scholarly journals Structural Parameters Optimization for a Proportional Solenoid

2020 ◽  
Vol 19 (4) ◽  
pp. 689-700
Author(s):  
Y. X. Yu ◽  
S. D. Ke ◽  
K. D. Jin
Keyword(s):  
Electromagnetic Force ◽  
Structural Parameters ◽  
Finite Element Method Simulation ◽  
Optimization Method ◽  
Parameters Optimization ◽  
Parameter Sensitivity Analysis ◽  
3D Finite Element ◽  
Simulation Results ◽  
3D Finite Element Method ◽  
Force Displacement

This paper presents an optimization method for the structural parameters of a proportional solenoid. The 3D finite element method simulation model for performance analyse of proportional solenoid was validated by force-displacement characteristic experiment. Parameter sensitivity analysis results showed that the displacement of the armature, the length of the armature, the radius of the armature, the width of the first half of the sleeve and the angle of the magnetic-isolated ring have significant effects on the electromagnetic force. Key structural parameters were optimized according to the simulation results. Experiments results showed the average electromagnetic force was increased by 20.1 % and the effective stroke was extended to 2.1 mm.

Auditory startle disrupts speech coordination

2021 ◽  
Vol 47 (2) ◽  
pp. 167-183
Author(s):  
Chenhao Chiu ◽  
Bryan Gick
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Human Body ◽  
Biomechanical Model ◽  
Induced Responses ◽  
3D Finite Element ◽  
Jaw Opening ◽  
Simulation Results ◽  
Temporal Interaction ◽  
3D Finite Element Method

Abstract Speech production requires temporal coordination between the actions of different functional groupings of muscles in the human body. Crucially, such functionally organized units, or “modules”, may be susceptible to disruption by an external stimulus such as a startling auditory stimulus (SAS; >120dB), enabling a possible window into the internal structure of learned speech movements. Following on the observation that SAS is known to accelerate the release of pre-planned actions, the current study examines lip kinematics in SAS-induced responses during speech movements to test whether this accelerated release applies on the scale of entire syllables or on the scale of smaller functional units. Production measures show that SAS-elicited bilabial movements in [ba] syllables are prone to disruption as measured by discontinuity in velocity profiles. We use a 3D finite element method (FEM) biomechanical model to simulate the temporal interaction between muscle groupings in speech. Simulation results indicate that this discontinuity can be accounted for as an instance of temporally decoupled coordination across neuromuscular modules. In such instances, the muscle groupings controlling lip compression and jaw opening, which normally fire sequentially, appear more likely to be activated synchronously.

Structural Parameters Optimization of Excavator Working Device Based on Mining Process

2011 ◽  
Vol 421 ◽  
pp. 759-763 ◽  
Author(s):  
Tian Zhong Sui ◽  
Lei Wang ◽  
Zhen Tan ◽  
Pei Chao Jia
Keyword(s):  
System Theory ◽  
Structural Parameters ◽  
Optimization Method ◽  
Original Model ◽  
Parameters Optimization ◽  
Structure Parameter ◽  
Multi Objective Optimization ◽  
Complex Optimization ◽  
The Mind ◽  
Working Device

With a view to the whole digging process, a multi-objective optimization model based on digging process is established. Applying the mind of system theory and complex optimization method, taking model P&H2800XP excavator for example, the structure parameter optimization of its working device is accomplished. The rational parameters obtained from this. Comparing with an original model, optimized results are ideal comparatively and the performance is improved.

Calibration response simulation of a triaxial induction tool with a metal mandrel

Geophysics ◽  
2016 ◽  
Vol 81 (4) ◽  
pp. D419-D425 ◽  
Author(s):  
Wei Xu ◽  
Shizhen Ke ◽  
Chengfang Yin ◽  
Ming Jiang ◽  
Liangang Ma ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Azimuthal Angle ◽  
Simulation Method ◽  
Quantitative Agreement ◽  
3D Finite Element ◽  
Induction Logging ◽  
Simulation Results ◽  
Large Water ◽  
3D Finite Element Method ◽  
Water Tanks

The calibration of triaxial induction logging tools is commonly performed in large water tanks, which are costly and complicated to use. In contrast, calibration with a metal loop is relatively economical and convenient. A tilted metal loop is introduced to calibrate all the components of a triaxial induction tool simultaneously. We have evaluated and optimized parameters such as radius, resistance, azimuthal angle, and position of the calibration loop with the 3D finite-element method. For validation, the accuracy of the simulation method is verified with analytical solutions with consideration of the metal mandrel effect. A quantitative agreement is found between the simulation results and the measurements of a realistic triaxial induction tool with a metal mandrel. Numerical simulation results demonstrate that the presence of the metal mandrel causes the nine components of the tool to change nonlinearly with the formation conductivities in the double logarithmic coordinate. This nonlinear effect can be reduced by eliminating the background signals from the metal mandrel. After the optimization of the parameters of the calibration loop, the responses of the triaxial induction tool can be calibrated accurately.

