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On the damping of ultrasonic transducers' components

机译：关于超声换能器组件的阻尼

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摘要

Ultrasonic transducers are nowadays widely used in a variety of applications ranging from medical devices, actuators and receivers used in engineering, measuring instruments and equipment, to devices used in agriculture and archeology. In all applications, transducer's vibration behavior is under influence of material, shape, size and damping of components. To have a good reproducibility, the material properties of components must be known. Under certain frequency and by having material properties including damping coefficient of ultrasonic transducers' components, it is well proved that the transducer's vibration behaviors can be predicted. In this paper, frequency response method has been developed on the basis of modal analysis for calculation of material damping ratio of components over the range of frequency. It should be noted that metallic materials have a lower damping loss compared with non-metallic (ceramic or polymer) materials. Yet this low damping may have effect on the vibration performance of transducer. Damping curves of stainless steel 304 and aluminum 7075-T6, used normally for transducers, have been plotted over the range of frequency and this helps in determination of exact damping value of the components in any vibration frequency.
机译：如今，超声换能器广泛用于各种应用，从医疗设备，工程中使用的执行器和接收器，测量仪器和设备，到农业和考古学中使用的设备。在所有应用中，传感器的振动行为都受到材料，形状，尺寸和组件阻尼的影响。为了具有良好的再现性，必须知道组件的材料属性。在一定频率下，通过具有包括超声换能器组件的阻尼系数在内的材料特性，可以很好地证明换能器的振动行为是可以预测的。本文在模态分析的基础上开发了频率响应方法，用于计算频率范围内构件的材料阻尼比。应该注意的是，与非金属（陶瓷或聚合物）材料相比，金属材料具有更低的阻尼损耗。然而，这种低阻尼可能会影响换能器的振动性能。通常在换能器上绘制了不锈钢304和铝制7075-T6的阻尼曲线，这些曲线通常在频率范围内绘制，这有助于确定组件在任何振动频率下的精确阻尼值。

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