Experimental Study on Ultimate Strength of Novel Aluminum Alloy Stiffened Panel With Floating Girder

2021 ◽  
Author(s):  
Kun Sun ◽  
Genglin Zhang ◽  
Ling Zhu ◽  
Liang Xu ◽  
Kailing Guo ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Ultimate Strength ◽  
Uniaxial Compression ◽  
High Speed ◽  
High Performance ◽  
Rapid Development ◽  
Stiffened Panel ◽  
The Novel ◽  
Novel Structure ◽  
Collapse Behavior

Abstract With the rapid development of high-speed craft, the novel aluminum alloy stiffened panel with floating girder is widely used to achieve light weight ship hull for economic and high performance. While the mechanical properties of this novel structure are rarely studied. In order to investigate the differences of ultimate strength and collapse behavior between the novel aluminum stiffened panel with floating girder and fixed girder, the uniaxial compression experiments of novel aluminum stiffened panel with floating girder and fixed girder were conducted. Test apparatus were designed to accomplish simply supported boundary condition, then the uniaxial compression experiments were performed, eventually the ultimate strength and collapse behavior of different panels were analyzed. The results of the experiments show that the ultimate strength of novel aluminum stiffened panel with floating girder is higher than the panel with fixed girder under uniaxial compression, which means this type of novel aluminum alloy stiffened panel with floating girder applied on the high-speed craft can improve the ultimate strength of the vessel. Furthermore, it was witnessed that the collapse mode of stiffened panel with fixed girder is tripping of web while that of floating panel is bucking of girder.

The Effect of Equal-Channel Angular Extrusion to the Cast Aluminum Alloy Materials

2012 ◽  
Vol 203 ◽  
pp. 281-285
Author(s):  
Guo Ping Zhang
Keyword(s):  
Aluminum Alloy ◽  
High Speed ◽  
High Performance ◽  
Equal Channel Angular Extrusion ◽  
Rapid Development ◽  
Solid Solution Hardening ◽  
Modern World ◽  
High Tech ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum

With the rapid development of modern world aerospace science and technology, hi-tech weaponry and high-speed transportation tools, industrial production and high-tech equipment manufacturers have increasingly urgent demand for high-performance metal materials. The cast aluminum is a new aluminum alloy series developed by foundry industry recently. Because it does not need the solid solution hardening process and has good mechanical properties, it's loved by the manufacturing sector. This paper targets at channel angular deformation direction to study the cast aluminum tissue material .

Buckling/Ultimate Strength Evaluation for Continuous Stiffened Panel Under Combined Shear and Thrust

2016 ◽  
Author(s):  
Hiroaki Ogawa ◽  
Tomoki Takami ◽  
Akira Tatsumi ◽  
Yoshiteru Tanaka ◽  
Shinichi Hirakawa ◽  
...  
Keyword(s):  
Ultimate Strength ◽  
Fem Analysis ◽  
Strength Analysis ◽  
Stiffened Panel ◽  
Fe Modeling ◽  
Test Results ◽  
Strength Evaluation ◽  
Shear Buckling ◽  
Collapse Behavior ◽  
Good Agreement

In this study, FE modeling method for the buckling/ultimate strength analysis of a continuous stiffened panel under combined shear and thrust is proposed. In order to validate the proposed method, shear buckling collapse tests of a stiffened panel and FEM analysis are carried out. As the result of these, it is confirmed that the buckling collapse behavior and the ultimate strength estimated by the proposed method are in good agreement with the test results.

Numerical Investigation of Ultimate Strength of Stiffened Plates With Various Cross-Section Forms

2018 ◽  
Author(s):  
Huilong Ren ◽  
Yifu Liu ◽  
Chenfeng Li ◽  
Xin Zhang ◽  
Zhaonian Wu
Keyword(s):  
Aluminum Alloy ◽  
Ultimate Strength ◽  
Cross Section ◽  
High Performance ◽  
Lightweight Design ◽  
Offshore Structures ◽  
Stiffened Plates ◽  
Stiffened Plate ◽  
Element Analysis ◽  
Hull Structure

There is an increasing interest in the lightweight design of ship and offshore structures, more specifically, choosing aluminum alloys or other lightweight high-performance materials to build structure components and ship equipments. Due to its better mechanical properties and easy assembly nature, extruded aluminum alloy stiffened plates are widely used in hull structures. When the load on the hull reaches a certain level during sailing, partial or overall instability of stiffened plate makes significant contribution in an event of collapse of the hull structure. It is very necessary to investigate the ultimate strength of aluminum alloy stiffened plate to ensure the ultimate bearing capacity of large aluminum alloy hull structure. Most of studies of the ultimate strength of stiffened plates deal with stiffened plates with T–shaped stiffeners. Stiffeners of other shapes have seldom been explored. In this research, the ultimate strength of six different cross–section aluminum alloy stiffened plates and one steel stiffened plate was studied based on the non–linear finite element analysis (FEA). Taking into account stiffness, weight and other issues, the new cross–section aluminum stiffener has finally been concluded for replacing the original steel stiffener in upper deck of a warship.

