scholarly journals Section Optimization Design of a Flexible Cable-Bar Tensile Structure Based on Robustness

2021 ◽  
Vol 11 (19) ◽  
pp. 8816
Author(s):  
Lianmeng Chen ◽  
Yihong Zeng ◽  
Weifeng Gao ◽  
Yijie Liu ◽  
Yiyi Zhou
Keyword(s):  
Design Theory ◽  
Optimization Design ◽  
Evaluation Method ◽  
Robustness Analysis ◽  
Performance Criterion ◽  
Structural Quality ◽  
Initial Structure ◽  
Detailed Calculation ◽  
Flexible Cable ◽  
Structural Robustness

As the current literature lacks effective nonlinear robustness evaluation method and optimal design theory of the structural robustness for flexible cable-bar tensile structure, this paper aimed to conduct further studies. Based on the theory, a fundamental robustness analysis method and a detailed calculation way through the combination of induction of performance criterion and random theory for nonlinear structural robustness quantitative evaluation method were proposed. Following this, a real Geiger cable dome structure was studied as its research object, and the influences of structural robustness of simultaneous changes of all elements section and changes of every kind of element section were analysed, respectively. Finally, the genetic algorithm was applied through MATLAB and ANSYS software to achieve optimal section layout, with the goal of minimizing structural quality on the condition that the structural robustness indicator keep less than that of the initial structure. The result revealed that the increase of the section of elements can effectively enhance structural robustness and the section changes of various elements showed different sensitivities to the influence of structural robustness. Meanwhile, structural quality can be effectively reduced by optimizing measures such as increasing the section of elements with significant effect on structural robustness and reducing the section of elements with minor effects on structural robustness, while the structural robustness indicator keeps less than that of the initial structure. The optimization reveals that quality was reduced by 42.5% in this paper.

scholarly journals Reliability evaluation for colliery machine based on fuzzy interval model

2021 ◽  
Vol 69 (5) ◽  
pp. 149
Author(s):  
Li Yang ◽  
Chuang Chen
Keyword(s):  
Evaluation System ◽  
Design Theory ◽  
Optimization Design ◽  
Evaluation Method ◽  
Design Method ◽  
Reliability Evaluation ◽  
Fuzzy Evaluation ◽  
Mechanical Reliability ◽  
Interval Model ◽  
Reliability Design

The mechanical reliability design method is a common method, and it is the most direct and effective method to carry out the mechanical reliability design at present. The reliability optimization design is an effective optimization design method which is developed in combination with the reliability design theory on the basis of the conventional optimization design. Taking the antifriction bearing as an example, this paper systematically expounds all kinds of mechanical reliability design methods. Through comprehensive analysis of various factors that affect the reliability of colliery machine, the index system of colliery machine reliability evaluation is established. Because of the complexity and diversity of the use of colliery machine in the evaluation system, and the fuzziness of human thinking, it is difficult to give the deterministic evaluation information in numerical form, so this paper also analyzes the design method of colliery mechanical reliability, and puts forward an interval fuzzy evaluation method for colliery mechanical reliability evaluation to avoid overload operation of colliery machine and ensure safety production and safety of workers. The simulation results show that the inherent law of reliability is effectively characterized by this method, and it provides a evidence for security produce and scientific decision-making of colliery mechine.

Optimal Robust Fixture Configuration Design Using Computer Experiment

Manufacturing ◽  
2003 ◽  
Author(s):  
L. Shelley Xie ◽  
Agus Sudjianto
Keyword(s):  
Evaluation Method ◽  
Robustness Analysis ◽  
Optimal Solution ◽  
Computer Experiment ◽  
System Response ◽  
New Approach ◽  
New Information ◽  
Reliability Method ◽  
Fixture Configuration

A new FEA based design approach of optimal robust fixture configuration is proposed in this paper, which employs a surrogate model through computer experiment to significantly reduce the intensive computing effort involving numerous FEA system response evaluations. The effects of the fixture variability to the workpiece performance variability are assessed through an efficient robustness evaluation method, First Order Reliability Method (FORM), based on the surrogate computer model. Not restricted to primary datum surface, this new approach enables simultaneous determination of robust locator/clamp locations and clamping forces for a deformable workpiece and thus captures interaction between locating and clamping. The effectiveness of this approach is illustrated though an application example. The results of robustness analysis reveal new information and suggest that the optimal solution resulted from deterministic optimization may not be the best solution when the design is subjected to variability.

scholarly journals Routing Algorithm of Wireless Sensor Network and Robustness Analysis Based on Fuzzy Mathematics

2017 ◽  
Vol 13 (12) ◽  
pp. 85 ◽  
Author(s):  
Ying Xiang ◽  
Miaochao Chen ◽  
Xiaohong Zhuang ◽  
Xiaoxing Li
Keyword(s):  
Wireless Sensor Network ◽  
Sensor Network ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Routing Algorithm ◽  
Robustness Analysis ◽  
Fuzzy Comprehensive Evaluation ◽  
Wireless Sensor ◽  
Fuzzy Mathematics ◽  
Comprehensive Evaluation Method

