Structure Sensitivity Analysis and Dynamic Performance Optimization of Marine Gearbox

Volume 10: 2017 ASME International Power Transmission and Gearing Conference ◽

10.1115/detc2017-67072 ◽

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.

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Dynamic optimization method with applications for machine tools based on approximation model

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406217711728 ◽

2017 ◽

Vol 232 (11) ◽

pp. 2009-2022 ◽

Cited By ~ 3

Author(s):

TJ Li ◽

XH Ding ◽

K Cheng ◽

T Wu

Keyword(s):

Machine Tool ◽

Performance Optimization ◽

Machine Tools ◽

Optimization Design ◽

Natural Frequencies ◽

Dynamic Performance ◽

Machining Process ◽

Machining Accuracy ◽

Approximation Model ◽

Dynamic Behaviors

Natural frequencies and modal shapes of machine tools have position-dependent characteristics owing to their dynamic behaviors changing with the positions of moving parts. It is time-consuming and difficult to evaluate the dynamic behaviors of machine tools and their machining accuracy at different positions. In this paper, a Kriging approximation model coupled with finite element method is proposed to substitute the dynamic equations for obtaining the position-dependent natural frequencies of a machine tool, as well as relative positions between the tool and the workpiece during the machining process. Based on the proposed method, dynamic performance optimization design of the machine tool is conducted under the condition of minimum relative positions. Three case studies are illustrated to demonstrate the implementation of the proposed method.

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Vibration Characteristic Optimization of Overhead Weapon Station Based on Dynamic Stability Concept

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.635-637.257 ◽

2014 ◽

Vol 635-637 ◽

pp. 257-260

Author(s):

Wei Dan ◽

Yong Liang Wu ◽

Yuan Lin ◽

Tao Hu

Keyword(s):

Sensitivity Analysis ◽

Dynamic Stability ◽

Optimization Design ◽

Reference Value ◽

Structure Parameters ◽

Vibration Characteristic ◽

Structural Modifications ◽

Vibration Parameters ◽

Station Structure ◽

Stability Concept

In view of poor accuracy of an overhead weapon station’s automatic firing, analyze the main vibration parameters affected the projectile dispersion, establish the vibration characteristic optimization model based on dynamic stability concept, and sensitivity analysis. Through optimization design of weapon station structure parameters, optimize the vibration characteristics and improve the accuracy of automatic firing. This method has certain reference value for structural modifications of the weapon station.

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

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.184-185.146 ◽

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 .

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A Study on Flange Lathe of Double-Tool Holder Based on Optimization Design Method of FE

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.48-49.118 ◽

2011 ◽

Vol 48-49 ◽

pp. 118-122

Author(s):

Fu Qiang Ying ◽

Yi Wang ◽

Ling Dong Wu ◽

Liang Yi Li

Keyword(s):

Sensitivity Analysis ◽

Optimization Design ◽

Natural Frequencies ◽

Design Method ◽

Dynamic Performance ◽

The Other ◽

Design Parameters ◽

Fe Model ◽

Tool Holder ◽

Dynamic Performances

With the optimization design method of FE,the FE model of vertical flange lathe beam of double-tool holder was established,the sensitivity analysis of dynamic performance for the machine tool was performed based on presented modal analysis and probability analysis.The influence rules of the first four natural frequencies affected by the design parameters of the lathe beam were confirmed and the weaknesses of it were indicated as well.Then, the structure of the lathe beam was optimized.As a result ,the dynamic performances of the lathe beam are improved and it offers the basis for the optimization design of the other lathe parts.

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The Robust Design of Four-Bar Linkage with Clearance Based on Sensitivity Analysis

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.34-35.1656 ◽

2010 ◽

Vol 34-35 ◽

pp. 1656-1660 ◽

Cited By ~ 1

Author(s):

Ying Cai Yuan ◽

Yi Lun Liu ◽

Yan Li

Keyword(s):