Design of a Digital Audio Player Based on μc/Os and μc/GUI

2013 ◽  
Vol 462-463 ◽  
pp. 650-653
Author(s):  
Shao Yuan Li
Keyword(s):  
High Speed ◽  
High Performance ◽  
Rapid Development ◽  
Digital Audio ◽  
Embedded Operating System ◽  
Audio Processing ◽  
Audio Technology ◽  
Machine Interface ◽  
Audio Decoder ◽  
Sd Card

At present, with the rapid development of digital audio technology, high speed and high performance digital audio processing technology faces an important issue. This paper proposes and designs a digital audio player combined with digital audio and embedded systems two cutting-edge technology. Hardware circuitry takes STM32F103VE as the main controller, configurated with VS1003 audio decoder chip and the corresponding SD card storage module, LCD module, power supply module and so on; software design transplants embedded operating system μC / OS. This paper takes advantage of μC/GUI to design audio player graphical user interface, improves the human-machine interface friendliness and aesthetics greatly.

scholarly journals High-Performance Tracking for Piezoelectric Actuators Using Super-Twisting Algorithm Based on Artificial Neural Networks

Mathematics ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 244
Author(s):  
Cristian Napole ◽  
Oscar Barambones ◽  
Mohamed Derbeli ◽  
Isidro Calvo ◽  
Mohammed Yousri Silaa ◽  
...  
Keyword(s):  
Neural Networks ◽  
Artificial Neural Networks ◽  
High Performance ◽  
Piezoelectric Actuators ◽  
The Novel ◽  
Tracking Accuracy ◽  
Novel Structure ◽  
Novel Approach ◽  
Artificial Neural ◽  
Twisting Algorithm

Piezoelectric actuators (PEA) are frequently employed in applications where nano-Micr-odisplacement is required because of their high-precision performance. However, the positioning is affected substantially by the hysteresis which resembles in an nonlinear effect. In addition, hysteresis mathematical models own deficiencies that can influence on the reference following performance. The objective of this study was to enhance the tracking accuracy of a commercial PEA stack actuator with the implementation of a novel approach which consists in the use of a Super-Twisting Algorithm (STA) combined with artificial neural networks (ANN). A Lyapunov stability proof is bestowed to explain the theoretical solution. Experimental results of the proposed method were compared with a proportional-integral-derivative (PID) controller. The outcomes in a real PEA reported that the novel structure is stable as it was proved theoretically, and the experiments provided a significant error reduction in contrast with the PID.

Improving Energy-Efficiency of Computational Grids via Scheduling

2011 ◽  
pp. 1836-1857
Author(s):  
Ziliang Zong ◽  
Xiaojun Ruan ◽  
Adam Manzanares ◽  
Kiranmai Bellam ◽  
Xiao Qin
Keyword(s):  
Energy Efficiency ◽  
Energy Conservation ◽  
Grid Computing ◽  
Energy Efficient ◽  
High Speed ◽  
High Performance ◽  
Large Scale ◽  
Rapid Development ◽  
Computational Grids ◽  
Grid Architecture

High performance Grid platforms and parallel computing technologies are experiencing their golden age because of the convergence of four critical momentums: high performance microprocessors, high-speed networks, free middleware tools, and highly increased needs of computing capability. We are witnessing the rapid development of computational Grid technologies. Dozens of exciting Grid infrastructures and projects like Grid-tech, Grid Portals, Grid Fora, and Commercial Grid Initiatives are being built all over the world. However, the fast growing power consumption of data centers has caused serious concerns for building more large-scale supercomputers, clusters, and Grids. Therefore, designing energy-efficient computational Grids to make them economically attractive and environmentally friendly for parallel applications becomes highly desirable. Unfortunately, most previous studies in Grid computing primarily focus on the improvement of performance, security, and reliability, while completely ignoring the energy conservation issue. To address this problem, we propose a general architecture for building energy-efficient computational Grids and discuss the potential possibilities for incorporating power-aware techniques to different layers of the proposed Grid architecture. In this chapter, we first provide necessary background on computational Grids, Grid computing, and parallel scheduling. Next, we illustrate the general Grid architecture and explain the functionality of different layers. Followed by that, we discuss the design and implementation details of applying the energy-efficient job-scheduling technique, which is called Communication Energy Conservation Scheduling (or CECS for short), to computational Grids. Finally, we present extensive simulation results to prove the improvement of energy-efficiency of computational Grids.