<p style="margin: 1em 0px;"><span lang="EN-GB"><span style="font-family: Times New Roman; font-size: medium;">In order to reduce the energy consumption and enhance the robustness of wireless sensor network (WSN), this paper proposes a hierarchical clustering routing algorithm based on fuzzy mathematics (HCRAFM). To make a comprehensive analysis of WSN, it is also necessary to detect the robustness of the network. Facing the multiple random variables, the traditional robustness detection models assume that all nodes have the same weight, making it impossible to quantify the analysis indices or obtain accurate results. Thus, the fuzzy mathematics theory was introduced to the WSN robustness detection, forming a fuzzy comprehensive evaluation method. The simulation results show that the HCRAFM strikes a load balance between WSN nodes, extends the life cycle of each node, and prolongs the service life of the network. In addition, the proposed algorithm is proved to have sound robustness and strong applicability.</span></span></p>

An Evaluation Method of Structural Redundancy under Earthquake Action

2015 ◽  
Vol 744-746 ◽  
pp. 873-877
Author(s):  
Nan Hai Zhu ◽  
Xiao Hua Zhao ◽  
Dong Huang ◽  
Bo Zhu
Keyword(s):  
Redundancy Analysis ◽  
Evaluation Method ◽  
Single Layer ◽  
Weak Links ◽  
Structural Redundancy ◽  
Response Sensitivity ◽  
Structural Robustness ◽  
Earthquake Action

Redundancy is an important component of structural robustness. A method is proposed based on the response sensitivity for assessment of the redundancy of structure under earthquake. Redundancy analysis is carried out for a single-layer reticulated dome subjected to earthquake condition. The result shows that the redundancy values are able to reveal the weak links in the structure. Members with a small redundancy are identified as structural weaknesses that are easily damaged under loads, and their failure may cause catastrophic consequences to the structure. Therefore, the members with small redundancies must be treated as key components of the structures.

Equipment Development of Crankshaft Barrel Finishing on Integrated Design Theory

2012 ◽  
Vol 522 ◽  
pp. 264-267 ◽  
Author(s):  
Wen Hui Li ◽  
Sheng Qiang Yang ◽  
Xiu Hong Li
Keyword(s):  
Design Theory ◽  
Optimization Design ◽  
Design Method ◽  
Integrated Design ◽  
Function Optimization ◽  
Equipment Development ◽  
Barrel Finishing

ntegrated design theory and method oriented to the product generalized quality is one design method facing to the full-function and whole performance. Design theory of barrel finishing equipment is put forward by the design of crankshaft barrel finishing equipment, function optimization and visual optimization design are mainly discussed, which can provide the design thought for developing new barrel finishing equipment.

Dynamic Analysis of Less-Teeth Gear Transmission System

2013 ◽  
Vol 397-400 ◽  
pp. 446-450
Author(s):  
Dong Sheng Zhang ◽  
Zhang Lai Lv ◽  
Jian Jun Zhang
Keyword(s):  
Design Theory ◽  
Optimization Design ◽  
Dynamic Contact ◽  
Gear System ◽  
Fem Model ◽  
Profile Modification ◽  
Gear Design ◽  
Gear Transmission System ◽  
Contact Characteristic ◽  
Gear Profile

According to the less-teeth gear design theory, the FEM model of less-teeth gear system was established, and its dynamic contact characteristic was analyzed, then dynamic contact simulation was realized. Laws of contact area, contact stress and tooth stress change over time were got, which can be used for the gear profile modification and dynamic characteristics optimization design of the less-teeth gear system.

Time-Dependent Reliability-Based Robust Optimization Design of Components Structure

2011 ◽  
Vol 199-200 ◽  
pp. 456-462 ◽  
Author(s):  
Bao Yan Wang ◽  
Xin Gang Wang ◽  
Li Sha Zhu ◽  
Hao Lu
Keyword(s):  
Robust Optimization ◽  
Design Theory ◽  
Optimization Design ◽  
Time Dependent ◽  
Model Combining ◽  
Reliability Sensitivity ◽  
Reliability Sensitivity Analysis ◽  
Sensitivity Analysis Method ◽  
Robust Optimization Design ◽  
Reliability Based Optimization

Time-dependent reliability sensitivity design is discussed based on time-dependent reliability model, combining reliability optimization design theory and time-dependent reliability sensitivity analysis method, a problem on time-dependent reliability-based robust optimization design of components structure is studied, and a numerical method for reliability-based robust optimization design is also presented. The time-dependent reliability sensitivity is added to the reliability-based optimization design model and the reliability-based robust optimization design is described as a multi-objection optimization.

The Research of Drilling Processing Technology Based on Fuzzy Optimization Design

2012 ◽  
Vol 217-219 ◽  
pp. 1547-1551
Author(s):  
Hui Xia Zhang ◽  
Hong Wei Zhan
Keyword(s):  
Design Theory ◽  
Optimization Design ◽  
Fuzzy Optimization ◽  
Optimization Theory ◽  
Processing Technique ◽  
Fuzzy Decision Making ◽  
Objective Functions ◽  
Fuzzy Decision ◽  
Controllable Factors ◽  
Design Ideas

Based on fuzzy optimization design ideas, system fuzzy decision-making theory and fuzzy optimization theory are adopted to conduct optimal design on the drilling processing technique of main pin hole of vehicle front shaft in this essay. By analyzing controllable factors and boundaries fuzziness, confirming objective functions, a satisfying result has been acquired, which indicates that fuzzy optimization design theory has good application foreground in drilling processing industry.

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