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相关概念视频

Eccentric Loading01:16

Eccentric Loading

393
Eccentric loading is a crucial concept in the study of structural engineering and mechanics, particularly when analyzing the stability and stress distribution in columns. Unlike centric loading, where the force is applied along the centroidal axis, causing uniform compression, eccentric loading occurs when a force is applied off-center. This off-center application introduces not only direct compressive stress but also bending stress, significantly influencing the column's behavior under...
393
Eccentric Axial Loading in a Plane of Symmetry01:16

Eccentric Axial Loading in a Plane of Symmetry

202
Eccentric axial loading occurs when an axial load is applied away from the centroidal axis of a structural member. This scenario is common in engineering, where structural elements may not be directly aligned due to various design or functional requirements.
202
General Case of Eccentric Axial Loading01:12

General Case of Eccentric Axial Loading

189
Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from symmetrical bending, which are essential for designing structures to withstand different loading conditions.
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
189
Design of Columns under an Eccentric Load01:21

Design of Columns under an Eccentric Load

555
Designing columns to withstand eccentric loads is a critical aspect of structural engineering, ensuring structures can support off-center loads without failure. This design process must account for the additional normal stresses introduced by eccentric loading, which can significantly influence a column's stress distribution and overall stability. An eccentric load applied to a column induces normal stresses that can be conceptualized as a combination of stresses due to an equivalent...
555
Exercise and Muscle Performance01:27

Exercise and Muscle Performance

1.5K
Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
1.5K
Work and Energy for Variable Forces01:10

Work and Energy for Variable Forces

3.7K
When an object is acted upon by a variable force, the amount of work done and the change in energy of the object can be more complex to calculate compared to when a constant force is applied. Work is the product of force and displacement, while energy is the capacity of a system to do work. When a constant force is applied to an object, the work done can be calculated as the product of the force and the distance moved in the direction of the force. However, when a variable force is applied, the...
3.7K

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相关实验视频

Updated: Jul 12, 2025

A Simple and Inexpensive Running Wheel Model for Progressive Resistance Training in Mice
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在飞轮训练中,负载和训练变量之间的异常超负荷差异与训练变量之间的异常超负荷差异.

Alejandro Muñoz-López1, Fábio Yuzo Nakamura2, Marco Beato3

  • 1Departamento de Motricidad Humana y Rendimiento Deportivo, University of Seville, Seville, Spain.

Biology of sport
|October 23, 2023
PubMed
概括
此摘要是机器生成的。

飞轮练习可能会显示异常过载,特别是在以速度为导数的测量中,如角速度和功率. 较低的负载更有效地观察这种效应并监测训练反应.

关键词:
奇特的培训 奇特的培训预防伤害的预防.阻力训练 阻力训练 阻力训练Squat 腰 腰 腰 腰 腰 腰 腰 腰 腰 腰力量就是力量.

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科学领域:

  • 运动科学 运动科学 运动科学
  • 生物力学 生物力学
  • 运动生理学 运动生理学

背景情况:

  • 在飞轮练习中的古怪过载是有争议的.
  • 了解同心:异心的机械输出比率对于优化培训至关重要.

研究的目的:

  • 在飞轮式练习中分析各种负载和变量的同心:异心机械输出比率的差异.
  • 研究机械输出上的负载和相位 (同心与异心) 之间的相互作用.
  • 为了确定在哪些条件下异常过载最明显.

主要方法:

  • 20名身体活跃的男子在五个不同的惯性时刻进行了飞轮.
  • 用旋转编码器测量角度速度;用力板测量垂直力.
  • 速度,加速度,功率,力和扭矩的平均值和峰值为同心相和异心相计算.

主要成果:

  • 对于平均角速度,峰值垂直力,峰值角加速,峰值功率和峰值扭矩,观察到一个显著的负载 × 阶段相互作用.
  • 在速度衍生变量 (角速度,加速度,功率) 中,观察到更高的异常过载值.

结论:

  • 速度衍生的峰值变量和较低的负载更有可能在飞轮坐中表现出奇特的过载.
  • 这些发现可以为对飞轮训练方案反应的监测提供信息.