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相关概念视频

Space Trusses: Problem Solving01:29

Space Trusses: Problem Solving

544
A space truss is a three-dimensional counterpart of a planar truss. These structures consist of members connected at their ends, often utilizing ball-and-socket joints to create a stable and versatile framework. Due to its adaptability and capacity to withstand complex loads, the space truss is widely used in various construction projects.
Consider a tripod consisting of a tetrahedral space truss with a ball-and-socket joint at C. Suppose the height and lengths of the horizontal and vertical...
544
Space Trusses01:25

Space Trusses

741
A space truss is a three-dimensional counterpart of a planar truss. These structures consist of members connected at their ends, often utilizing ball-and-socket joints to create a stable and versatile framework. The space truss is widely used in various construction projects due to its adaptability and capacity to withstand complex loads.
At the core of a space truss lies the fundamental unit known as the tetrahedron. This structure is composed of six members that form a three-dimensional shape...
741
Introduction to Structures01:30

Introduction to Structures

969
A structure is defined as a system of interconnected members designed to support or transfer forces and successfully withstand the loads acting on them. The internal forces of a structure can be determined by decomposing the structure and analyzing the free-body diagrams of the individual members or of a combination of members. This helps in understanding the structural elements' behavior and ensuring that the structure is stable and can withstand the subjected loads.
There are three main...
969
Applications of Stress01:04

Applications of Stress

243
Consider a structure made of a boom and a rod designed to support a load. These two components are connected by a pin and stabilized by brackets and pins. The boom and the rod are detached from their supports to assess the different stresses imposed on this structure, and a free-body diagram is drawn. Then, all the forces applied, including the load acting on the structure, are identified. The reaction forces exerted on both the boom and the rod are computed using the equilibrium equations.
The...
243
Stability of structures01:14

Stability of structures

153
In mechanical engineering, the stability of systems under various forces is critical for designing durable and efficient structures. One fundamental way to explore these concepts is by analyzing systems like two rods connected at a pivot point, O, with a torsional spring of spring constant k at the pivot point. This system is similar in appearance to a scissor jack used to change tires on a car. In this case, the arms of the linkage (equivalent to the rods in this system) are entirely vertical,...
153
Indeterminate Structure01:18

Indeterminate Structure

493
Indeterminate structures refer to structures where internal forces and reactions cannot be determined using only the equations of static equilibrium.  Indeterminate structures have more unknown forces and reaction forces than equations of static equilibrium that can be used to determine them. Indeterminate structures are often used in engineering to create complex, efficient, and aesthetically pleasing structures. There are various types of indeterminate structures used in engineering and...
493

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相关实验视频

Updated: May 28, 2025

Optimization, Test and Diagnostics of Miniaturized Hall Thrusters
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Published on: February 16, 2019

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适应式可部署结构,可通过主动控制的张密度来实现空间碎片清除.

Endong Shang1, Ao Li1, Md Shariful Islam2

  • 1School of Mechanical Engineering, University of Science and Technology Beijing, Beijing, 100083, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|February 14, 2025
PubMed
概括

本研究提出了一种适应性张密度结构,用于清除中型空间碎片. 通过有效捕获和减轻危险的轨道物体,创新的设计提高了轨道安全.

关键词:
积极控制活动控制.适应性配置的适应性配置.可部署结构的部署结构.太空碎片 太空碎片十分之一的诚信.

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相关实验视频

Last Updated: May 28, 2025

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12:22

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科学领域:

  • 航空航天工程 航空航天工程
  • 材料科学 材料科学 材料科学
  • 机器人技术 机器人技术 机器人技术

背景情况:

  • 地球轨道面临着由太空碎片造成的越来越多的拥堵.
  • 现有的减缓策略不足以应对中型碎片 (0.4-10厘米).
  • 这种差距对太空运营和安全构成重大风险.

研究的目的:

  • 引入创新的适应式可部署结构,用于中等碎片的清除.
  • 分析影响折叠和部署的结构参数.
  • 评估结构的承载能力和抗冲击能力.

主要方法:

  • 详细介绍了主动控制的延伸性结构的基本配置和部署过程.
  • 分析了影响性能的关键结构参数.
  • 评估的承载能力和抗冲击能力与网状织物集成.
  • 建造并验证了一个1:20尺寸的原型.

主要成果:

  • 确定了有效清除碎片的最佳参数和形态.
  • 展示了结构的适应性配置能力.
  • 通过原型测试验证了它对太空碎片影响的弹性.

结论:

  • 开发的延伸度结构为中等空间碎片清除提供了可行的解决方案.
  • 适应性和抗冲击设计显著提高了轨道安全.
  • 这项创新解决了当前空间垃圾减缓战略中的一个关键缺口.