scholarly journals DNN-Based Surrogate Modeling-Based Feasible Performance Reliability Design Methodology for Aircraft Engine

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 229201-229218
Author(s):  
Dalu Cao ◽  
Guang-Chen Bai
Keyword(s):  
Design Methodology ◽  
Surrogate Modeling ◽  
Aircraft Engine ◽  
Reliability Design

An acoustic liner design methodology based on a statistical source model

2021 ◽  
pp. 1475472X2110238
Author(s):  
Douglas M Nark ◽  
Michael G Jones
Keyword(s):  
Design Methodology ◽  
Three Dimensional ◽  
Aircraft Engine ◽  
Flight Test ◽  
Source Model ◽  
Practical Implementation ◽  
Source Information ◽  
Fan Noise ◽  
Future Design ◽  
Acoustic Liner

The attenuation of fan tones remains an important aspect of fan noise reduction for high bypass ratio turbofan engines. However, as fan design considerations have evolved, the simultaneous reduction of broadband fan noise levels has gained interest. Advanced manufacturing techniques have also opened new possibilities for the practical implementation of broadband liner concepts. To effectively address these elements, practical acoustic liner design methodologies must provide the capability to efficiently predict the acoustic benefits of novel liner configurations. This paper describes such a methodology to design and evaluate multiple candidate liner configurations using realistic, three dimensional geometries for which minimal source information is available. The development of the design methodology has been guided by a series of studies culminating in the design and flight test of a low drag, broadband inlet liner. The excellent component and system noise benefits obtained in this test demonstrate the effectiveness of the broadband liner design process. They also illustrate the value of the approach in concurrently evaluating multiple liner designs and their application to various locations within the aircraft engine nacelle. Thus, the design methodology may be utilized with increased confidence to investigate novel liner configurations in future design studies.

Reliability design methodology for confined high pressure inflatable structures

2013 ◽  
Vol 51 ◽  
pp. 1-9 ◽  
Author(s):  
E.J. Barbero ◽  
E.M. Sosa ◽  
X. Martinez ◽  
J.M. Gutierrez
Keyword(s):  
High Pressure ◽  
Design Methodology ◽  
Inflatable Structures ◽  
Reliability Design

Study on Shock Resistance of MEMS Devices with Different Stoppers

2014 ◽  
Vol 609-610 ◽  
pp. 825-830 ◽  
Author(s):  
Tao Jiang ◽  
Yun Wei ◽  
Sai Yao ◽  
Jian Zhou
Keyword(s):  
Design Methodology ◽  
Design Method ◽  
Mems Devices ◽  
Dynamics Model ◽  
Reliability Design ◽  
Traditional Design ◽  
Sharp Stress ◽  
Shock Resistance ◽  
Mems Device ◽  
Shock Environment

The shock resistance of the MEMS device can be improved by simplifying its structure, but it will reduce accuracy. A commonly implemented solution that strengthens the shock resistance is the use of stopper. However, the collision between MEMS structure and stopper in shock environment may lead to the failure of the device. Hence, stopper should have a fine protection performance. In this study, the design method and principle of the MEMS device in the shock environment were analyzed. It was pointed out that the reliability design methodology of the MEMS device based on statics theory was insufficient. Next, the response of MEMS device to shock was studied and the shock dynamics model was established. Based on the model, the shock response of the traditional design and designs with different stoppers were analyzed. At last, experiments were carried out and the protection performance of different stoppers was evaluated. Results show that the use of stopper can obviously improve the shock resistance of the device. Elastic stopper can strengthen the shock resistance of the device greatly because of the excellent protection ability, while hard stopper may cause the emergence of the sharp stress wave.

Development of an aircraft systems dispatch reliability design methodology

2006 ◽  
Vol 110 (1108) ◽  
pp. 345-352 ◽  
Author(s):  
M. Bineid ◽  
J. P. Fielding
Keyword(s):  
Design Methodology ◽  
Systems Design ◽  
Aircraft Design ◽  
Design Stage ◽  
Component Level ◽  
Component Reliability ◽  
System Architectures ◽  
Reliability Design ◽  
Early Design Stage ◽  
Aircraft Systems

Abstract This paper describes the development of a generic aircraft systems dispatch reliability design methodology (ASDRDM) that has been developed for use during early phases of the aircraft systems design process. The methodology incorporates prediction of both reliability and maintainability through the aircraft design hierarchy, down to component level. It can be applied at the early design stage, but can also be used for advanced design phases and can use generic or actual failure rate and mean time to repair data. It allows designers to modify system architectures and component reliability and maintainability characteristics. The paper shows the validation that has been performed, and its use is demonstrated by a case-study.

Reversing Design Methodology of Ceramic Core for Hollow Turbine Blade Based on Measured Data

2014 ◽  
Author(s):  
Yangliu Dou ◽  
Fengjun Yan ◽  
Kun Bu
Keyword(s):  
Turbine Blade ◽  
Design Methodology ◽  
Design Method ◽  
Aircraft Engine ◽  
Ceramic Core ◽  
Modeling And Analysis ◽  
Shrinkage Ratio ◽  
Hollow Turbine Blade ◽  
Die Profile ◽  
Inverse Design Method

The precision of complex ceramic core is one of the essential factors for hollow turbine blade manufacturing, which has a significant impact on the development of the modern aircraft engine. In terms of the low precision of ceramic core formation, this paper proposes an approach through measuring the data from a group of ceramic cores, to study the computational methods for displacement field, deformational feature decoupling, and structural shrinkage ratio. Based on modeling and analysis of decoupled deformational features and the uneven structural shrinkage ratio, this paper proposes an inverse design method and optimizes the design of the die profile for ceramic core. The applicability of this method is validated using numerical simulation data and experimental results.

scholarly journals Intelligent Extremum Surrogate Modeling Framework for Dynamic Probabilistic Analysis of Complex Mechanism

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Jia-Qi Liu ◽  
Yun-Wen Feng ◽  
Xiao-Feng Xue ◽  
Cheng Lu
Keyword(s):  
Reliability Analysis ◽  
Probabilistic Analysis ◽  
Research Effort ◽  
Surrogate Modeling ◽  
Reliability Estimation ◽  
Complex Mechanism ◽  
Modeling Framework ◽  
Reliability Design ◽  
Steering Mechanism ◽  
Complex Mechanisms

The reliability analysis of complex mechanisms involves time-varying, high-nonlinearity, and multiparameters. The traditional way is to employ Monte Carlo (MC) simulation to achieve the reliability level, but this method consumes too much computing resources and is even computationally intractable. To improve the efficiency and accuracy of dynamic probabilistic analysis of complex mechanisms, an intelligent extremum surrogate modeling framework (IESMF, short for) is proposed based on extremum response surface method (ERSM), combined with artificial neural network (ANN) method and an improved optimize particle swarm optimization (PSO) method. Hereinto, the ERSM is used to simplify the dynamic process of output response to the extremum value of transient analysis; ANN is applied to establish a mathematical model between input variables and response, and the improved PSO method is utilized in search of initial weights and thresholds of the model. The effectiveness of the IESMF is demonstrated to perform the Rack-and-pinion steering mechanism (RPSM) reliability analysis. The results show that when the allowable value of gear root stress is equal to 850 MPa, the RPSM has a reliability degree of 0.9971. Through the validation process, it is illustrated that IESMF is accurate and efficient in dynamic probabilistic analysis of complex mechanisms, and its comprehensive performance is better than the MC method and ERSM. The research effort offers new ideas for the reliability estimation of a complex mechanism, thus enriching the method and theory of mechanical reliability design.

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