Reliability-Based Optimization Design of Variable Cross-Section Component

2012 ◽  
Vol 446-449 ◽  
pp. 1099-1102
Author(s):  
Tian Xiao Zhang ◽  
Xin Hui Liu
Keyword(s):  
Cross Section ◽  
Optimization Design ◽  
Random Variable ◽  
Variable Cross Section ◽  
Engineering Practice ◽  
Variable Cross ◽  
Reliability Design ◽  
Basic Random Variable ◽  
Reliability Based Optimization ◽  
Variable Probability

Abstract: Variable cross-section components are widely used in engineering practice. It is clear that reliability-based optimization design of variable cross-section component is important for engineering design. This variable section widget for reliability and the perturbation design, we propose a perturbation method of the reliability design about the variable cross-section components. We may rapidly obtain the variable cross-section component's reliability information accurately, in basic random variable probability characteristic certain situation. We propose a method with practicality for the relevant reliability design.

Reliability Analysis and Sensitivity Design of the Uniform Strength Component

2012 ◽  
Vol 446-449 ◽  
pp. 1203-1206
Author(s):  
Qiao Ling Liu ◽  
Hai Feng Xing ◽  
Tian Xiao Zhang
Keyword(s):  
Normal Distribution ◽  
Reliability Analysis ◽  
Cross Section ◽  
Design Method ◽  
Random Variable ◽  
Variable Cross Section ◽  
Variable Cross ◽  
Uniform Strength ◽  
Reliability Sensitivity ◽  
Variable Probability

In this study, the reliability sensitivity of the uniform strength Variable Cross-section Component is analyzed, which is the normal distribution. We propose a method for the reliability and sensitivity of the Uniform Strength Components. We may accurately obtain the uniform strength component's reliable sensitivity information on basic of random variable probability characteristic for certain situation. Through the value examples, we have studied the random variable reliable sensitivity for dangerous sections. We propose a design method with practicality for the uniform strength components.

Research on the 3D Modeling Method of Epicycloids’ Bevel Gear Based on Pro/E

2011 ◽  
Vol 120 ◽  
pp. 15-19
Author(s):  
Chun Xiang Wang ◽  
Fan Juan Meng ◽  
Jing Qiang Zhang
Keyword(s):  
Cross Section ◽  
Optimization Design ◽  
Gear Tooth ◽  
Axial Direction ◽  
Variable Cross Section ◽  
Modeling Method ◽  
Bevel Gear ◽  
Solid Model ◽  
Variable Cross ◽  
3D Solid

In order to obtain 3D solid model of an Oerlikon system’s prolate epicycloidal bevel gear by full generating processing, the solid modeling method for the gear was studied in Pro/E. First, Drawing benchmark circles (base on the circle and reference circle as well as tip circle and root circle)and involute tooth profile of virtual equivalent gears of both large end and small end of the real gear, and then an intercepted segment of prolate epicycloid which has the same trend to the tooth and is controlled by prolate epicycloidal equations is projected to the surface of the gear’s root cone for the sake of getting tooth curve along axial direction. In the end, along the tooth curve and on the root cone conducting a variable cross section solid scanning to tooth shaped cross section, a complete gear tooth will be gained and at last model establishing will be finished. This method provided digital basis for optimization design, reverse design and rapid prototyping of this kind of gear, and so its design efficiency is improved.

Reliability-Based Robust Design of Variable Cross-Section Wedge Beam

2012 ◽  
Vol 157-158 ◽  
pp. 74-77
Author(s):  
Tian Xiao Zhang ◽  
Xin Hui Liu ◽  
Qiao Ling Liu
Keyword(s):  
Normal Distribution ◽  
Reliability Analysis ◽  
Cross Section ◽  
Robust Design ◽  
Reliability Index ◽  
Variable Cross Section ◽  
Design Model ◽  
Engineering Practice ◽  
Variable Cross

Variable cross-section components are widely used in engineering practice. The paper discussed the reliability analysis, sensitivity numeration and robust design for variable cross-section components obeying normal distribution, built up the reliability-based robust design model, propose a method discussing reliability-based robust design of variable cross-section wedge beam. According to the numeration, obtain the graph of reliability index and reliability of variable cross-section components, obtain the method designing reliability-based robust of variable cross-section components with the certain reliability index.

The Multi-Objective Optimization Design of Leaf Spring of few Piece Variable Cross-Section

2011 ◽  
Vol 213 ◽  
pp. 231-235
Author(s):  
Qin Man Fan ◽  
Qin Man Fan
Keyword(s):  
Cross Section ◽  
Optimization Design ◽  
Optimal Solution ◽  
Variable Cross Section ◽  
Leaf Spring ◽  
Variable Cross ◽  
Multi Objective Optimization ◽  
Solution Quality ◽  
Front Suspension ◽  
Multi Objective

Being the ability of global optimization, MOPSO algorithm have some virtue such as high calculate velocity, good solution quality, great robustness, and so on. In allusion to a leaf spring of few piece variable cross-section, its multi-objective optimization mathematical model was built regarding minimum mass and minimum stiffness deviation as sub-objective functions. Taking the leaf spring of front suspension of a light truck as an example, the Pareto optimal solution set of optimization problem was obtained by using MOPSO algorithm. The optimization results show that the mass of the leaf spring reduced by 24.2% and the stiffness deviation is only 0.32% after optimization by using MOPSO algorithm.

