Structure Topology Optimization Design and Shock Resistance Study on Nuclear Power Safety DCS Cast Aluminum Cabinet

Abstract Offshore floating nuclear power plant (FNPP) is characterized by its small and mobility, which is not only able to provide safe and efficient electric energy to remote islands, but to the oil and gas platforms. The safety digital control system (DCS) cabinet, as a carrier for the electronic devices, plays a significant role in ensuring the normal operation of the nuclear power plant. To satisfy the requirements of cabinet used in the sea environment, such as well rigidity, shock load resistance, good seal and corrosion resistance, etc, more and more attention is focused on the cast aluminum cabinet. However, the cast aluminum structure may cause larger weight of cabinet, which inevitability affects the mobility of cabinet, and increases the carried load of ship as well. Therefore, seeking for an effective approach to design a light weight cast aluminum cabinet for the offshore FNPP is definitely necessary. In this work, a frame of cast aluminum cabinet with lightweight is obtained successfully via structure topology optimization design, it is found that the weight of the frame can be reduced to 50% after optimization iterations. Subsequently, the natural frequency of the optimized cast aluminum cabinet is calculated by using ABAQUS, it is seen that the first mode frequency of the frame is beyond 30 Hz, which can meet the basic stiffness requirement. Accordingly, dynamic design analysis method (DDAM) is performed to verify the ability of the optimized cast aluminum cabinet in resisting sudden shock load, and the shock response characteristics of the cabinet are determined. Numerical results support that the optimized frame of cabinet possesses good resistance to high level shock. However, for the assembled cast aluminum cabinet, the vertical shock circumstance turns out to be the most critical condition, high stress and deformation regions occurs at the bracket and column. Reinforcements are proposed to make the bracket stiffer in this shock loading condition.

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The Optimization Design of Arm Bracket Structure Topology Based on ANSYS

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.834-836.1464 ◽

2013 ◽

Vol 834-836 ◽

pp. 1464-1469

Author(s):

Sheng Mei Luo ◽

Zhao Yang Niu ◽

Wei Liu ◽

Fu Fang Luo ◽

Jun Jun Jiang

Keyword(s):

Topology Optimization ◽

Optimization Design ◽

Optimal Topology ◽

Dimensional Model ◽

Structure Topology ◽

Change Mechanism ◽

Machining Center ◽

Automatic Tool Change ◽

Automatic Tool ◽

Ansys Workbench

The detail analysis proposal of the cylinder body is put forward for the automatic tool change mechanism of the QYJ-21 type horizontal machining center. It consists of three main aspects. Firstly, the dimensional model of the cylinders arm bracket portion will be created. Secondly, the topology optimization design of the arm bracket is implemented based on ANSYS Workbench. Finally, meeting the stiffness requirements, the optimal topology shape will be established, for it had the lightest weight.

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Topology Optimization Design of Pre-Stressed Plane Entity Steel Structure with the Constrains of Stress and Displacement

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.945-949.1216 ◽

2014 ◽

Vol 945-949 ◽

pp. 1216-1222 ◽

Cited By ~ 1

Author(s):

Li Yao ◽

Yun Xia Gao ◽

Hai Jun Yang

Keyword(s):

Topology Optimization ◽

Optimization Design ◽

Mechanical Performance ◽

Steel Structure ◽

Structural Topology ◽

Unit Size ◽

Structure Topology ◽

Design Variables ◽

Displacement Sensitivity ◽

Low Sensitivity

For the prestressed plane entitiy steel structure topology optimization design which design variables include the cable pretension value, unit size and the structural topology, the optimized mathematical model which objective function is the minimum structural weight is established with consideration of the constrains of stress and displacement. As for the solving method, firstly we need to determine the pretension applying to the cable according to full stress design and choose the unit size; then we need to conduct displacement sensitivity analysis to delete the low sensitivity unit to realize the structural topology optimization design. The example result is in conformity with the corresponding system of mechanical performance, and it indicates that the method proposed in this paper is effective.

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Method of Continuum Structural Topology Optimization with Information Functional Materials Based on K Nearest Neighbor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.321.200 ◽

2011 ◽

Vol 321 ◽

pp. 200-203

Author(s):

Jing Kui Li ◽

Yi Min Zhang

Keyword(s):

Topology Optimization ◽

Optimization Design ◽

Nearest Neighbor ◽

Functional Materials ◽

Structural Topology ◽

K Nearest Neighbor ◽

Original Design ◽

Structure Topology ◽

Unit Stress ◽

Information Functional

The KNN method is extracted from the technique of pattern recognition for the continuum structure topology optimization design with information functional materials. Original design region is taken as initial sample space, and continuum structure's units are regarded as samples. Unit stress and displacement sensitivity are utilized as feature vector to describe sample, and the feature vectors' Euclidean distance is considered as the recognition standard to classify all the samples. One FEM package is utilized to process the entire optimization. Finally, the topology optimization result is obtained. Several examples are verified under different situations. The results indicate that the KNN method is feasible.

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Structure Topology Optimization Design for Compression Box of Horizontal Preloading Domestic Waste Transfer Station

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.475-476.1382 ◽

2013 ◽

Vol 475-476 ◽

pp. 1382-1386

Author(s):

Hui Zhou ◽

Gang Yan Li ◽

Yuan Zhang ◽

Le Li

Keyword(s):

Topology Optimization ◽

Optimization Design ◽

Bottom Plate ◽

Structural Topology Optimization ◽

Structural Topology ◽

Domestic Waste ◽

Side Plate ◽

Structure Topology ◽

Transfer Station ◽

Waste Transfer

Horizontal preloading domestic waste transfer station is the core equipment for domestic waste disposal. Compression equipment is the elementary equipment of horizontal preloading domestic waste transfer station, which should be ensured its mechanical properties and structural lightweight. According to the compression box structure in this paper, structural topology optimization model is established. By using HyperWorks software, the result of structural topology optimization result of compression box is obtained. Based on the result of topology optimization, the structural improvement design model of compression box is established, and the number, location, size of strengthening rib for bottom plate, top plate, side plate are optimal designed so as to realize structural lightweight.

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Correlation Between Error Factors, Visual Perception, and Interface Layout — Taking Digital Instrument Control Equipment of Nuclear Power Safety Injection System as an Optimization Example

International Journal of Pattern Recognition and Artificial Intelligence ◽

10.1142/s0218001420550125 ◽

2019 ◽

Vol 34 (05) ◽

pp. 2055012

Author(s):

Xiaoli Wu ◽

Yan Chen

Keyword(s):

Visual Perception ◽

Nuclear Power ◽

Optimization Design ◽

Injection System ◽

Digital Instrument ◽

Control Equipment ◽

Calculation Results ◽

Instrument Control ◽

Weight Analysis ◽

Power Safety

One of the effective ways to improve task performance is to trace the sources of the task failures, that is, error factors, and take them into consideration for the optimization design of the system interactive interface. In this study, the digital instrument control equipment of a nuclear power safety injection system plant was taken as an example to construct an error factor–visual perception–interface layout (EF–VP–IL) correlation model. The visual perception intensity (VPI) levels in the functional sections of the interface were obtained by extracting the error factors and performing weight analysis on each functional section. A set of optimal solutions of the interface layout was obtained using the genetic algorithm, and the interface layout was optimized accordingly. The calculation results showed that the proposed method increased the visual communication index (VCI) of the original interface from [Formula: see text] to [Formula: see text] after optimization, which is an improvement of 23.36%.

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