Analytical model for the air permeability of parachute fabric and structure parameters sensitivity analysis

2021 ◽  
pp. 1-8
Author(s):  
Shunchen Nie ◽  
Li Yu ◽  
Zhihong Sun ◽  
Zhuoheng Wu
Keyword(s):  
Sensitivity Analysis ◽  
Analytical Model ◽  
Air Permeability ◽  
Structure Parameters

Structure Sensitivity Analysis and Dynamic Performance Optimization of Marine Gearbox

2017 ◽  
Author(s):  
Tengjiao Lin ◽  
Daokun Xie ◽  
Ziran Tan ◽  
Bo Liu
Keyword(s):  
Sensitivity Analysis ◽  
Performance Optimization ◽  
Optimization Design ◽  
Dynamic Performance ◽  
Structure Sensitivity ◽  
Superposition Method ◽  
Structure Parameters ◽  
Analysis Model ◽  
Vibration Acceleration ◽  
Response Optimization

The aim of this paper is to investigate the influence of structure parameters on the vibration characteristics and improve the dynamic performance of marine gearbox. A finite element model was established to solve the dynamic response by using modal superposition method. Based on the theory of multi-objective optimization design, the structure sensitivity analysis model of marine gearbox was established, which takes the structure parameters of the housing as design variables. The modal and response sensitivity was obtained by using the optimal gradient method. According to the results of sensitivity analysis, a modal and response optimization model of marine gearbox was established. The objective was to avoid natural frequencies from the excitation frequencies and minimize the root mean square of vibration acceleration of the evaluating points on the surface of housing. Then the modal optimization and response optimization of gearbox were carried out by using zero-order and first-order optimization method. The results indicate that the dynamic optimization of the gearbox can be achieved. After optimization, the amplitude of vibration acceleration of the evaluating points on the housing surface has been reduced and the resonance of marine gearbox can be avoided.

Evaluating the Modern Airlines Maintenance Parts Supply Chain Reliability and Effectiveness

2018 ◽  
Vol 3 (03) ◽  
Author(s):  
Surya Lokesh Bhargav Pentakota ◽  
Pranusha Chalasani ◽  
Sai Krishna Mekala ◽  
Samuel I Okate
Keyword(s):  
Sensitivity Analysis ◽  
Supply Chain ◽  
Supply Chains ◽  
Inventory Control ◽  
Analytical Model ◽  
Cost Reduction ◽  
Contextual Analysis ◽  
Rfid System ◽  
Support Organizations ◽  
The Cost

The estimation of RFID in the support of supply chains of aircraft parts is of growing interest and is analyzed, especially in the proposed analytical model of this paper. This model helps us pick up a superior comprehension of the connections between different expenses brought about and the RFID impact on an aircraft support following procedure. Utilizing a RFID system, the company specialized in aircraft parts can accumulate savings. For this we need to consider that technology can remove inaccuracy in inventory delays brought about by mishandling in the component repair. This contextual analysis represents wonder through the utilization of numerical suppositions, highlighting the advantages of RFID. Furthermore, the estimation of RFID in aircraft maintenance is assessed utilizing sensitivity analysis, as per the parameters of the model of expense decreases in misusing repair parts and inventory control. The discoveries support the industry acceptance of RFID innovation, demonstrating that this is beneficial to support organizations of aircraft parts. Finally, in this paper we are considering the mishandling of the damaged parts of the air craft and also the cost reduction and the mishandling of the inventory parts. A sensitivity analysis is also carried out for the parameters that are used for the decrease in the utilizing the parts, cost reduction and the inventory control.

Embedded Electronics and Their effect on Wet Layup Substrates

2018 ◽  
Vol 2 (12) ◽  
Author(s):  
Billy Gray
Keyword(s):  
Sensitivity Analysis ◽  
Supply Chains ◽  
Inventory Control ◽  
Analytical Model ◽  
Cost Reduction ◽  
Contextual Analysis ◽  
Rfid System ◽  
Support Organizations ◽  
Embedded Electronics ◽  
The Cost

The estimation of RFID in the support of supply chains of aircraft parts is of growing interest and is analyzed, especially in the proposed analytical model of this paper. This model helps us pick up a superior comprehension of the connections between different expenses brought about and the RFID impact on an aircraft support following procedure. Utilizing a RFID system, the company specialized in aircraft parts can accumulate savings. For this we need to consider that technology can remove inaccuracy in inventory delays brought about by mishandling in the component repair. This contextual analysis represents wonder through the utilization of numerical suppositions, highlighting the advantages of RFID. Furthermore, the estimation of RFID in aircraft maintenance is assessed utilizing sensitivity analysis, as per the parameters of the model of expense decreases in misusing repair parts and inventory control. The discoveries support the industry acceptance of RFID innovation, demonstrating that this is beneficial to support organizations of aircraft parts. Finally, in this paper we are considering the mishandling of the damaged parts of the air craft and also the cost reduction and the mishandling of the inventory parts. A sensitivity analysis is also carried out for the parameters that are used for the decrease in the utilizing the parts, cost reduction and the inventory control.

