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Related Concept Videos

Design Consideration01:22

Design Consideration

339
Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key...
339
Internal Loadings in Structural Members: Problem Solving01:28

Internal Loadings in Structural Members: Problem Solving

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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.
To illustrate this, let's consider a beam OC of 5 kN, inclined at an angle of 53.13° with the horizontal and supported at both ends. Determine the internal...
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Resultant of a General Distributed Loading01:13

Resultant of a General Distributed Loading

771
While designing structures exposed to non-uniform loads, it is crucial to consider the resultant force and its location. This resultant force is a single vector representing the net force applied due to the distributed load.
Examples such as load distribution due to wind and load distribution on a bridge illustrate how this concept is used to analyze and design safe, reliable structures under variable loading conditions. Most structures, such as residential buildings, bridges, and towers, are...
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Prismatic Beams: Problem Solving01:15

Prismatic Beams: Problem Solving

211
In the design of a supported timber beam subjected to a distributed load, both the beam's physical dimensions and the timber's characteristics, such as its grade and species, are critical. These factors determine the allowable stress values, which are crucial for calculating the necessary beam depth to ensure structural integrity and safety.
The design begins with analyzing the beam as a free body to identify moments and force balances, thereby determining support reactions. Next, the...
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Rigid Body Equilibrium Problems - II01:21

Rigid Body Equilibrium Problems - II

7.5K
A rigid body is in static equilibrium when the net force and the net torque acting on the system are equal to zero.
Consider two children sitting on a seesaw, which has negligible mass. The first child has a mass (m1) of 26 kg and sits at point A, which is 1.6 meters (r1) from the pivot point B; the second child has a mass (m2) of 32 kg and sits at point C. How far from the pivot point B should the second child sit (r2) to balance the seesaw?
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Design of Columns under an Eccentric Load01:21

Design of Columns under an Eccentric Load

734
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...
734

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Updated: Sep 26, 2025

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump
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An integrated expert weight determination method for design concept evaluation.

Zhe Chen1,2, Peisi Zhong3, Mei Liu4

  • 1Advanced Manufacturing Technology Center, Shandong University of Science and Technology, Qingdao, 266590, China.

Scientific Reports
|April 16, 2022
PubMed
Summary
This summary is machine-generated.

Determining expert weights is crucial for evaluating complex product designs. This study introduces a novel two-layer method to accurately assign these weights, improving design concept evaluation accuracy.

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Area of Science:

  • Engineering Design
  • Decision Science
  • Product Development

Background:

  • Expert weight determination is vital for complex product design concept evaluation but often overlooked.
  • Evaluating complex designs requires input from diverse expert groups.
  • Accurate expert weighting significantly impacts the reliability of design evaluations.

Purpose of the Study:

  • To propose a novel integrated two-layer method for determining expert weights in complex product design evaluation.
  • To enhance the accuracy and consensus in expert-driven design concept assessment.
  • To provide a systematic approach for weighting experts from varied backgrounds.

Main Methods:

  • A hybrid model combining the entropy weight model and Multiplicative Analytical Hierarchy Process (AHP) in the first layer.
  • A minimized variance model applied in the second layer to achieve expert consensus.
  • Integration of both layers to derive the final expert weights.

Main Results:

  • The proposed method effectively determines expert weights for design concept evaluation.
  • Comparison with non-expert-based evaluation shows improved accuracy when using the expert weighting method.
  • A case study on cruise ship cabin design validates the method's feasibility and effectiveness.

Conclusions:

  • The novel two-layer expert weight determination method enhances the accuracy of complex design concept evaluation.
  • This approach provides a robust framework for integrating diverse expert opinions.
  • The method is a valuable tool for decision-makers in product development and engineering design.