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Related Concept Videos

Cable Subjected to a Distributed Load01:24

Cable Subjected to a Distributed Load

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The analysis of suspension bridges is a complex and critical process that involves multiple factors, including the shape and tension of the main cables. The main cables of suspension bridges are subjected to distributed loads, which result in changes in tensile forces and deformation of the cable. These loads must be carefully considered to ensure that the bridge is safe and capable of supporting the weight of different loads.
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When dealing with a cable that is fixed to two supports and subjected to uniform loading, it is crucial to determine the maximum tension in the cable. This process can be broken down into several key steps, as outlined below:
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Flexible cables are commonly used in various applications for support and load transmission. Consider a cable fixed at two points and subjected to multiple vertically concentrated loads. Determine the shape of the cable and the tension in each portion of the cable, given the horizontal distances between the loads and supports.
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Overhead power transmission lines rely on cables to carry electricity across large distances. To ensure the stability and functionality of these lines, it is crucial to understand the shape and tension experienced by the cables under the influence of their weight.
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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.
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Internal Loadings in Structural Members: Problem Solving01:28

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When designing or analyzing a structural member, it is important to consider the internal loadings developed within the member. These internal loadings include normal force, shear force, and bending moment. Engineers can ensure that the structural member can support the applied external forces by calculating these internal loadings.
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Related Experiment Video

Updated: Jan 16, 2026

Determination of the Mechanical Properties of Flexible Connectors for Use in Insulated Concrete Wall Panels
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Identification of Static Loads in Wharf Mooring Cables Using the Influence Coefficient Method.

Jia Zhou1,2, Changshi Xiao1, Langxiong Gan1

  • 1School of Navigation, Wuhan University of Technology, Wuhan 455063, China.

Sensors (Basel, Switzerland)
|September 27, 2025
PubMed
Summary

This study introduces an indirect method for measuring mooring cable static loads using bollard strains. The approach enhances accuracy through optimal strain gauge placement and a genetic algorithm, offering a reliable framework for real-time monitoring.

Keywords:
indirect measurementinfluence coefficient matrix (ICM)load identificationmooring cable loadstrain gauge placement

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Area of Science:

  • Naval Architecture and Marine Engineering
  • Structural Health Monitoring
  • Mechanical Engineering

Background:

  • Direct measurement of mooring cable loads on ships at wharves presents significant practical difficulties.
  • Accurate monitoring of mooring forces is crucial for maritime safety and operational efficiency.

Purpose of the Study:

  • To develop and validate an indirect method for identifying mooring cable static loads.
  • To enhance the accuracy of load measurement through optimized sensor placement and data processing.

Main Methods:

  • Finite element analysis (FEA) of bollards to determine strain distribution under unit loads.
  • Genetic algorithm (GA) for optimizing strain gauge placement and orientation.
  • Influence Coefficient Matrix (ICM) method to correlate bollard strains with mooring cable loads.

Main Results:

  • A numerical case study confirmed the feasibility and high accuracy of the indirect load identification method.
  • Experimental verification demonstrated the method's reliability under various conditions.
  • The derived load coefficient matrix effectively relates measured strains to cable loads.

Conclusions:

  • The proposed indirect method provides an effective and reliable approach for measuring mooring cable static loads.
  • The research offers a technical framework for real-time monitoring of mooring cable tensions.
  • This technique addresses the practical challenges of direct load measurement in maritime operations.