Sensitivity Analysis ◽

Mechanical System ◽

Robust Design ◽

Optimization Design ◽

Design Method ◽

Dynamic Performance ◽

Nonlinear Dynamic Model ◽

The Stability ◽

And Control ◽

Four Bar Linkage

Clearance is inevitable，so, with the increasing of machine’s speed, nonlinear vibration phenomenon caused by clearance is more apparent, which influences the precision and stability of mechanical system. For increasing the stability of mechanical system, a robust design method based on sensitivity analysis is studied, by using four-bar linkage as the research object, deducing the nonlinear dynamic model with clearance and the sensitivity of dynamic response, based on the rational planning to the tracks and control the sensitivities. In the design example, it shows that although the track deviation of robust design is slightly bigger than that of optimization design, the comprehensive dynamic performance of the mechanical system is much better than the latter, which means the stability of mechanical system is improved greatly. Thus, the robust design based on sensitivity analysis is an effective way to improve the stability of the mechanical system.

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

Journal of the Textile Institute ◽

10.1080/00405000.2021.1903744 ◽

2021 ◽

pp. 1-8

Author(s):

Shunchen Nie ◽

Li Yu ◽

Zhihong Sun ◽

Zhuoheng Wu

Keyword(s):

Sensitivity Analysis ◽

Analytical Model ◽

Air Permeability ◽

Structure Parameters

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Cost Benefit and Utility Decision Analysis of Turbinoplasty with Adenotonsillectomy for Pediatric Sleep-Disordered Breathing

Otolaryngology ◽

10.1177/0194599819841882 ◽

2019 ◽

Vol 161 (2) ◽

pp. 343-347 ◽

Cited By ~ 1

Author(s):

Grace Baik ◽

Scott E. Brietzke

Keyword(s):

Sensitivity Analysis ◽

Decision Analysis ◽

Sleep Disordered Breathing ◽

Treatment Success ◽

Cost Benefit ◽

Decision Analysis Model ◽

Analysis Model ◽

Baseline Model ◽

Turbinate Hypertrophy ◽

Disordered Breathing

Objectives Use decision analysis techniques to assess the potential utility gains/losses and costs of adding bilateral inferior turbinoplasty to tonsillectomy/adenoidectomy (T/A) for the treatment of obstructive sleep-disordered breathing (oSDB) in children. Use sensitivity analysis to explore the key variables in the scenario. Study Design Cost-utility decision analysis model. Setting Hypothetical cohort. Subjects and Methods Computer software (TreeAge Software, Williamstown, Massachusetts) was used to construct a decision analysis model. The model included the possibility of postoperative complications and persistent oSDB after surgery. Baseline clinical and quality-adjusted life year (QALY) parameters were estimated using published data. Cost data were estimated from Centers for Medicare and Medicaid 2018 databases ( www.cms.gov ). Sensitivity analyses were completed to assess for key model parameters. Results The utility analysis of the baseline model favored the addition of turbinoplasty (0.8890 vs 0.8875 overall utility) assuming turbinate hypertrophy was present. Sensitivity analysis indicated the treatment success increase (%) provided by concurrent turbinoplasty was the key parameter in the model. A treatment success increase of 3% of turbinoplasty was the threshold where concurrent turbinoplasty was favored over T/A alone. The incremental cost-effectiveness ratio (ICER) of $27,333/QALY for the baseline model was favorable to the willingness-to-pay threshold of $50,000 to $100,000/QALY for industrialized nations. Conclusions The addition of turbinoplasty for children with turbinate hypertrophy to T/A for the treatment of pediatric oSDB is beneficial from both a utility and cost-benefit analysis standpoint even if the benefits of turbinoplasty are relatively modest.

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A Simulation Model for Multi-Factor Sensitivity Analysis on Energy Demand

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.621.352 ◽

2012 ◽

Vol 621 ◽

pp. 352-355

Author(s):

Zhong Fu Tan ◽

Shu Xiang Wang ◽

Chen Zhang ◽

Li Qiong Lin ◽

Yin Hui Zhao

Keyword(s):

Sensitivity Analysis ◽

Energy Efficiency ◽

Regression Model ◽

Simulation Model ◽

Influencing Factors ◽

Energy Demand ◽

Analysis Model ◽

Demand Forecast ◽

Population Urbanization

This paper analyses multi influencing factors of energy demand, using energy demand forecast regression model reveals inner relations between each factor and energy demand. Establish simulation model of the relation between GDP, energy intense and energy demand. Under the change in population, urbanization and energy efficiency, this paper gives analysis model of energy demand change.

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