dynamic equation.

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  • 依据激励方式的不同,本文分别从敲击检测以及声阻检测方法两个方面对声振检测方法进行了介绍。

    In this paper, the acoustic impact testing method has been presented with two different excitation methods: the tap testing method and the acoustic impedance testing method.

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  • 根据相似理论设计制造了大型圆盘锯机模型,通过实验对模型锯片的声振特性进行了系统深入的研究。

    Based on analogous Theory, the large sized disk saw machine model is manufactured. The sound and vibration properties of model saw blades are studied systematically and deeply via experiments.

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  • 燃烧不稳定不仅影响航空发动机的工作稳定性,而且还是造成燃烧室火焰筒薄壁结构声振耦合疲劳破坏的重要原因。

    Combustion instability not only affects the stability of the aero-engine work, but also caused the combustion chamber flame tube thin-walled structure acoustic-vibration coupled fatigue.

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  • 该文以一拖拉机驾驶室模型为研究对象,建立了其声振耦合的有限元分析模型,计算了该驾驶室模型的声学模态和声振耦合模态。

    In this paper, a structural-acoustic model of a model tractor cab for finite element analysis was established, and the acoustic modal and the coupled structural-acoustic modal were analyzed.

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  • 国外高档客车均采用浮筑地板,浮筑地板具有良好的减振、隔声性能。

    High-grade passenger car abroad adopts floating floor with high performance of vibration absorption and sound insulation.

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  • 降噪材料按降噪机理可分为阻尼减振材料、吸声材料和隔声材料。

    According to the function mechanisms, polymeric noise reduction composites were classified as vibration damping, sound absorption and sound insulation materials.

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  • 声矢量传感器是一种新型传感器,它可以空间共点,同时测量声场中的声压和振速信息。

    The acoustic vector hydrophone is a new type sensor, which can simultaneously measure the pressure and particle velocity of the same point in acoustic field.

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  • 热声机械作为一种新型的能量转化装置,讨论其起振温差对于利用低品位能源具有非常重要的意义。

    The onset temperature difference of thermoacoustic Stirling prime movers is a very important parameter for utilizing low quality heat energy.

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  • 列出常见和特殊的声、电磁噪声来源,严重的振颤,腐蚀源以及所有有可能影响正常测量的干扰因素。

    List normal and special sources of acoustic or electromagnetic noise, serious vibration, sources of corrosion, and any other significant interfering parameter that might prevent successful measuring.

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  • 研究了无限板上受点激励时阻振质量对结构声传递的阻抑,采用基于能量观点的隔振度来定义阻振质量的阻抑作用。

    Vibration isolation mass attenuating transmission of the plate flexural wave is analyzed with the force excitation applied on an infinite plate.

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  • 此理论将声场表示成各种共振再辐射模态的叠加,从振动的角度揭示声-振耦合机理。

    The theories express the sound fields by a superposition of various resonance reradiation modes and reveal the vibro-acoustic coupling mechanism in viewpoint of vibration.

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  • 在二维绝缘铁磁系统基础上建立了一个磁振子-声子相互作用模型。

    A magnon-phonon interaction model was built in two-dimensional triangular insulating ferromagnet.

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  • 在二维正方绝缘铁磁系统基础上建立了一个磁振子声子相互作用模型。

    A magnon-phonon interaction model is applied to two - dimensional insulating ferromagnets.

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  • 根据吸声、隔声和阻尼减振原理,对某型双层客车后部结构提出了改进措施,使其车内噪声达到了国家规定。

    An improved back structure is proposed according to the principle of sound absorption. sound insulation and damping vibration. It can lower inner noise so as to meet the state standard.

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  • 比较了纵向声子与横向声子对磁振子衰减的影响,也讨论了各项参数的变化对磁振子衰减的影响。

    The influences of longitudinal phonon and transverse phonon on the magnon damping are compared, and the influences of the parameters are also illustrated.

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  • 比较了纵向声子与横向声子对磁振子衰减的影响,也讨论了各项参数的变化对磁振子衰减的影响。

    The influences of longitudinal phonon and transverse phonon on the magnon damping are compared, and the influences of the parameters are also illustrated.

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