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相关概念视频

Concept of Resonance and its Characteristics01:19

Concept of Resonance and its Characteristics

5.0K
If a driven oscillator needs to resonate at a specific frequency, then very light damping is required. An example of light damping includes playing piano strings and many other musical instruments. Conversely, to achieve small-amplitude oscillations as in a car's suspension system, heavy damping is required. Heavy damping reduces the amplitude, but the tradeoff is that the system responds at more frequencies. Speed bumps and gravel roads prove that even a car's suspension system is not...
5.0K
Damped Oscillations01:07

Damped Oscillations

5.7K
In the real world, oscillations seldom follow true simple harmonic motion. A system that continues its motion indefinitely without losing its amplitude is termed undamped. However, friction of some sort usually dampens the motion, so it fades away or needs more force to continue. For example, a guitar string stops oscillating a few seconds after being plucked. Similarly, one must continually push a swing to keep a child swinging on a playground.
Although friction and other non-conservative...
5.7K
Forced Oscillations01:06

Forced Oscillations

6.5K
When an oscillator is forced with a periodic driving force, the motion may seem chaotic. The motions of such oscillators are known as transients. After the transients die out, the oscillator reaches a steady state, where the motion is periodic, and the displacement is determined.
6.5K
Types of Damping01:20

Types of Damping

6.4K
If the amount of damping in a system is gradually increased, the period and frequency start to become affected because damping opposes, and hence slows, the back and forth motion (the net force is smaller in both directions). If there is a very large amount of damping, the system does not even oscillate; instead, it slowly moves toward equilibrium. In brief, an overdamped system moves slowly towards equilibrium, whereas an underdamped system moves quickly to equilibrium but will oscillate about...
6.4K
Design Example: Underdamped Parallel RLC Circuit01:17

Design Example: Underdamped Parallel RLC Circuit

287
Consider designing an oscillator circuit, a crucial component in various electronic devices and systems. The objective is to create an oscillator circuit with specific characteristics: a damped natural frequency of 4 kHz and a damping factor of 4 radians per second. To accomplish this, a parallel RLC circuit is employed, known for its ability to sustain oscillations at a resonant frequency. In this case, the damping factor is pivotal in achieving the desired performance.
Starting with a fixed...
287
Sound Waves: Resonance01:14

Sound Waves: Resonance

2.6K
Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
2.6K

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Fabrication and Testing of Microfluidic Optomechanical Oscillators
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Fabrication and Testing of Microfluidic Optomechanical Oscillators

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在合的Duffing振荡器和非线性正常模式中的多重共振.

Rosty B Martinez Duque1, Carlos E Vásquez Romero2

  • 1Physics Department, Oklahoma State University, Stillwater, Oklahoma 74075, USA.

Physical review. E
|May 17, 2024
PubMed
概括

这项研究研究了合的Duffing振荡器中的共振. 研究人员在双振荡器系统中发现了歇斯底里不稳定的区域和非线性正常模式,在特定的驾驶条件下揭示了复杂的动态.

科学领域:

  • 非线性动力学是一种非线性动力学.
  • 振荡系统 振荡系统
  • 合振荡器 物理 物理

背景情况:

  • 达芬振荡器是非线性动力学的基本模型.
  • 了解合系统中的共振现象对于各种物理应用至关重要.
  • 以前的研究往往侧重于单个振荡器或更简单的合方案.

研究的目的:

  • 通过分析和数值研究 N 个线性合的压缩的 Duffing 振荡器链中的共振.
  • 为描述多振荡器系统中的共振曲线开发一个一般的递归方案.
  • 为了分析N=2振荡器在高驱动幅度和度下的具体情况.

主要方法:

  • 分析计算动态系统的固定点.
  • 使用第四级多变量朗格-库塔法进行数值模拟.
  • 开发一个关于振荡器振幅和驱动频率的一般递归方案.

主要成果:

  • 建立了一个一般的递归方案来描述N合的Duffing振荡器的共振曲线.
  • 在特定条件下,在两个振荡器系统 (N=2) 的共振曲线中确定了歇斯底里不稳定的区域.
  • 在不稳定的驾驶频率模式中观察到表现为准周期性振荡的非线性正常模式.

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Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
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Fabrication and Testing of Microfluidic Optomechanical Oscillators
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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

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Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
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Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators

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结论:

  • 这项研究为分析合的杜芬振荡器链中的共振提供了一个全面的框架.
  • 这些发现突出了这些系统中复杂的非线性行为的存在,包括歇斯底里和准周期性.
  • 已识别的非线性正常模式为合振荡系统的能量转移和稳定性提供了洞察力.