Stiffness Optimization for Springs in a Gun Cartridge Retaining Mechanism

2013 ◽  
Vol 385-386 ◽  
pp. 163-167
Author(s):  
Long Miao Chen ◽  
Lin Fang Qian ◽  
Rui Xue Zhao
Keyword(s):  
Optimization Design ◽  
Design Research ◽  
Simulation Analysis ◽  
Equations Of Motion ◽  
Parameters Optimization ◽  
Design Parameters ◽  
Evaluation Function ◽  
Spring Stiffness ◽  
Original Design ◽  
Design Variables

To prolong the life of cartridge retaining pawl and link stopper in a gun cartridge retaining Mechanism, three compression springs stiffness are reduced via design study and optimization design based on dynamic analysis. Presenting the load of shell on a typical stage while entering-bore, differential equations of motion in this mechanism are established. With translational velocity of shell as the design variable, a design research and simulation analysis are made. And the relationship between shell velocity and proper shell-feed is acquired. An evaluation function is built using springs stiffness with preference-selection. With this evaluation function as the optimum objective, spring stiffness as design variables, and proper shell-feed as constraint condition, the minimum of three spring stiffness is obtained after calculation. The results indicate that compared with the original design parameters optimization results, are significantly improved with the stiffness decreased separately by 20.27%, 11.99% and 6.86%.

Study of Parameters Optimization on Seismic Isolated Railway Bridges

2011 ◽  
Vol 50-51 ◽  
pp. 135-139
Author(s):  
Tie Yi Zhong ◽  
Chao Yi Xia ◽  
Feng Li Yang
Keyword(s):  
Optimal Design ◽  
Optimization Design ◽  
Seismic Isolation ◽  
Optimization Method ◽  
Relative Displacement ◽  
Parameters Optimization ◽  
Design Parameters ◽  
Isolation System ◽  
Railway Bridges ◽  
Design Variables

Based on optimization theories, considering soil-structure interaction and running safety, the optimal design model of the seismic isolation system with lead-rubber bearings (LRB) for a simply supported railway beam bridge is established by using the first order optimization method in ANSYS, which the parameters of the isolation bearing are taken as design variables and the maximum moments at the bottom of bridge piers are taken as objective functions. The optimal calculations are carried out under the excitation of three practical earthquake waves respectively. The research results show that the ratio of the stiffness after yielding to the stiffness before yielding has important effect on the structural seismic responses. Through the optimal analysis of isolated bridge system, the optimal design parameters of isolation bearing can be determined properly, and the seismic forces can be reduced maximally as meeting with the limits of relative displacement between pier top and beam, which provides efficient paths and beneficial references for dynamic optimization design of seismic isolated bridges.

Simulation Analysis and Optimization Design of Double-Wishbone Independent Suspension

2014 ◽  
Vol 541-542 ◽  
pp. 519-523 ◽  
Author(s):  
Xi Ting Wang ◽  
Yi Feng Zhao ◽  
Bin Jiao
Keyword(s):  
Optimal Design ◽  
Optimization Design ◽  
Simulation Analysis ◽  
Design Method ◽  
Design Parameters ◽  
Original Design ◽  
Development Environment ◽  
Kinematics Simulation ◽  
Wheel Alignment ◽  
Set Up

The parameter modeling for the front double-wishbone independent suspension of a vehicle is set up in the development environment of ADAMS, and then, the kinematics simulation analysis for original design parameters are processed. The contribution of design parameters to the sensitivity of the double-wishbone independent suspension is analyzed and the influence of design parameters on the performance of the suspension such as the wheel alignment parameters is investigated. The optimal design for the suspension is carried on by using the experiment design method, which not only realizes the requirement for good wheel alignment parameters, but also improves the sideways displacement of wheel obviously.

