A tri-objective preference-based uniform weight design method using Delaunay triangulation

2021 ◽  
Author(s):  
Dazhuang Liu ◽  
Yutao Qi ◽  
Rui Yang ◽  
Yining Quan ◽  
Xiaodong Li ◽  
...  
Keyword(s):  
Delaunay Triangulation ◽  
Design Method ◽  
Weight Design

A New Design Method for Axially Loaded Thin-Walled Cylindrical Shells Based on Elasto-Plastic Buckling Analysis

2019 ◽  
Author(s):  
Peng Jiao ◽  
Zhiping Chen ◽  
He Ma
Keyword(s):  
Design Method ◽  
Cylindrical Shells ◽  
Load Carrying Capacity ◽  
Test Results ◽  
Geometric Imperfections ◽  
Compression Load ◽  
Load Carrying ◽  
Weight Design ◽  
Thin Walled ◽  
Improved Design

Abstract In engineering, thin-walled cylindrical shells subjected to axial compression load are very sensitive to geometric imperfections and are prone to buckling. However, how to reasonably take into account the influence of geometric imperfections on the load carrying capacity of thin-walled cylindrical shells is always the bottleneck of light-weight design of these structures. In this paper, four perturbation load approach (4PLA) is adopted to consider the influence of geometric imperfections. By judging the potential buckling status of cylindrical shells, a new improved design method based on 4PLA for thin-walled cylindrical shells is proposed, in which the influence of radius-to-thickness ratio, length-to-radius ratio, Young’s modulus and material yield strength are systematically considered. Correspondingly, the buckling tests for two steel cylindrical shells with the same geometric and material parameters are conducted. Compared with the experimental results and other test results in open literatures, the superiority and safety of proposed method for the preliminary design of thin-walled cylindrical shells are validated.

Coefficient Distribution Method for Minimum Weight Design of Large-Span Determinate Trusses

2010 ◽  
Vol 163-167 ◽  
pp. 2424-2430
Author(s):  
Wen Feng Du ◽  
Zhi Yong Zhou ◽  
Sheng Xiang Wang ◽  
Fu Dong Yu
Keyword(s):  
Design Method ◽  
Minimum Weight ◽  
Cauchy Inequality ◽  
Calculation Formula ◽  
Minimum Weight Design ◽  
Distribution Method ◽  
Large Span ◽  
Coefficient Distribution ◽  
Study Results ◽  
Weight Design

The minimum weight design method of large-span statically determinate trusses satisfying the displacement constraint is studied. The displacement calculation formula is provided, and the critical condition of minimum weight design satisfying the condition of allowed displacement is educed using Cauchy inequality. The distribution coefficient, which is used to obtain the minimum weight design, is defined and the coefficient distribution method is proposed. An engineering example is analyzed using the coefficient distribution method above, and the compared results are discussed. Study results show that the proposed method, coefficient distribution method, is correct，reliable and effective.

Application of a work-centered design method to support counterspace operations

2005 ◽  
Author(s):  
Michael Szczepkowski ◽  
Kelly Neville ◽  
Ed Popp
Keyword(s):  
Design Method
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