Vibration Characteristics and Optimization of Variable Cross-Section Cylindrical Shell Structure under Multi-Point Excitation

2013 ◽  
Vol 372 ◽  
pp. 547-551
Author(s):  
Lin Chen ◽  
Xiao Zhong Xie ◽  
Zhuo Li ◽  
Fu Zhen Pang
Keyword(s):  
Cylindrical Shell ◽  
Cross Section ◽  
Shell Structure ◽  
Optimization Design ◽  
Acoustic Radiation ◽  
Variable Cross Section ◽  
Low Noise ◽  
Structural Vibration ◽  
Variable Cross ◽  
Transfer Path

According to the loading feature and the structure form, a gear reducer box can be simplified to a variable cross-section cylindrical shell structure excited by multipoint force. Meanwhile, a theoretical model is developed to analyze the structural vibration and acoustic characteristics and to find out the dominant component of vibration. Then, the influence of different parameters, such as, the local structure thickness, constrained damping layer and the insulation layer on acoustic radiation performance of the variable cross-section cylindrical shell structure are investigated by numerical calculation. Finally, an optimization design scheme of a low-noise structure is proposed because of the two aspects about noise source and noise transfer path.

Design of the PRO/MECHANICA to Variable Cross-Section of Micro-Mechanical Cantilever Based on the Finite Element Method

2012 ◽  
Vol 184-185 ◽  
pp. 146-150
Author(s):  
Chun Li Wei ◽  
Wei Zhang ◽  
Hui Wei
Keyword(s):  
Sensitivity Analysis ◽  
Cantilever Beam ◽  
Cross Section ◽  
Optimization Design ◽  
Variable Cross Section ◽  
Variable Cross ◽  
The Finite Element Method ◽  
Analysis Model ◽  
Modeling Analysis ◽  
Body Design

Abstract: In order to achieve the design of micro-machined micro- mechanical cantilever beam of variable cross-section through the PRO / MECHANICA micro-mechanical variable cross-section cantilever beam to mathematical modeling , analysis model , a standard static analysis , the primary design model , the local sensitivity analysis, global sensitivity analysis and optimization design aspects . By the analysis of research data , this body design is feasible and adaptable stress distribution characteristics of a good , good appearance of the structure .

Optimization Design of Section for Bisymmetric Built-Up Steel H-Shaped Beams

2013 ◽  
Vol 405-408 ◽  
pp. 948-951
Author(s):  
Su Juan Dai ◽  
Yan Chun Meng
Keyword(s):  
Cross Section ◽  
Optimization Design ◽  
Theoretical Foundation ◽  
Design Method ◽  
Variable Cross Section ◽  
Steel Beam ◽  
Variable Cross ◽  
Concentrated Load ◽  
Design Procedures ◽  
Section Design

Built-up steel H-shaped beam with variable cross-section design can save steel and realize the economy requirements of structure.The existing design method of variable width of flange of steel beam is only applicable to beam under uniformly distributed load.This paper presents optimization design procedures of the Variable cross-section.The related formulas used to optimization design of section for bisymmetric built-up steel H-shaped beams under concentrated load were derived,and the position of varying cross section of beams under concentrated load was calculated ,it is convenient to be used in engineering design,and provides theoretical foundation for variable cross-section design .

scholarly journals A New Buckling-Restrained Brace with a Variable Cross-Section Core

2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
Liang Li ◽  
Tianhua Zhou ◽  
Junwu Chen ◽  
Jianfeng Chen
Keyword(s):  
Energy Dissipation ◽  
Cross Section ◽  
Variable Cross Section ◽  
Engineering Practice ◽  
Variable Cross ◽  
Test Results ◽  
Buckling Restrained Brace ◽  
Practical Design ◽  
Mechanical Behaviours ◽  
New Type

In this paper, a new type of buckling-restrained brace characterized by a variable cross-section core (BRB-VCC) is proposed and investigated. The practical design equations of the BRB-VCC are derived based on mechanical and mathematical theories. Six specimens are designed and tested to clarify the mechanical behaviours of the BRB-VCC and to validate the reliability of the proposed equations. The test results show that (1) none of the specimens buckle under compression, as expected, and their ductilities and energy dissipation capacities are satisfactory; (2) the derived formulas are reliable and can be conveniently used in engineering practice; and (3) the yielding displacement of the BRB-VCC is approximately 70% that of the traditional TJ-1 buckling-restrained brace (BRB-TJ-1), which may yield earlier than the BRB-TJ-1 in concrete structures under the action of an earthquake.

Experimental Research of Bottom Chord Splice Joints with Variable Cross-Section in Steel Roof Truss

2011 ◽  
Vol 105-107 ◽  
pp. 1065-1068
Author(s):  
Hong Xia Wan ◽  
De Xu Yan ◽  
Xiao Ping Wang
Keyword(s):  
Cross Section ◽  
Experimental Research ◽  
Failure Modes ◽  
Variable Cross Section ◽  
Steel Tube ◽  
Engineering Practice ◽  
Variable Cross ◽  
Test Setup ◽  
Roof Truss ◽  
Tension Capacity

A workshop’s roof is designed to use steel tube trusses with the span of 24m. There are three kinds of variable cross-section splice joints of the roof truss bottom chord. Nine splice joint specimens, three for each kind, were tested to obtain their tension capacity and failure modes. A special test setup is designed to introduce the tension load to the splice joint specimen. The paper detailed introduced the test setup and method, discussed the failure load and failure mode of the joints. Experimental research indicated that the bottom chord splice joint with variable cross-section of the roof is safe, reliable, having high bearing capacity. The research also validated the correctness of the design and calculation, and provided the basis for the application of such joints in the engineering practice.

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