Evaluating the Modern Airlines Maintenance Parts Supply Chain Reliability and Effectiveness

2018 ◽  
Vol 1 (01) ◽  
Author(s):  
Surya Lokesh Bhargav Pentakota ◽  
Pranusha Chalasani ◽  
Sai Krishna Mekala ◽  
Samuel I Okate
Keyword(s):  
Sensitivity Analysis ◽  
Supply Chain ◽  
Supply Chains ◽  
Inventory Control ◽  
Analytical Model ◽  
Cost Reduction ◽  
Contextual Analysis ◽  
Rfid System ◽  
Support Organizations ◽  
The Cost

The estimation of RFID in the support of supply chains of aircraft parts is of growing interest and is analyzed, especially in the proposed analytical model of this paper. This model helps us pick up a superior comprehension of the connections between different expenses brought about and the RFID impact on an aircraft support following procedure. Utilizing a RFID system, the company specialized in aircraft parts can accumulate savings. For this we need to consider that technology can remove inaccuracy in inventory delays brought about by mishandling in the component repair. This contextual analysis represents wonder through the utilization of numerical suppositions, highlighting the advantages of RFID. Furthermore, the estimation of RFID in aircraft maintenance is assessed utilizing sensitivity analysis, as per the parameters of the model of expense decreases in misusing repair parts and inventory control. The discoveries support the industry acceptance of RFID innovation, demonstrating that this is beneficial to support organizations of aircraft parts. Finally, in this paper we are considering the mishandling of the damaged parts of the air craft and also the cost reduction and the mishandling of the inventory parts. A sensitivity analysis is also carried out for the parameters that are used for the decrease in the utilizing the parts, cost reduction and the inventory control.

Evaluating the Modern Airlines Maintenance Parts Supply Chain Reliability and Effectiveness

2018 ◽  
Vol 2 (06) ◽  
Author(s):  
Surya Lokesh Bhargav Pentakota ◽  
Pranusha Chalasani ◽  
Sai Krishna Mekala ◽  
Samuel I Okate
Keyword(s):  
Sensitivity Analysis ◽  
Supply Chain ◽  
Supply Chains ◽  
Inventory Control ◽  
Analytical Model ◽  
Cost Reduction ◽  
Contextual Analysis ◽  
Rfid System ◽  
Support Organizations ◽  
The Cost

The estimation of RFID in the support of supply chains of aircraft parts is of growing interest and is analyzed, especially in the proposed analytical model of this paper. This model helps us pick up a superior comprehension of the connections between different expenses brought about and the RFID impact on an aircraft support following procedure. Utilizing a RFID system, the company specialized in aircraft parts can accumulate savings. For this we need to consider that technology can remove inaccuracy in inventory delays brought about by mishandling in the component repair. This contextual analysis represents wonder through the utilization of numerical suppositions, highlighting the advantages of RFID. Furthermore, the estimation of RFID in aircraft maintenance is assessed utilizing sensitivity analysis, as per the parameters of the model of expense decreases in misusing repair parts and inventory control. The discoveries support the industry acceptance of RFID innovation, demonstrating that this is beneficial to support organizations of aircraft parts. Finally, in this paper we are considering the mishandling of the damaged parts of the air craft and also the cost reduction and the mishandling of the inventory parts. A sensitivity analysis is also carried out for the parameters that are used for the decrease in the utilizing the parts, cost reduction and the inventory control.

Evaluating the Modern Airlines Maintenance Parts Supply Chain Reliability and Effectiveness

2018 ◽  
Vol 3 (07) ◽  
Author(s):  
Surya Lokesh Bhargav Pentakota ◽  
Pranusha Chalasani ◽  
Sai Krishna Mekala ◽  
Samuel I Okate
Keyword(s):  
Sensitivity Analysis ◽  
Supply Chain ◽  
Supply Chains ◽  
Inventory Control ◽  
Analytical Model ◽  
Cost Reduction ◽  
Contextual Analysis ◽  
Rfid System ◽  
Support Organizations ◽  
The Cost

The estimation of RFID in the support of supply chains of aircraft parts is of growing interest and is analyzed, especially in the proposed analytical model of this paper. This model helps us pick up a superior comprehension of the connections between different expenses brought about and the RFID impact on an aircraft support following procedure. Utilizing a RFID system, the company specialized in aircraft parts can accumulate savings. For this we need to consider that technology can remove inaccuracy in inventory delays brought about by mishandling in the component repair. This contextual analysis represents wonder through the utilization of numerical suppositions, highlighting the advantages of RFID. Furthermore, the estimation of RFID in aircraft maintenance is assessed utilizing sensitivity analysis, as per the parameters of the model of expense decreases in misusing repair parts and inventory control. The discoveries support the industry acceptance of RFID innovation, demonstrating that this is beneficial to support organizations of aircraft parts. Finally, in this paper we are considering the mishandling of the damaged parts of the air craft and also the cost reduction and the mishandling of the inventory parts. A sensitivity analysis is also carried out for the parameters that are used for the decrease in the utilizing the parts, cost reduction and the inventory control.

scholarly journals Analytical Model of Fluid Flow through Closed Structures for Vacuum Tube Systems

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Chan-Hee Park ◽  
Dae-Sung Cheon ◽  
Joonam Park
Keyword(s):  
Analytical Model ◽  
Technical Information ◽  
Air Permeability ◽  
Transportation Systems ◽  
Constant Thickness ◽  
Vacuum Tube ◽  
Practical Design ◽  
Flow Through ◽  
The Mathematical Model ◽  
Tube Structure

An analytical model is developed to evaluate airtightness, which is one of the most important requirements of vacuum tube transportation systems. The main objective of the model is to anticipate the pressure inside a closed structure, which initially decreases and then rises with time owing to the inflow of the air outside. The model is formulated by using Darcy’s law and by solving the differential equations that consider the air permeability of the material and physical configuration of the tube. Equations are derived for a tube section in two cases: one with constant thickness and another with variable thickness. Although the developed model must be verified experimentally, results simulated by using the model with several assumed sections were consistent with the findings of a previous study. The mathematical model developed here to predict the behavior of the pressure inside a vacuum tube structure could be effectively used to evaluate the airtightness of vacuum tube transportation systems. Such data could provide background technical information for the practical design of the system.

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