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相关概念视频

Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

224
Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
224
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

406
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
406
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

469
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
469
Equation of Motion: General Plane motion - Problem Solving01:16

Equation of Motion: General Plane motion - Problem Solving

189
Consider a lawn roller with a mass of 100 kg, a radius of 0.2 meters, and a radius of gyration of 0.15 meters. A force of 200 N is applied to this roller, angled at 60 degrees from the horizontal plane. What will be the angular acceleration of the lawn roller?
The friction between the roller and the ground is characterized by two coefficients. The static friction coefficient is 0.15, while the kinetic friction coefficient is 0.1. These values are crucial in understanding the interaction between...
189
Turbulent Flow: Problem Solving01:09

Turbulent Flow: Problem Solving

139
Carbonation is a process used to dissolve carbon dioxide gas in a liquid, commonly used in the production of carbonated beverages. Achieving efficient carbonation requires careful control of temperature, pressure, and flow conditions. By adjusting these parameters, carbonation efficiency can be maximized, producing a higher concentration of CO2 in the liquid.
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures...
139
Newtonian Fluid: Problem Solving01:18

Newtonian Fluid: Problem Solving

231
Newtonian fluids exhibit a constant viscosity, meaning their shear stress and shear strain rate are directly proportional. This property ensures a predictable and stable response to applied forces, maintaining a linear relationship between force and flow. Examples include water, air, and light oils, consistently demonstrating this proportional behavior regardless of external conditions.
A velocity gradient forms within the fluid when a Newtonian fluid is placed between two parallel plates, with...
231

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相关实验视频

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Flapping Soft Fin Deformation Modeling using Planar Laser-Induced Fluorescence Imaging
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波德-加勒金FSI对动运动的分析.

Shigeki Kaneko1, Shinobu Yoshimura1

  • 1Department of Systems Innovations, School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan.

Biomimetics (Basel, Switzerland)
|November 24, 2023
PubMed
概括

这项研究开发了一种减少顺序模型来模拟动的运动,大大缩短了翼微型飞行器设计的计算时间. 高效的模型保持了准确性,使得密集的参数研究成为可能.

科学领域:

  • 计算流体动力学 (CFD) 是一种计算流体动力学.
  • 流体结构相互作用 (FSI)
  • 航空航天工程 航空航天工程

背景情况:

  • 起伏翼微型空中飞行器 (FWMAV) 需要广泛的模拟设计.
  • 当前流体结构相互作用 (FSI) 模拟是计算密集的.
  • 在FWMAV开发中的参数研究中,一个计算高效的模型至关重要.

研究的目的:

  • 为了开发一个减少顺序模型的动运动.
  • 为了实现FWMAV设计的计算效率高的模拟.
  • 为了促进产品优化进行密集的参数研究.

主要方法:

  • 在FSI问题上采用迪里克莱特-纽曼分区代方法.
  • 利用来自高准确度FSI分析的快照数据.
  • 在加勒金投影 (POD-加勒金方法) 下使用正确直角分解 (POD) 开发了低维代用系统.

主要成果:

  • 成功创建了一个减少顺序模型,用于2D动FSI问题.
  • 显著减少了计算时间.
  • 在模拟中保持了所需的精度,使用不同的翻拍频率和振幅.
关键词:
拍拍的动作 拍拍的动作流体结构的相互作用.分区式代合分析正确的直角分解.减少顺序模型的模型.

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结论:

  • 减少顺序的POD-Galerkin模型是有效的动运动模拟.
  • 这种方法显著降低了FSI分析的计算成本.
  • 该模型支持有效的参数研究,这对于FWMAV设计和优化至关重要.