The Design and Implementation of Parallel Algorithm Accelerator Based on CPU-GPU Collaborative Computing Environment

2012 ◽  
Vol 529 ◽  
pp. 408-412 ◽  
Author(s):  
Fan Yang ◽  
Tong Nian Shi ◽  
Han Chu ◽  
Kun Wang
Keyword(s):  
High Speed ◽  
High Performance ◽  
Programming Model ◽  
Rapid Development ◽  
Collaborative Computing ◽  
Computing Environment ◽  
Internet Applications ◽  
Rich Internet Applications ◽  
Mixed Programming ◽  
Performance Results

With the rapid development of GPU in recent years, CPU-GPU collaborative computing has become an important technique in scientific research. In this paper, we introduce a cluster system design which based on CPU-GPU collaborative computing environment. This system is based on Intel Embedded Star Platform, and we expand a Computing-Node for it by connecting to high-speed network. Through OpenMP and MPI mixed programming, we integrate different algorithms meeting with the scientific computing and application computing by Master/Worker model and a software system which is based on RIA (Rich Internet Applications). In order to achieve high performance, we used a combination of software and hardware technology. The performance results show that the programs built with hybrid programming model have good performance and scalability.

Feature-Based Online Representation Algorithm for Streaming Time Series Similarity Search

2019 ◽  
Vol 34 (05) ◽  
pp. 2050010 ◽  
Author(s):  
Peng Zhan ◽  
Changchang Sun ◽  
Yupeng Hu ◽  
Wei Luo ◽  
Jiecai Zheng ◽  
...  
Keyword(s):  
Time Series ◽  
Big Data ◽  
Similarity Search ◽  
High Speed ◽  
High Performance ◽  
Time Series Data ◽  
Rapid Development ◽  
Feature Representation ◽  
Series Data ◽  
Data Points

With the rapid development of information technology, we have already access to the era of big data. Time series is a sequence of data points associated with numerical values and successive timestamps. Time series not only has the traditional big data features, but also can be continuously generated in a high speed. Therefore, it is very time- and resource-consuming to directly apply the traditional time series similarity search methods on the raw time series data. In this paper, we propose a novel online segmenting algorithm for streaming time series, which has a relatively high performance on feature representation and similarity search. Extensive experimental results on different typical time series datasets have demonstrated the superiority of our method.

scholarly journals Design of New High-Performance Full Adder Using Hybrid-CMOS Logic Style for High-Speed Applications

2015 ◽  
Vol 37 ◽  
pp. 285 ◽  
Author(s):  
Milad Jalalian Abbasi Morad ◽  
Seyyed Reza Talebiyan ◽  
Ebrahim Pakniyat
Keyword(s):  
Power Supply ◽  
High Speed ◽  
High Performance ◽  
Full Adder ◽  
Propagation Delay ◽  
Novel Structure ◽  
Hybrid Cmos ◽  
Simulation Results ◽  
Power Delay Product

This paper, presents a new design for 1-bit full adder cell using hybrid-CMOS logic style. Using a novel structure for implementation of the proposed full adder caused it has better performance in terms of propagation delay and power-delay product (PDP) compared to its counterparts. According to the simulation results, the propagation delay of the proposed full adder is 22.8% less than the propagation delay of next fastest full adder, and the power-delay product of the proposed full adder is 22.7% less than the next best PDP. HSpice simulations using 65nm technology with a power supply of 1.2V was utilized to evaluate the performance of the circuits.

A Simple Design Formula to Estimate the Ultimate Strength of Stiffened Panels Under Bi-Axial Compression Mainly in Transverse Direction

2018 ◽  
Author(s):  
Yusuke Komoriyama ◽  
Daisuke Yanagihara
Keyword(s):  
Ultimate Strength ◽  
Axial Compression ◽  
Transverse Direction ◽  
Yield Condition ◽  
Stiffened Panel ◽  
Simple Design ◽  
Buckling Mode ◽  
Stiffened Panels ◽  
Design Formula ◽  
Collapse Behavior

Most of stiffened panels subjected to bi-axial compression mainly in transverse direction collapse with the buckling deformation of one times one half-wave in a local panel between longitudinal stiffeners and transverse frames. The authors defined this collapse mode as “local panel buckling mode”. In this study, the collapse behavior of the stiffened panel with local panel buckling mode is investigated in detail. Then, a simple design formula to estimate ultimate strength of a stiffened panel with local panel buckling mode is derived based on the collapse behavior. This formula is composed of a formula to predict the ultimate strength of a rectangular unstiffened panel subjected to uniaxial transverse compression, and the effects of stiffeners, bi-axial compression and von Mises yield condition are added to the formula. The ultimate strength calculated by the proposed formula is in good agreement with FEA results. Finally, the proposed formula is compared with an existing method and formulae used in the CSR-OT, CSR-BC and H-CSR. As a result, it is confirmed that the proposed formula has sufficient accuracy and high availability.

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