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Virtual Work for a System of Connected Rigid Bodies01:06

Virtual Work for a System of Connected Rigid Bodies

460
Virtual work is a powerful method used to solve problems involving several connected rigid bodies. When the system is in equilibrium, virtual work is zero. This allows the calculation of the resulting forces when a system undergoes a virtual displacement. When attempting to analyze such a system, first, use a free-body diagram, where an independent coordinate represents the configuration of the links, and mark its deflected position resulting from the positive virtual displacement.
Next,...
460
Three-Dimensional Force System:Problem Solving01:30

Three-Dimensional Force System:Problem Solving

720
A three-dimensional force system refers to a scenario in which three forces act simultaneously in three different directions. This type of problem is commonly encountered in physics and engineering, where it is necessary to calculate the resultant force on the system, which can then be used to predict or analyze the behavior of the object or structure under consideration.
To solve a three-dimensional force system, first resolve each force into its respective scalar components. Do this using...
720
Virtual Work01:20

Virtual Work

928
The principle of virtual work states that if a body is in static and dynamic equilibrium, then the sum of all the virtual work done by all external forces and couple moments for any given virtual displacement must be zero.
In static equilibrium, a body can experience an imaginary or virtual movement, such as displacement or rotation. The virtual work done by a force is equal to the dot product of force and virtual displacement in the direction of the force. When it comes to virtually rotating a...
928
Principle of Virtual Work: Problem Solving01:13

Principle of Virtual Work: Problem Solving

1.3K
The principle of virtual work is an essential concept in the field of mechanics and engineering. This is used to solve problems related to the equilibrium of a structure or system. It is based on the assumption that if a system is in equilibrium, the work done by all the forces during a virtual displacement is zero. This principle is applied by considering virtual displacements of the system and the corresponding work done by internal and external forces.
To apply the principle of virtual work,...
1.3K

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Related Experiment Video

Updated: Aug 24, 2025

Author Spotlight: Enhancing Engineering Education via WebVR-Based Online Laboratories
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Author Spotlight: Enhancing Engineering Education via WebVR-Based Online Laboratories

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Robotic construction analysis: simulation with virtual reality.

Nuno Pereira da Silva1, Sara Eloy1, Ricardo Resende1

  • 1Instituto Universitário de Lisboa (ISCTE-IUL), ISTAR, Av. das Forças Armadas, 1649-026 Lisboa, Portugal.

Heliyon
|October 25, 2022
PubMed
Summary

This study introduces a virtual reality simulation methodology for robotic construction, using drones to precisely predict project duration and costs while identifying potential issues before physical builds.

Keywords:
AssemblyConstruction simulationDroneRobotic armRobotic constructionVirtual reality

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Area of Science:

  • Robotics and Automation
  • Virtual Reality Simulation
  • Construction Management

Background:

  • Robotic construction technologies, particularly drones, are advancing, offering potential improvements.
  • Assessing economic and social impacts of robotic construction requires costly physical testing.
  • Current research primarily focuses on academic applications of robotic assembly.

Purpose of the Study:

  • To present a methodology for simulating robotic construction using virtual reality.
  • To test the hypothesis that VR simulation enhances prediction accuracy for construction time and cost.
  • To evaluate VR simulation's capability in detecting construction problems.

Main Methods:

  • Literature review of robotic construction (drones, robotic arms) and VR simulations.
  • Development and application of a novel VR simulation methodology for robotic construction.
  • Analysis of simulation data for three architectonic elements under various scenarios.

Main Results:

  • VR simulation demonstrated potential for increased precision in predicting construction duration and cost.
  • The simulation methodology facilitated the identification of potential construction problems.
  • Comparison with traditional methods highlighted differences in time and cost metrics.

Conclusions:

  • Virtual reality simulation is a viable tool for assessing robotic construction projects.
  • VR simulation can mitigate risks by enabling early detection of issues and improving cost/time predictions.
  • This methodology supports more efficient and accurate planning in robotic construction.