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相关概念视频

Method of Joints: Problem Solving II01:30

Method of Joints: Problem Solving II

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Consider a truss structure with frictionless joints fixed to a wall and roller support. If a force of 150 N is applied to joint A, the forces in each member of the truss can be determined using the method of joints.
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Structural Classification of Joints01:20

Structural Classification of Joints

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Joints, also known as articulations, are classified based on their structural characteristics, i.e., based on whether the articulating surfaces of the adjacent bones are directly connected by fibrous connective tissue or cartilage, or whether the articulating surfaces contact each other within a fluid-filled joint cavity. These differences serve to divide the joints of the body into three structural classifications.
A fibrous joint is where the adjacent bones are united by fibrous connective...
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Method of Joints: Problem Solving I01:30

Method of Joints: Problem Solving I

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The method of joints is a commonly used technique to analyze the forces in structural trusses. The method is based on the principle of equilibrium, which assumes that the truss members are connected by frictionless pins. The forces at each joint can be determined by considering the equilibrium of the forces acting on that joint. Consider a truss structure with two forces of 20 N and 10 N acting at joints C and D, respectively. The method of joints can be used to determine the forces FCB, FDC,...
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Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

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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...
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Method of Joints01:30

Method of Joints

1.3K
The method of joints is a commonly used technique to analyze the forces in structural trusses. The method is based on the principle of equilibrium, which assumes that the truss members are connected by frictionless pins. The forces at each joint can be determined by considering the equilibrium of the forces acting on that joint.
Since plane truss members are in the same plane, each joint is subjected to a coplanar and concurrent force system. To apply the method of joints, the first step is to...
1.3K
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

865
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...
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相关实验视频

Updated: Jan 10, 2026

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
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基于IMU的任意连接的联合轴识别方法在OpenSim中 - 一个模拟研究研究.

Iris Wechsler1, Julian Shanbhag2, Sandro Wartzack2

  • 1Engineering Design, Friedrich-Alexander-Universität Erlangen-Nürnberg, Martensstrasse 9, 91058, Erlangen, Germany. wechsler@mfk.fau.de.

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|November 22, 2025
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概括
此摘要是机器生成的。

本研究提出了一种分析方法,用于准确识别肌肉骨模拟中的关节轴,使用OpenSim. 该方法可靠地确定固定和移动的关节旋转中心,即使有杂的运动数据.

关键词:
生物机械建模和仿真旋转的瞬间轴.联合轴识别 联合轴识别测量噪声的测量噪声模型个性化个性化

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相关实验视频

Last Updated: Jan 10, 2026

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Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion

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An Inertial Measurement Unit Based Method to Estimate Hip and Knee Joint Kinematics in Team Sport Athletes on the Field
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科学领域:

  • 生物力学 生物力学
  • 计算建模 计算建模
  • 肌肉骨模拟系统的模拟

背景情况:

  • 个性化关节轴对于准确的肌肉骨模拟至关重要.
  • 当前的方法在确定关节旋转中心方面可能存在局限性.

研究的目的:

  • 在OpenSim中调查用于识别瞬间旋转轴的分析方法的准确性和性能.
  • 评估该方法对固定和移动联合中心的适用性.

主要方法:

  • 使用相对线性和角速度数据计算即时旋转中心.
  • 将该方法应用于双摆形模型和肌肉骨模型中的部/膝关节.
  • 用无噪声和有噪声的合成运动数据测试了该方法.

主要成果:

  • 分析方法通过无噪声数据准确地确定了联合旋转中心.
  • 噪音数据需要过或优化,以准确确定旋转中心.
  • 这种方法成功地确定了任意关节的旋转中心.

结论:

  • 开发的分析方法提高了肌肉骨模拟的准确性.
  • 这种方法是多功能,适用于固定和移动的关节旋转中心.
  • 它比生物机械模拟中常用的方法更先进.