Structure Optimization Design for the Bed of Gear Hobbing Machine

2013 ◽  
Vol 765-767 ◽  
pp. 176-180
Author(s):  
Rong Chuang Zhang ◽  
Ao Xiang Liu ◽  
Jun Wang ◽  
Wan Shan Wang
Keyword(s):  
Optimization Design ◽  
Optimal Solution ◽  
Element Model ◽  
Weighting Coefficient ◽  
Design Parameters ◽  
Analytic Hierarchy ◽  
Design Variables ◽  
Gear Hobbing ◽  
Vibration Modal ◽  
Hierarchy Process

In the optimization design of the gear hobbing machine bed, the finite element model is build and the static analysis and vibration modal analysis are performed. Then sensitivity analysis is used to gain the main design parameters which influence the bed property most. Furthermore, the multi-objective optimization design of the bed is performed in ANSYS Workbench with these design parameters as the design variables. At last, after all optimum proposals are showed up, Analytic Hierarchy Process is used to determine the weighting coefficient, and the most optimal solution is found out. As a result, the dynamic and static performances of the machine bed are improved under control of the machine bed mass.

The Effect of Different Optimization Methods on Robustness for Robust Optimization Design

2014 ◽  
Vol 721 ◽  
pp. 464-467
Author(s):  
Tao Fu ◽  
Qin Zhong Gong ◽  
Da Zhen Wang
Keyword(s):  
Robust Optimization ◽  
Objective Function ◽  
Robust Design ◽  
Optimization Design ◽  
Optimization Methods ◽  
Optimization Method ◽  
Design Parameters ◽  
Hybrid Particle Swarm Optimization ◽  
Design Variables ◽  
Robust Optimization Design

In view of robustness of objective function and constraints in robust design, the method of maximum variation analysis is adopted to improve the robust design. In this method, firstly, we analyses the effect of uncertain factors in design variables and design parameters on the objective function and constraints, then calculate maximum variations of objective function and constraints. A two-level optimum mathematical model is constructed by adding the maximum variations to the original constraints. Different solving methods are used to solve the model to study the influence to robustness. As a demonstration, we apply our robust optimization method to an engineering example, the design of a machine tool spindle. The results show that, compared with other methods, this method of HPSO(hybrid particle swarm optimization) algorithm is superior on solving efficiency and solving results, and the constraint robustness and the objective robustness completely satisfy the requirement, revealing that excellent solving method can improve robustness.

Design Parameters Optimization of Cutting Head of Cantilever Roadheader Based on Genetic Algorithm

2012 ◽  
Vol 215-216 ◽  
pp. 193-196 ◽  
Author(s):  
Gang Liu ◽  
De Sen Mu ◽  
Shi Xi Duan ◽  
De Chao Song
Keyword(s):  
Genetic Algorithm ◽  
Kinetic Parameters ◽  
Optimization Design ◽  
Production Efficiency ◽  
Rock Strength ◽  
Cutting Parameters ◽  
Parameters Optimization ◽  
Design Parameters ◽  
Cutting Head ◽  
Cutting Parameters Optimization

For hard rocks whose protodyakonov scale of hardness f are greater than 8, research on the optimization design of cutting head of cantilever roadheader. Optimization model of the cutting head was established, in this model, the objective function was established based on dust mount, energy consumption and production efficiency. The design variables contain cutting head structural and kinetic parameters, the constraints are determined in accordance with working condition and practical experience. Cutting head parameters are optimized with parameters change related to rock strength, using genetic algorithm in Matlab7.0. A variety of cutting parameters optimization results related to rock strength are of great significance for the structural design of the cutting head and selection of kinetic parameters.

Structural Optimization Design of Flexible Anti-Collision Device for Bridge

2012 ◽  
Vol 201-202 ◽  
pp. 649-652
Author(s):  
Jun Liu ◽  
Yong Yang
Keyword(s):  
Finite Element ◽  
Geometric Structure ◽  
Optimization Design ◽  
Simulation Analysis ◽  
Flexural Rigidity ◽  
Simplified Model ◽  
Design Parameters ◽  
Theoretical Formula ◽  
Protection Device ◽  
Collision Process

Due to he complexity of the shipping collision process, the design of the protection device can not be accurately calculated by theoretical formula. Through the establishment of the anti-collision device in simplified model, this paper carries out the simulation analysis of the finite element values, and studies the key parameters that affects the performance of the anti-collision device: the geometric structure of inside and outside of steel, the combination of anti-collision circle (elastic element), the flexural rigidity of peripheral steel. And then we get the design parameters of the equivalent flexural rigidity of peripheral steel which is to ensure the that the peripheral steel won’t be partial collapse when there are some collision between some representative ships and it; and we also find that the appropriate increase in the flexural rigidity of around the vertex of the outer steel will improve the overall anti-collision ability of the anti-collision device.

