Research on Electromagnetic Catapult-Oriented Permanent Magnet Linear Synchronous Motor

2012 ◽  
Vol 490-495 ◽  
pp. 509-513
Author(s):  
Ji Zhu Liu ◽  
Ming Chong Sun ◽  
Tao Chen ◽  
Ming Qiang Pan
Keyword(s):  
Finite Element ◽  
Theoretical Analysis ◽  
High Speed ◽  
High Efficiency ◽  
Thrust Force ◽  
Structural Parameters ◽  
Finite Element Analyses ◽  
Aircraft Carrier ◽  
Technical Requirements ◽  
Designing Method

Compared with steam catapult device, electromagnetic catapult device has high catapult energy, low system weight, high efficiency etc., so electromagnetic catapult makes an important developing direction for the aircraft carrier catapult. According to the technical requirements of electromagnetic catapult, the paper analyses the factors that affect the efficiency of electromagnetic catapult, proposes the method of using slotting PMLSM in low-speed segment and non-slotting PMLSM in high-speed segment to drive, which improves the systematic efficiency of the catapult process. The paper designs a structure of PMLSM assembled by stator modules. Also researches on PMLSM using the designing method of finite element, analyses the structural parameters the influences have on the thrust force of slotting and non-slotting motor, presents the optimal motor structural parameters, and at last proves the correctness of the theoretical analysis through experiment.

Design of a 33-Knot Aluminum Catamaran Ferry

2000 ◽  
Vol 37 (02) ◽  
pp. 88-99
Author(s):  
R. G. Latorre ◽  
P. D. Herrington
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
High Speed ◽  
Frame Structure ◽  
Test Results ◽  
Finite Element Analyses ◽  
The Finite Element Method ◽  
Floating Frame ◽  
Good Agreement ◽  
Panel Design

This paper presents the results of an investigation on the suitability of using hull panels with alternating fixed and floating frames for a 30–40 knot aluminum catamaran ferry. A prototype 4.6 m × 1.8 m bottom hull panel with alternating frames is analyzed numerically and physically tested. The corresponding finite-element analyses and test results are in good agreement. The results show that the floating frame hull panel design is a feasible structure for an aluminum catamaran. The floating frame structure was then used for a 33-knot, 250-passenger aluminum catamaran ferry designed to meet the ABS High Speed Craft rules. A midship section of the catamaran hull was analyzed using the finite-element method. Catamaran weight estimates, heave and pitch motions, and powering estimates are also provided. The results show that the alternating floating frame structure was within the ABS rules stress allowables.

The Structural Analysis and Rapid Optimization for High-Speed Spindle Box

2011 ◽  
Vol 199-200 ◽  
pp. 1269-1272
Author(s):  
Huai Xing Wen ◽  
Lu Jun
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Structural Analysis ◽  
Optimal Design ◽  
Design Process ◽  
High Speed ◽  
Structural Parameters ◽  
The Finite Element Method ◽  
Target Setting ◽  
Fuzzy Constraints

Through the optimization of the design process, the application of the finite element method and the structural parameters design have avoided blindness of product design, reduced unnecessary waste, waste of material and time for example. The fuzzy constraints has been determined by the sensitivity calculation , and the use numerical method and procedures of chart to analyze and compare, the target setting in the specified range has been searched for the structure. Thus the optimal design got achieved.

Simulation Analysis of a Novel Magnetic Gear

2012 ◽  
Vol 490-495 ◽  
pp. 2614-2618
Author(s):  
Yong Kui Man ◽  
Wen Sheng Hao ◽  
Yi Sheng Zhang ◽  
Shuo Zhang ◽  
Jun Feng Zhang ◽  
...  
Keyword(s):  
Finite Element ◽  
High Speed ◽  
High Efficiency ◽  
Simulation Analysis ◽  
Peak Torque ◽  
The Novel ◽  
Finite Element Software ◽  
Overload Protection ◽  
Efficient Performance ◽  
Magnetic Gear

Compared with mechanical gear, permanent magnetic gear has unique advantages which are high efficiency, noise free, zero friction, vibrationless, overload protection, etc. This paper introduced a novel coaxial magnetic gear with high speed radio and analyzed the efficient performance including peak torque, starting, braking, and no-loading procedures on the basis of calculating in finite element software Ansoft. The results prove that the novel magnetic gear is reasonable and efficient.

