Parametric Vibration of Submerged Fl(精选3篇)

Parametric Vibration of Submerged Fl 篇一

Parametric Vibration of Submerged Fl: An Introduction to the Phenomenon

Introduction

Parametric vibration is a fascinating phenomenon that occurs when the properties of a system change periodically in time. This phenomenon is particularly interesting when it occurs in submerged fluid systems, as it can have significant implications for various engineering applications. In this article, we will explore the basic concepts of parametric vibration in submerged fluid systems and discuss its potential applications.

Understanding Parametric Vibration

Parametric vibration occurs when the properties of a system, such as its natural frequency or damping coefficient, vary with time. This variation can be periodic, with a specific frequency and amplitude. When these variations coincide with the natural frequency of the system, resonance can occur, leading to amplified vibrations.

In submerged fluid systems, the presence of a fluid medium adds an additional complexity to the phenomenon of parametric vibration. The fluid can interact with the vibrating system, causing changes in its properties and influencing the overall behavior of the system. This interaction can lead to interesting and sometimes unexpected results.

Applications of Parametric Vibration in Submerged Fluid Systems

Parametric vibration in submerged fluid systems has a wide range of applications across various fields of engineering. Some of the notable applications include:

1. Energy harvesting: Parametric vibration can be harnessed to harvest energy from the surrounding fluid. By tuning the properties of the vibrating system to the natural frequency of the fluid, the energy of the fluid motion can be efficiently converted into electrical or mechanical energy.

2. Underwater vehicle propulsion: Parametric vibration can be used to enhance the propulsion of underwater vehicles. By introducing controlled variations in the system properties, the vehicle can generate additional thrust, increasing its speed and maneuverability.

3. Structural health monitoring: Parametric vibration can be utilized for structural health monitoring of submerged structures, such as offshore platforms or underwater pipelines. By monitoring the changes in the system properties, it is possible to detect and assess any potential damage or degradation in real-time.

Challenges and Future Directions

While parametric vibration in submerged fluid systems holds great potential for various applications, there are still several challenges that need to be addressed. The complex fluid-structure interaction, the need for efficient control strategies, and the development of reliable sensing techniques are some of the key challenges in this field.

In the future, further research and development are required to fully understand and exploit the potential of parametric vibration in submerged fluid systems. This includes investigating new materials, optimizing system designs, and developing advanced control algorithms. By doing so, we can unlock the full potential of this phenomenon and create innovative solutions for various engineering challenges.

Conclusion

Parametric vibration in submerged fluid systems is a fascinating phenomenon with wide-ranging applications in various fields of engineering. By understanding the basic concepts and exploring its potential applications, we can harness the power of this phenomenon to create innovative solutions for energy harvesting, underwater vehicle propulsion, and structural health monitoring. However, further research and development are needed to overcome the challenges and fully exploit the potential of parametric vibration in submerged fluid systems.

Parametric Vibration of Submerged Fl 篇三

Parametric Vibration of Submerged Floating Tunnel Tether Under Random Excitation

Abstract：For the study of the parametric vibration response of submerged floating tunnel tether under random excitation, a n

onlinear random parametric vibration equation of coupled tether and tube of submerged floating tunnel is set up. Subsequently, vibration response of tether in the tether-tube system is analyzed by Monte Carlo method. It may be concluded that when the tube is subjected to zero-mean Gaussian white noise random excitation, the displacement and velocity root mean square responses of tether reach the peak if the circular frequency of tube doubles that of tether; the displacernent and velocity root mean square responses of tether increase as the random excitation root mean square increases; owing to the damping force of water, the displacement and velocity root mean square responses of tether decrease rapidly compared with tether in air; increasing the damping of the tether or tube reduces the displacement and velocity root mean square responses of tether; the large-amplitude vibration of tether may be avoided by locating dampers on the tether or tube. 作者： Author： SUN Sheng-nanSU Zhi-bin 作者单位： School of Architecture and Civil Engineering, Liaocheng University, Liaocheng 252059, China 期 刊： 中国海洋工程(英文版) ISTICEISCI Journal： CHINA OCEAN ENGINEERING 年，卷(期)： 2011,25(2) 分类号： P756.2 Keywords： ocean engineering submerged floating tunnel tether parametric vibration random excitation 机标分类号： TU3 TH1 机标关键词： parametric vibrationvibration responsevelocityrootGaussian white noisedamping forceMonte Carlostudyreachsetair 基金项目： This work is financially supported by the Promotive Research Fund for Excellent Young and Middle-aged Scientists of Shandong Province