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相关概念视频

Machines: Problem Solving II01:30

Machines: Problem Solving II

308
Machines are complex structures consisting of movable, pin-connected multi-force members that work together to transmit forces. Consider a lifting tong carrying a 100 kg load. It comprises movable sections DAF and CBG linked together with member AB.
308
Distributed Loads01:19

Distributed Loads

528
Distributed loads are a common type of load that engineers and scientists encounter in various practical situations. Distributed loads often refer to a type of load spread over a surface or a structure and can be modeled as continuous force per unit area.
For example, consider a bookshelf filled with books stacked vertically adjacent to each other. The weight of the books is evenly distributed over the length of the shelf. As a result, the pressure at different locations on the surface of the...
528
Frames: Problem Solving I01:24

Frames: Problem Solving I

465
Consider a jib crane with an external load suspended from the pulley. The dimensions of the crane members are shown in the figure. A systematic analysis of the frame structure is required to determine the reaction forces at the pin joints, assuming that the pulleys are frictionless.
465
Distributed Loads: Problem Solving01:21

Distributed Loads: Problem Solving

639
Beams are structural elements commonly employed in engineering applications requiring different load-carrying capacities. The first step in analyzing a beam under a distributed load is to simplify the problem by dividing the load into smaller regions, which allows one to consider each region separately and calculate the magnitude of the equivalent resultant load acting on each portion of the beam. The magnitude of the equivalent resultant load for each region can be determined by calculating...
639
Mechanical Efficiency of Real Machines01:14

Mechanical Efficiency of Real Machines

669
The mechanical efficiency of a machine is a fundamental concept that describes how effectively a machine can convert input work into output work. According to this concept, the efficiency of a machine is equal to the ratio of the output work to the input work. An ideal machine, meaning a machine that has no energy losses, has an efficiency of one. This implies that the input work and the output work are equal.
However, in reality, no machine can be truly ideal, and all of them experience some...
669
Eccentric Loading01:16

Eccentric Loading

347
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...
347

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相关实验视频

Updated: Jun 21, 2025

Kinematics and Ground Reaction Force Determination: A Demonstration Quantifying Locomotor Abilities of Young Adult, Middle-aged, and Geriatric Rats
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在铁路货运码头的人类表现.

David Golightly1, James Lonergan2, David Ethell3

  • 1Future Mobility Group, School of Engineering, Newcastle University, Newcastle upon Tyne, UK.

Ergonomics
|July 12, 2024
PubMed
概括
此摘要是机器生成的。

在铁路货运码头的人类表现存在运营风险. 这项研究分析了车活动,环境影响和外部压力,以提高铁路货运运营的安全性和效率.

关键词:
铁路 铁路 铁路 铁路 铁路 铁路货物运输是货物运输的重要组成部分.人类表现人类的表现.后勤物流 后勤物流是指物流.在安全方面,安全是安全的.

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科学领域:

  • 运输安全中的人为因素和人体工程学.
  • 在物流和供应链管理方面的运营研究.
  • 工业环境中的职业健康与安全.

背景情况:

  • 人类性能是铁路货运运营中的关键风险因素,影响了车活动和网络事故.
  • 铁路货运码头是关于人类性能和运营安全的研究不足的领域.
  • 现有的研究还没有完全解决在铁路货运码头的特定背景下人类互动的复杂性.

研究的目的:

  • 调查英国铁路货运场内的人类绩效因素.
  • 识别与在车运营和列车准备中的人类表现相关的风险.
  • 探索潜在的解决方案,以提高铁路货运码头的安全性和效率.

主要方法:

  • 在英国五个主要的铁路货运码头进行了超过30小时的直接观测.
  • 与铁路货运地面人员进行了30次深入采访,以收集定性数据.
  • 利用任务建模和人类绩效因素分析,通过与行业人员的研讨会进一步精细化.

主要成果:

  • 获得了对各种货运场活动及其相关的人力绩效要求的全面了解.
  • 确定货运场设计和环境条件对运营性能和安全的重大影响.
  • 确定外部压力的影响,如上游规划,对整体货运码头业绩的影响.

结论:

  • 调查结果为改善当前的铁路货运运营和减轻与人类有关的风险提供了关键的见解.
  • 建议适用于铁路货运部门未来的技术进步和流程变化.
  • 强调需要继续研究人为因素,以确保铁路货运物流的安全性和效率.