Finite Element Mechanical Analysis of Cushion Seals in High Speed Pneumatic Cylinder

2013 ◽  
Vol 275-277 ◽  
pp. 44-50
Author(s):  
Ri Hong Zhang ◽  
Jun Xia Shi ◽  
Ji Wen Hu
Keyword(s):  
Finite Element ◽  
High Speed ◽  
Material Selection ◽  
Structural Parameters ◽  
Reference Value ◽  
Dynamic Contact ◽  
Mechanical Analysis ◽  
Working Fluid ◽  
Pneumatic Cylinder ◽  
Element Analysis

The design of pneumatic cylinder seals is in accordance with the theory of fluid elastic tight seal. The sealing mechanism depends on the contact force which is created by the interference of initial elastic seal assembly and the sealing force which is created by the working fluid acting on the elastomeric material. In the high-speed pneumatic cylinder, the buffer structure enables the piston decelerates rapidly and stops stably. When the buffer stage begins, it will produce a strong dynamic contact between the cushion seals and the cushion spear. After the failure of cushion seals happen，the buffering capacity will be declined sharply. Therefore, the mechanical properties analysis of the cushion seals becomes very important. The material characteristics and the magnitude of interference of the cushion seals as well as the operating speed of the cylinder piston have a large impact on the life of the cushion seals. In this paper, based on the finite element analysis software ABAQUS, it provides certain reference value for the cushion seals material selection and structural parameters.

Puncture Needle Production Process Intelligent Control System Based on Machine Vision

2011 ◽  
Vol 311-313 ◽  
pp. 826-829
Author(s):  
Ju Bao Qu
Keyword(s):  
Control System ◽  
Machine Vision ◽  
Production Process ◽  
High Speed ◽  
High Efficiency ◽  
Support Vector ◽  
Work Piece ◽  
Real Time Control ◽  
Technical Requirements ◽  
Intelligent Detection

For the international New invention, that orbital lumbar joint puncture unique technology, Studied and developed intelligent detection and control system of the needle production process based on machine vision. Through the high speed camera gain image of work piece , uses the multi-wavelet transform pre-and double-cubic interpolation to enlarge the image, using least squares support vector machine workpiece quality intelligent detection and identification, according to the process parameters to obtain real-time control of the production process. Experiments show that this system can meet technical requirements, good stability, high efficiency, has a higher value.

scholarly journals Research on a Special Scarifier Mechanism with Finite Element Analysis Method

2012 ◽  
Vol 433-440 ◽  
pp. 1044-1051
Author(s):  
Jian Dong Jiang ◽  
Willem Hoogmoed ◽  
Guo Xing Tao ◽  
Jie Gao ◽  
Xian Zhang
Keyword(s):  
Finite Element ◽  
High Speed ◽  
Structural Parameters ◽  
Cutting Speed ◽  
Sph Method ◽  
Element Analysis ◽  
High Speed Cutting ◽  
Orthogonal Experiments ◽  
Soil Cutting ◽  
Working Efficiency

A scarifier mechanism with rotary tillage and anti-rotary grubbing is proposed for inducing the power of tillage in hardens soil. MAT147 material modal is amended by experimental method and soil high-speed cutting finite element modal is build through SPH method, further, the tools parameter of proposed mechanism and soil cutting speed are studied by FEA numerical simulation through orthogonal experiments method. Finally, the result shows that the proposed mechanism with proper structural parameters and work speeds can reduce the requirement of power of tillage and increase the working efficiency of small agricultural machinery.

Dynamic Impact Upon Steel Target Plate: Experimental and Theoretical Analysis

1995 ◽  
Author(s):  
Y. F. Al-Obaid
Keyword(s):  
Finite Element ◽  
Theoretical Analysis ◽  
Three Dimensional ◽  
Complete Analysis ◽  
Impact Loads ◽  
Finite Element Analyses ◽  
Target Plate ◽  
Dynamic Impact ◽  
Dynamic Finite Element ◽  
Steel Target

Abstract This paper gives complete analysis of the local failure of steel target plate subjected to shot impact by using three-dimensional dynamic finite element analyses in which provision is made for the simulation of impact loads, plasticity and cracking of steel target. An assessment is made for perforation. Three computer programmes NONSAP, MARC and OBAID have been used for comparison. The analytical results are well compared with those available from a model test.

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