A Kind of Optimization Method on Plate-Shell Structures with Stiffeners

2015 ◽  
Vol 723 ◽  
pp. 234-239
Author(s):  
Jian Kang Li ◽  
Kai Ma
Keyword(s):  
Strain Energy Density ◽  
Present Method ◽  
Strain Energy ◽  
Structural Parameters ◽  
Optimization Method ◽  
Layout Optimization ◽  
Computational Effort ◽  
Parameters Optimization ◽  
Shell Structures ◽  
Powell Method

An new optimization method which combines layout optimization of stiffeners with structural parameters optimization of structures is discussed. The first step is to optimize the layout of stiffenerser, then the structural parameters were optimized. In layout optimization of stiffeners, the strain energy density sensitivities of the elements were used to determine which elements of stiffeners should be deleted. In structural parameters optimization, the object function and the constraint functions were approximated by the second-order Taylor expansion. DFP (Davidon, Fletcher and Powell) method was presented to solve optimal problem. In order to reduce computational effort, the combined approximation (CA) method was used to reanalysis and update the displacements and stresses of the structure. The present method was applied to a bunker. The numerical results show that the optimization method was effective for optimization of plate-shell structure with stiffeners, and it could be to implement on a computer.

Parameters Optimization Method for Hot Forming Panels Based on the Crashworthiness and Lightweight

2013 ◽  
Vol 327 ◽  
pp. 318-321
Author(s):  
Ping Hu ◽  
Kan Hu
Keyword(s):  
Structural Parameters ◽  
Parametric Method ◽  
Optimization Method ◽  
The Body ◽  
Parameters Optimization ◽  
Hot Forming ◽  
Optimized Design ◽  
Forming Technology ◽  
Car Crash ◽  
Design Variables

This paper studies the parameters optimization of the hot forming panels based on the crashworthiness and lightweight. Combined with hot forming technology, it takes the key structural parameters as the design variables, the positive / bias crashworthiness as the constraint condition, the lightweight body as the design objective, studies the vehicle frontal crash safety. According to the final optimized design, a real car crash tests had been completed and the excellent results shown that the parametric method based on the vehicle crashworthiness is an important guarantee methods to achieve the body structure optimized design.

Study on Parameter Optimization Based on Workspace of 3-DOF Parallel Machine Tool

2010 ◽  
Vol 29-32 ◽  
pp. 2247-2250
Author(s):  
Xing Shan Li ◽  
Guang Qi Cai
Keyword(s):  
Machine Tool ◽  
Parameter Optimization ◽  
Optimization Model ◽  
Explicit Solution ◽  
Structural Parameters ◽  
Optimization Method ◽  
Parallel Machine ◽  
Parameters Optimization ◽  
Workspace Analysis ◽  
Parallel Machine Tool

This paper proposes an optimization method which makes the structural parameters are minimum and the workspace is maximum based on 3-DOF parallel machine tool. By analysis the conditions of boundary, parameters optimization model is built and gives out the explicit solution of dexterous workspace. Analysis the effect of structural parameters on workspace. The results show the workspace is a unsingularity space.

scholarly journals DESIGN AND EXPERIMENT OF ADJUSTABLE SOCKET-WHEEL PRECISION FERTILIZER APPARATUS FOR DRY DIRECT-SEEDING RICE

2021 ◽  
pp. 121-130
Author(s):  
Liu Jun ◽  
Zhu Dequan ◽  
Tai Qilei ◽  
Yu Congyang ◽  
Wang Tingjue ◽  
...  
Keyword(s):  
Coefficient Of Variation ◽  
Rotation Speed ◽  
Structural Parameters ◽  
Organic Fertilizer ◽  
Basic Structure ◽  
Optimization Method ◽  
Direct Seeding ◽  
Bench Test ◽  
Simulation Results ◽  
Precision Hole

To solve problems of non-adjustable fertilizer and low fertilization precision in the precision hole fertilization of dry direct-seeding rice, an adjustable socket-wheel precision hole fertilizer apparatus for rice was designed. The basic structure and working principle of the fertilizer apparatus were expounded, the structural parameters of key components were determined. The numerical simulation experiments based on the discrete element method were carried out by using sulfurized urea as the research object. Selecting the rotation speed of the socket-wheel, the length of the trough, the depth of the socket as the experimental factors, and taking the average amount of fertilizer discharging and the coefficient of variation of fertilization uniformity as evaluation indicators, the orthogonal rotation combined experiments with three factors and five levels were carried out. A multi-objective optimization method was used to determine the best parameter combination under the constraint of the target value of the hole fertilizer discharging of 1.500 g. The simulation results show that the coefficient of variation of fertilizer uniformity was the smallest and the coefficient of variation was 15.80% when the rotation speed of socket-wheel was 26.57 r/min, the length of the trough was 5.36 mm and the depth of socket was 5.64 mm. By using slow-release urea, sulfurized urea and bio-organic fertilizer as test materials, the bench test and field test was carried out on the fertilizer apparatus and the reliability of the simulation results and the adaptability of the fertilizer apparatus were verified.

Simulation of Multi-Pass ECAP by 3D Finite Element Method

2010 ◽  
Vol 667-669 ◽  
pp. 115-120 ◽  
Author(s):  
Li Bao ◽  
Hua Ding ◽  
Wen Juan Zhao ◽  
Rui Bin Mei
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Uniform Distribution ◽  
Equivalent Strain ◽  
3D Finite Element ◽  
Ecap Process ◽  
Load Increase ◽  
Simulation Results ◽  
3D Finite Element Method ◽  
Element Method

Multi-pass ECAP process of pure Al for square samples (Φ＝90º, Ψ＝37º, pressing speed of 1mm/s), was simulated by using 3D finite element method (FEM).The distribution of equivalent strain for two and four passes was compared. The results showed that route A leads to non-uniform distribution of equivalent strain during multi-pass ECAP. The distribution of equivalent strain is uniform in BC route, but the value of equivalent strain is larger in C route. The simulation results were compared with the experimental ones with previous work in the literature. The simulation also shows that equivalent strain and load increase with pass increasing.

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