scholarly journals APPLICATION OF THE METAHEURISTIC TUNICATE SWARM ALGORITHM IN SOLVING APPLIED MECHANICS PROBLEMS

2021 ◽  
Vol 24 (2) ◽  
pp. 31-34
Author(s):  
Mladen Krstić ◽  
◽  
Branislav Milenković ◽  
Đorđe Jovanović ◽  
◽  
...  
Keyword(s):  
Cantilever Beam ◽  
Three Dimensional ◽  
Metaheuristic Algorithm ◽  
Applied Mechanics ◽  
Comparison Of Results ◽  
Swarm Behavior ◽  
Speed Reducer ◽  
Swarm Algorithm

In this paper, the principles of a metaheuristic algorithm based on tunicate swarm behavior are shown. The Tunicate Swarm Algorithm (TSA for short) was used for solving problems in applied mechanics (speed reducer, cantilever beam and three-dimensional beam optimization). In the end, a comparison of results obtained by TSA and results obtained by other methods is given.

scholarly journals Marine predators' algorithm: Application in applied mechanics

Tehnika ◽  
2021 ◽  
Vol 76 (5) ◽  
pp. 613-620
Author(s):  
Branislav Milenković ◽  
Mladen Krstić
Keyword(s):  
Cantilever Beam ◽  
Pressure Vessel ◽  
Optimization Problems ◽  
Applied Mechanics ◽  
Software Suite ◽  
Marine Predators ◽  
Engineering Problems ◽  
Speed Reducer

In this paper we will demonstrate how Marine Predators Algorithm (MPA for short) can be used for solving certain optimization problems in applied mechanics. In the first part, biological fundamentals, as well as method explanation are given. Afterwards, MPA algorithm and its ' applicability is explained in detail. The pseudo code for this algorithm was written using Matlab R2019a software suite. This algorithm can be used for optimization o f engineering problems, such as: pressure vessel optimization, cantilever beam optimization, cone clutch optimization and speed reducer optimization. In the end, all the results for the fore mentioned problems, as well as a result comparison with other methods are shown.

Dynamic simulation of wind field in three-dimensional display space considering particle swarm algorithm fuzzy logic

2021 ◽  
pp. 1-6
Author(s):  
Honglei Xu ◽  
Linhuan Wang
Keyword(s):  
Fuzzy Logic ◽  
Dynamic Simulation ◽  
Wind Field ◽  
Three Dimensional ◽  
Measurement Data ◽  
Particle Swarm ◽  
Particle Swarm Algorithm ◽  
Three Dimensional Display ◽  
Swarm Algorithm ◽  
Synchronous Measurement

In order to improve the accuracy of dynamic detection of wind field in the three-dimensional display space, system software is carried out on the actual scene and corresponding airborne radar observation information data, and the particle swarm algorithm fuzzy logic algorithm is introduced into the wind field dynamic simulation process in three-dimensional display space, to analyze the error of the filtering result in detail, to process the hurricane Lily Doppler radar measurement data with the optimal adaptive filtering according to the error data. The three-dimensional wind field synchronous measurement data obtained by filtering was compared with three-dimensional wind field synchronous measurement data of the GPS dropsonde in this experiment, the sea surface wind field measurement data of the multi-band microwave radiometer, and the wind field data at aircraft altitude.

An Adaptive Response Surface Methodology Based on Active Subspaces for Mixed Random and Interval Uncertainties

2019 ◽  
Vol 4 (2) ◽  
Author(s):  
Xingzhi Hu ◽  
Yanhui Duan ◽  
Ruili Wang ◽  
Xiao Liang ◽  
Jiangtao Chen
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Estimation Error ◽  
Three Dimensional ◽  
Nonlinear Function ◽  
Response Analysis ◽  
Dynamic Correlation ◽  
Interval Uncertainties ◽  
Speed Reducer ◽  
Active Subspaces

Abstract The popular use of response surface methodology (RSM) accelerates the solutions of parameter identification and response analysis issues. However, accurate RSM models subject to aleatory and epistemic uncertainties are still challenging to construct, especially for multidimensional inputs, which is widely existed in real-world problems. In this study, an adaptive interval response surface methodology (AIRSM) based on extended active subspaces is proposed for mixed random and interval uncertainties. Based on the idea of subspace dimension reduction, extended active subspaces are given for mixed uncertainties, and interval active variable representation is derived for the construction of AIRSM. A weighted response surface strategy is introduced and tested for predicting the accurate boundary. Moreover, an interval dynamic correlation index is defined, and significance check and cross validation are reformulated in active subspaces to evaluate the AIRSM. The effectiveness of AIRSM is demonstrated on two test examples: three-dimensional nonlinear function and speed reducer design. They both possess a dominant one-dimensional active subspace with small estimation error, and the accuracy of AIRSM is verified by comparing with full-dimensional Monte Carlo simulates, thus providing a potential template for tackling high-dimensional problems involving mixed aleatory and interval uncertainties.