Optimization Design of Cantilever Supporting Structure

2013 ◽  
Vol 357-360 ◽  
pp. 2410-2413
Author(s):  
Wei Xu ◽  
Jian Sheng Feng ◽  
Fei Fei Feng
Keyword(s):  
Genetic Algorithm ◽  
Optimization Design ◽  
Design Method ◽  
Optimal Solution ◽  
Optimization Method ◽  
Original Design ◽  
Supporting Structure ◽  
Primary Object ◽  
Design Variables ◽  
Optimum Solution

The primary object of this fundamental research is to reveal the application of genetic algorithm improved on the optimization design of cantilever supporting structure. In order to meet the strength of pile body and pile top displacement as well as design variables subjected to constraint, an algorithm is carried on to seek the optimum solution and relevant examples by means of comprehensively considering the effects on center-to-center spacing between piles,pile diameter and quantity of distributed steel, which is taken the lowest engineering cost as objective function. Through the comparison of the optimized scheme and original design, this fruitful work provides explanation to the effectiveness of genetic algorithm in optimization design. These findings of the research lead to the conclusion that the shortcomings of traditional design method is easy to fall into local optimal solution. The new optimization method can overcome this drawback.

Link Parameters Optimization Design of Quadruped-Imitating Walking Mechanism and its Simulation Analysis

2014 ◽  
Vol 685 ◽  
pp. 151-154
Author(s):  
Yong Ming Wang ◽  
Ying Qiu Sun
Keyword(s):  
Optimization Design ◽  
Simulation Analysis ◽  
Virtual Prototype ◽  
Parameters Optimization ◽  
Prototype Model ◽  
Interference Condition ◽  
Mechanism Optimization ◽  
Set Up ◽  
Walking Mechanism

According to the principle of double-half-revolution mechanism, a new kind of quadruped-imitating walking mechanism was designed. In order to simplify the structure of the walking mechanism, each links of the mechanism is driven directly by steering gear.Considering non-interference condition of each links and undulation requirement during movement, the constraint functions were established. In order to ensure the movement feasibility and reduce the undulation of the walking mechanism, optimization design for the size parameters of each links were completed by using Matlab optimization tool. The virtual prototype model of quadruped-imitating walking mechanism was set up in SolidWorks software, and the rationality of the optimization design was verified through the simulation analysis.

Design and Development of a Two-Axis Passive Line-of-Sight Stabilization System

1995 ◽  
Vol 117 (1) ◽  
pp. 173-179 ◽  
Author(s):  
A. N. Poo ◽  
C. L. Teo ◽  
M. K. Loh ◽  
S. L. Tay
Keyword(s):  
Optical Sensor ◽  
Equations Of Motion ◽  
Design Parameters ◽  
Line Of Sight ◽  
Stabilization System ◽  
Test Results ◽  
Initial Test ◽  
Original Design ◽  
Vibrational Response ◽  
Simulation Results

The line-of-sight (LOS) stabilization system is basically a system that has the capability of maintaining the sightline—for example, of an optical sensor—fixed in inertial space even when the system is subjected to an external vibrational environment. This paper examines and presents the feasibility of using a passive LOS stabilization system to maintain the sightline stability to within 1 mrad when it is subjected to linear and angular vibrations and other disturbances. Equations of motion of the system as well as the vibrational response equations are presented. From these equations, design parameters that affect the vibrational response of the system are established. A prototype of the LOS stabilization system has been built. The pointing stability of this prototype with different values of the design parameters is evaluated and compared with simulation results. Initial test results on the prototype are encouraging, with pointing stability of less than 1 mrad on both axes, which is within the original design objective.

Single Spur Gear Reducer Optimization Design Mathematical Modeling

2013 ◽  
Vol 273 ◽  
pp. 198-202
Author(s):  
Yu Xia Wang
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Optimal Design ◽  
Objective Function ◽  
Optimization Design ◽  
Spur Gear ◽  
Design Parameters ◽  
Constraint Function ◽  
Design Variables ◽  
The Mathematical Model

In a given power P, number of teeth than u, input speed and other technical conditions and requirements, find out a set of used a economic and technical indexes reach the optimal design parameters, realize the optimization design of the reducer, This paper determined unipolar standard spur gear reducer design optimization of the design variables, and then determine the objective function, determining constraint function, so as to establish the mathematical model.

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