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相关概念视频

Propagation of Waves01:07

Propagation of Waves

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When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
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Standing Waves in a Cavity01:28

Standing Waves in a Cavity

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A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
936
Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

200
Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
200
Fluid Pressure over Curved Plate of Constant Width01:12

Fluid Pressure over Curved Plate of Constant Width

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When a curved plate of constant width is submerged in a liquid, the pressure acting normal to the plate varies continuously both in magnitude and direction. Calculating the magnitude and location of the resultant force at a point is often challenging for such cases. One of the methods to determine the resultant force and its location involves separately calculating the horizontal and vertical components of the resultant force. This complex calculation can be simplified by representing the...
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Fluid Pressure over Flat Plate of Constant Width01:05

Fluid Pressure over Flat Plate of Constant Width

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When a body is submerged in water, it experiences fluid pressure acting normal on its surface and distributed over its area. For better design structures, it is crucial to determine the magnitude and location of the resultant force acting on the surface. In the case of a rectangular plate of constant width submerged in water, the pressure increases with depth, resulting in a linearly varying trapezoidal pressure distribution from the upper to the lower edge of the plate.
The resultant force...
2.1K
Fluid Pressure over Flat Plate of Variable Width01:02

Fluid Pressure over Flat Plate of Variable Width

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When a flat plate is submerged in a fluid, the fluid exerts pressure on the plate. This pressure can lead to many different phenomena, including drag and buoyancy. To understand the behavior of the fluid over a flat plate of variable width, it is essential to analyze the distribution of the pressure exerted.
The pressure distribution on the plate can be calculated by determining the force that acts on a differential area strip of the plate. Thus, the magnitude of the force is equal to the...
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相关实验视频

Updated: Jul 11, 2025

Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System
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Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System

Published on: August 7, 2018

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在具有非线性弹接口的双层板中引导波传播.

Junzhen Wang1, Jianmin Qu1

  • 1Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA.

Ultrasonics
|November 17, 2023
PubMed
概括

双层板中的非线性弹接口可以产生共振引导波. 这种混合初级波的现象为非破坏性评估物质纽带提供了潜力.

科学领域:

  • 固体力学 固体力学是什么
  • 波浪传播 波浪传播
  • 材料科学 材料科学 材料科学

背景情况:

  • 层层结构中的引导波对于结构健康监测至关重要.
  • 接口属性显著影响波浪行为.
  • 材料中的非线性效应可以导致独特的波浪现象.

研究的目的:

  • 从理论上研究导向波在具有非线性接口的双层板上的传播.
  • 为了探索由于接口非线性而导致的共振引导波的产生.
  • 为基于非线性引导波的非破坏性评估奠定基础.

主要方法:

  • 开发用于双层板的非线性弹接口模型.
  • 应用修改后的正常模式扩展方法来解决引导波场的问题.
  • 波混合和共振条件的分析.

主要成果:

  • 接口的非线性会产生共振引导波.
  • 波混合产生共振波的总和或差异频率.
  • 共振波幅与接口合规性相关.
  • 对于相同频率的初级波来说,第二次波生成是可能的.
关键词:
非破坏性的评估.非线性引导波是一种非线性引导波.正常模式扩展正常模式扩展第二代波器的第二代波器.波浪混合 波浪混合

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Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
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Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

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相关实验视频

Last Updated: Jul 11, 2025

Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System
10:52

Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System

Published on: August 7, 2018

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Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
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Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

Published on: August 21, 2018

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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
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Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor

Published on: August 30, 2012

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结论:

  • 非线性弹接口模型准确地预测了共振引导波的产生.
  • 了解这些非线性现象是开发先进的非破坏性评估技术的关键.
  • 这项研究为评估分层材料中的结合完整性提供了理论支持.