Three Dimensional Cosserat Continuum Model and its Application to Analysis for the Cantilever Beam

2011 ◽  
Vol 117-119 ◽  
pp. 438-442
Author(s):  
Hong Xiang Tang ◽  
Zhao Long Hu
Keyword(s):  
Cantilever Beam ◽  
Continuum Model ◽  
Three Dimensional ◽  
Continuum Theory ◽  
Intrinsic Property ◽  
Cosserat Continuum ◽  
Internal Length ◽  
Cosserat Continuum Theory ◽  
Finite Element Formulations ◽  
Cosserat Continuum Model

A basic 3D Cosserat continuum theory and corresponding finite element formulations are deduced. The deflections of a cantilever beam are analyzed by the 20-nodes solid elements based on the classical continuum theory and Cosserat continuum theory respectively. Compared with analytical solution brought forward by Timoshenko and Goodier, it illustrates that the numerical results based on Coseerat FEM are effective and more accurate and closer to the analytical solutions by choosing an appropriate value of the characteristic internal length, which also testifies the capability of reflecting the intrinsic property of the cantilever beam.

scholarly journals Optimizing the Cargo Location Assignment of Retail E-Commerce Based on an Artificial Fish Swarm Algorithm

2020 ◽  
Vol 2020 ◽  
pp. 1-14 ◽  
Author(s):  
Shuiwang Zhang ◽  
Linping Fu ◽  
Rong Chen ◽  
Yu Mei
Keyword(s):  
Location Problem ◽  
Three Dimensional ◽  
Retrieval Time ◽  
Artificial Fish Swarm Algorithm ◽  
Efficient Storage ◽  
Artificial Fish Swarm ◽  
Output Efficiency ◽  
Location Assignment ◽  
Swarm Algorithm ◽  
The Mathematical Model

An efficient storage strategy for retail e-commerce warehousing is important for minimizing the order retrieval time to improve the warehouse-output efficiency. In this paper, we consider a model and algorithm to solve the cargo location problem in a retail e-commerce warehouse. The problem is abstracted into storing cargo on three-dimensional shelves, and the mathematical model is built considering three objectives: efficiency, stability, and classification. An artificial swarm algorithm is designed to solve the proposed models. Computational experiments performed on a warehouse show that the proposed approach is effective at solving the cargo location assignment problem and is significant for the operation and organization of a retail e-commerce warehouse.

Finite Element Analysis of Beam-Column Connection with Cantilever Beam Splicing

2013 ◽  
Vol 838-841 ◽  
pp. 540-544 ◽  
Author(s):  
Jian Rong Pan ◽  
Zhan Wang ◽  
Lin Qiang Zheng ◽  
Zheng Ting Yang
Keyword(s):  
Finite Element ◽  
Cantilever Beam ◽  
Welded Joint ◽  
Three Dimensional ◽  
Element Model ◽  
Rotational Stiffness ◽  
Element Analysis ◽  
Moment Resisting Frame ◽  
Moment Resisting ◽  
Three Dimensional Finite Element

Beam-column connection with cantilever beam bolted-splicing is also known as the joint of column-tree moment-resisting frame. The study is still relatively small for the semi-rigid behavior and rotational stiffness of the joint. This paper deal with four specimens of the joints with cantilever beam splicing and four specimens of the welded joints by using three dimensional finite element model analysis. The strain, stress, yield and ultimate loads, yield and ultimate deformations had been compared between the joint with cantilever beam splicing and the welded joint. The analysis results show that, when the splicing area of the joint with cantilever beam splicing was designed more strongly, the stress distribution, the load-displacement curves in elastic working stage, and the initial rotational stiffness are good agreement between the joint with cantilever beam splicing and the welded joint. The hysteresis curves of the joint with cantilever beam splicing were inverse S-shaped, indicating that there was greater slipping deformation because of bolt splicing. The welded joint had no slipping phenomenon.

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