REG: Ultrasonic Resonance Spectrometer

REG：超声波共振光谱仪

• 批准号: 9112249
• 负责人: Paul Heyliger
• 金额: $ 3万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-08-01 至 1993-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9112249&HistoricalAwards=false
• 关键词: REG; Ultrasonic; Resonance; Spectrometer

Necessary components will be purchased to construct an ultrasonic resonance spectrometer. The equipment will be used for several research projects involving the evaluation of the mechanical properties of materials, particularly the elastic constants. The intended use of the apparatus is to measure the resonant frequencies of free vibration of materials of very small size that have been manufactured or already exist in the shape of a parallelepiped, a sphere, or a cylinder. Using numerical techniques that are currently being developed, approximations to these frequencies are also evaluated using the theory of elasticity. By comparing the measured frequencies with the calculated frequencies and minimizing the difference between these values, optimal estimates can be obtained for the elastic constants. The measurements system will allow a wealth of material studies to be completed and can be used to study any solid: metal, ceramic, semiconductor, polymer, composite, and so on. Other uses include the effects of temperature and pressure on the elastic constants, general structural vibration studies, and internal friction measurements. The system possesses both scientific and practical potentials, and will provide the opportunity to establish a new standard method for measuring material properties.

将购买必要的组件来构建超声波 共振分光计 该设备将用于几个 研究项目涉及的机械评价 材料的性质，特别是弹性常数。 该仪器的预期用途是测量谐振频率。 非常小尺寸材料的自由振动频率， 已经被制造或已经存在的形状， 平行六面体、球体或圆柱体。 利用数值 目前正在开发的技术， 这些频率也使用以下理论进行评估： 弹性 通过将测量的频率与 计算频率并最小化这些频率之间的差异 值，可以获得弹性的最佳估计 constants. 测量系统将允许大量的材料研究， 可以用来研究任何固体：金属，陶瓷， 半导体、聚合物、复合材料等。其他用途包括 温度和压力对弹性常数的影响， 一般结构振动研究和内部摩擦 测量. 该体系具有科学性和实用性 潜力，并将提供建立新的 测量材料性能的标准方法。