Conceptual Design of Suspension Bridges Based in Sensitivity Analysis of Flutter Speed

2001 ◽  
Author(s):  
J. Ángel Jurado ◽  
Santiago Hernández
Keyword(s):  
Sensitivity Analysis ◽  
Conceptual Design ◽  
Suspension Bridges ◽  
Flutter Speed

scholarly journals CONCEPTUAL DESIGN FOR ASSEMBLY IN AEROSPACE INDUSTRY: SENSITIVITY ANALYSIS OF MATHEMATICAL FRAMEWORK AND DESIGN PARAMETERS

2021 ◽  
Vol 1 ◽  
pp. 731-740
Author(s):  
Giovanni Formentini ◽  
Claudio Favi ◽  
Claude Cuiller ◽  
Pierre-Eric Dereux ◽  
Francois Bouissiere ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Conceptual Design ◽  
Design Parameters ◽  
Design For Assembly ◽  
Mathematical Framework ◽  
Commercial Aircraft ◽  
System Architectures ◽  
Complex Engineering ◽  
Aircraft System ◽  
Definition Of

AbstractOne of the most challenging activity in the engineering design process is the definition of a framework (model and parameters) for the characterization of specific processes such as installation and assembly. Aircraft system architectures are complex structures used to understand relation among elements (modules) inside an aircraft and its evaluation is one of the first activity since the conceptual design. The assessment of aircraft architectures, from the assembly perspective, requires parameter identification as well as the definition of the overall analysis framework (i.e., mathematical models, equations).The paper aims at the analysis of a mathematical framework (structure, equations and parameters) developed to assess the fit for assembly performances of aircraft system architectures by the mean of sensitivity analysis (One-Factor-At-Time method). The sensitivity analysis was performed on a complex engineering framework, i.e. the Conceptual Design for Assembly (CDfA) methodology, which is characterized by level, domains and attributes (parameters). A commercial aircraft cabin system was used as a case study to understand the use of different mathematical operators as well as the way to cluster attributes.

Optimizing tuned mass damper parameters to mitigate the torsional vibration of a suspension bridge under pulse-type ground motion: A sensitivity analysis

2019 ◽  
Vol 26 (11-12) ◽  
pp. 1054-1067 ◽  
Author(s):  
Seyyed Hossein Hossein Lavassani ◽  
Hamed Alizadeh ◽  
Peyman Homami
Keyword(s):  
Sensitivity Analysis ◽  
Torsional Vibration ◽  
Passive Control ◽  
Suspension Bridge ◽  
Tuned Mass Damper ◽  
Gyration Radius ◽  
Suspension Bridges ◽  
Torsional Mode ◽  
Mass Damper ◽  
Pulse Type

Suspension bridges are structures that because of their long span and high flexibility can be prone to ambient vibrations such as ground motions. They can experience high amplitude vibrations in torsional mode during an earthquake, where a vibration control strategy seems necessary. Recently, control systems have been widely used to mitigate vibration of structures. Tuned mass damper is a passive control system. Its performance and effectiveness have been verified both theoretically and practically. In this study, a tuned mass damper system is used to mitigate the torsional vibration of a suspension bridge. The Vincent Thomas suspension bridge is selected as a case study, and its response is reduced by a tuned mass damper under ten pulse-type records from 10 major worldwide earthquakes. By using sensitivity analysis, a parametric study is carried out to optimize tuned mass damper parameters, namely, mass ratio, gyration radius, tuning frequency, and damping ratio according to the maximum reduction of the response maxima. Finally, the optimum range of each parameter that can give the best performance and provide both operational and economic justification for the implementation of the project is suggested. The numerical results indicate that the optimized tuned mass damper system can substantially reduce the maximum response and vibration time.

Research on Limited Bearing Capacity Detection Method of Large Erection Equipment Operation Site

2012 ◽  
Vol 170-173 ◽  
pp. 3274-3279
Author(s):  
Hong Jie Cheng ◽  
Zhi Bo Qian ◽  
Yuan Zhao ◽  
Chuan Qiang Yu
Keyword(s):  
Sensitivity Analysis ◽  
Bearing Capacity ◽  
Conceptual Design ◽  
Detection Method ◽  
Weapon System ◽  
Fast Reaction ◽  
Equipment Operation ◽  
Bearing Load ◽  
Reaction Capability ◽  
Launching Site

To enhance the survival capability and fast reaction capability of missile weapon system, the research on choosing launching site during the process of missile erection has been carried out. In this paper, the bearing load of launching site is analyzed in missile erecting process, and the equation of limiting bearing capacity is deduced according to K. Terzaghi suggesting equation. Combining with explicit reliability analyzing method, the sensitivity analysis of factors which influence the bearing capacity has been executed, and the detection method has been researched for partial factors which influence bearing capacity obviously. Finally, the general conceptual design of evaluating bearing capacity and choosing launching site have been provided based on blocking design thought.

Simplified method for static analysis of bi-cable triple-pylon suspension bridges

2018 ◽  
Vol 22 (5) ◽  
pp. 1175-1185 ◽  
Author(s):  
Lijun Jia ◽  
Yu Jiang ◽  
Rucheng Xiao ◽  
Dong Xu
Keyword(s):  
Static Analysis ◽  
Conceptual Design ◽  
Analytical Solutions ◽  
Reference Value ◽  
Suspension Bridge ◽  
Suspension Bridges ◽  
Design Phase ◽  
Conceptual Design Phase ◽  
Simplified Method ◽  
Load Intensity

A bi-cable scheme of a triple-pylon suspension bridge can greatly decrease the unbalanced horizontal force on the top of mid-pylon and is more economical compared with a single-cable scheme. This article proposes an appropriate simplified method for static analysis of bi-cable triple-pylon suspension bridges in the conceptual design phase. First, theoretical analysis was performed considering the elastic extension of hangers. And the analytical solutions to cable extension under live-load, dead-load intensity, and the static characteristics were obtained. Second, verification of the accuracy of the analytical solutions was conducted by establishing FEM model of triple-pylon steel-box-girder suspension bridges with main spans from 1500 to 2500 m. The comparative analysis shows that the results of the analytical solutions are in good agreement with the Finite Element Models and of great reference value in the conceptual design phase.

Conceptual Design of Suspension Bridges: From Concept to Simulation

2016 ◽  
Vol 30 (4) ◽  
pp. 04015068 ◽  
Author(s):  
Namhee-Kim Hong ◽  
Hyun-Moo Koh ◽  
Sung-Gul Hong
Keyword(s):  
Conceptual Design ◽  
Suspension Bridges
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