scholarly journals Calculation justification for replacing the strengtheing agent of the composite hull of the catamaran type vessel

2020 ◽  
pp. 49-55
Author(s):  
М.В. Ховайко ◽  
А.О. Осипова ◽  
А.С. Немов
Keyword(s):  
Finite Element ◽  
Strength Analysis ◽  
Structural Elements ◽  
Element Analysis ◽  
Composite Body ◽  
Ship Hulls ◽  
Stiffness Characteristics ◽  
Strength And Stiffness ◽  
Analysis System ◽  
The Cost

Статья посвящена вопросам проектирования корпусов судов из полимерных композиционных материалов. В качестве объекта исследования рассматривается прототип судна-катамарана. Целью работы является модификация композитного корпуса прототипа, предполагающая замену армирующего элемента в композиционном материале с углеродных волокон на стеклянные в целях снижения стоимости конструкции. Основными задачами работы являются разработка модифицированной структуры элементов конструкции корпуса на основе анализа прочности, а также анализ экономической эффективности выполненной модификации. Анализ прочности композитных конструкций корпуса выполняется с помощью прямого конечно-элементного (КЭ) моделирования с применением системы КЭ анализа ANSYS Mechanical APDL. Расчётная методика основана на требованиях классификационных сообществ DNV GL и Российского морского регистра судоходства (РМРС). В результате работы на основе многовариантного конечно-элементного анализа выполнена модификация существующего проекта судна под материал с существенно отличающимися прочностными и жесткостными характеристиками при минимальном изменении геометрии корпусных элементов. Обоснована возможность уменьшения затрат на материал корпуса в 1.5-2- раза при незначительном увеличении водоизмещения и с условием обеспечения прочности корпуса в соответствии с требованиями международных и российских классификационных сообществ. The article is devoted to the issues of designing ship hulls from polymer composite materials. A prototype of a catamaran ship is considered as an object of research. The aim of the work is to modify the composite body of the prototype, which involves replacing the strengthening element in the composite material from carbon fibers to glass ones in order to reduce the cost of the structure. The main tasks of the work are the development of a modified structure of the hull structural elements based on the strength analysis, as well as the analysis of the economic efficiency of the modification. Strength analysis of composite hull structures is performed using direct finite element (FE) modeling using the ANSYS Mechanical APDL FE analysis system. The calculation method is based on the requirements of the classification associations (DNV GL) and the Russian Maritime Register of Shipping (RMRS). As a result of the work, on the basis of multivariate finite element analysis, the existing ship design has been modified for material with significantly different strength and stiffness characteristics with minimal changes in the geometry of the hull members. The possibility of reducing the cost of the hull material by 1.5-2 times with a slight increase in displacement and with the condition of ensuring the strength of the hull in accordance with the requirements of international and Russian classification associations has been substantiated.

scholarly journals Strength Analysis of the Truck Wheel Rim Robot Gripper

2021 ◽  
Vol 51 (1) ◽  
pp. 104-110
Author(s):  
Mindaugas Tiknis ◽  
Arturas Sabaliauskas
Keyword(s):  
Simulation System ◽  
Strength Analysis ◽  
Cad Model ◽  
Element Analysis ◽  
Robot Gripper ◽  
Wheel Rim ◽  
The Finite Element Analysis ◽  
Strength And Stiffness ◽  
Analysis System ◽  
Construction Optimization

This paper presents a study of the strength of the truck rim robot gripper structure using the finite element analysis system Solidworks Simulation. The developed CAD model of the gripper was adapted to the research by Solidworks Simulation system, which was used to evaluate the strength and stiffness of the structure. Construction optimization was performed, the obtained results were compared.

Finite Element Analysis of Static Characteristic for Gantry Crane

2012 ◽  
Vol 170-173 ◽  
pp. 3077-3080 ◽  
Author(s):  
Qing Dun Zeng ◽  
Qin E Li
Keyword(s):  
Finite Element ◽  
Metal Structure ◽  
Static Characteristic ◽  
Gantry Crane ◽  
Element Analysis ◽  
Before And After ◽  
Stiffness Characteristics ◽  
Strength And Stiffness ◽  
Reinforcement Measures ◽  
Gantry Cranes

The strength and stiffness characteristics are important parameters in the design of metal structure of gantry crane. In this paper, the modeling of a gantry crane before and after reconstruction was performed by using Finite Element Method, and the strength and static stiffness of the gantry crane were analyzed. The results show that the insufficient stiffness of the reconstructed gantry crane in the shaking direction causes its laterodeviation. A strengthened method was determined after comparison of four reinforcement measures. The present results can provide an importantly theoretical basis for the reconstruction or strengthening of gantry cranes.

Finite Element Analysis on Protective Airtight Doors of Mine Removable Rescue Capsule

2013 ◽  
Vol 341-342 ◽  
pp. 511-514
Author(s):  
De Gong Chang ◽  
Song Mei Li ◽  
Dong Hao Liu ◽  
Zhen Zhong Fei ◽  
Xin Jun Gao
Keyword(s):  
Finite Element ◽  
Design Research ◽  
Three Dimensional ◽  
Reference Value ◽  
Strength Analysis ◽  
Flat Panel ◽  
Element Analysis ◽  
Finite Element Software ◽  
Life Saving ◽  
Strength And Stiffness

In this paper, a cured door structure of mine rescue capsule is proposed, and compared with ordinary flat panel doors. Firstly two kind of three-dimensional solid models of mine removable protective airtight doors are established by the Pro/e software. And then take the advantage of the strength analysis of ANSYS finite element software to draw the stress and strain diagrams. The analysis results show that the strength and stiffness of the curved door is better than ordinary flat panel doors, which provide important theoretical basis and reference value on the design, research and dynamic analysis of the life-saving door.

scholarly journals Fatigue Strength Analysis on the Automobile Stabilizer Bar Based on ANSYS

2014 ◽  
Vol 8 (1) ◽  
pp. 619-623 ◽  
Author(s):  
Peng Zhang ◽  
Bao Xu ◽  
Shi Zhou ◽  
Le He
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Fatigue Strength ◽  
Simulation Analysis ◽  
Element Model ◽  
Strength Analysis ◽  
The Finite Element Method ◽  
Element Analysis ◽  
Strength And Stiffness ◽  
The Finite Element Model

Stabilizer bar is an important component of the vehicle’s independent suspension system and plays an important role in the safety traffic. Therefore, the research on fatigue strength characteristics of the automobile stabilizer bar is very important. In this paper, the finite element model is established for the automobile stabilizer bar by utilizing ANSYS finite element analysis software. The automobile stabilizer bar’s strength and stiffness are analyzed with the finite element method. It is ensured that the stabilizer bar meets the static strength requirements. At last, the fatigue simulation analysis is carried out. The simulation results illustrate that the fatigue life of the stabilizer bar is about 673400 times and that it meets the fatigue life requirements which must be at least 500000 times in the fatigue test of the stabilizer bar.

The Rod Force Law Analysis of 600MW Air Cooling Tower

2014 ◽  
Vol 945-949 ◽  
pp. 1135-1138
Author(s):  
Tao Liang ◽  
Chun Ling Meng ◽  
Yang Li ◽  
Xiu Hua Zhao
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Axial Force ◽  
Optimization Design ◽  
Cooling Tower ◽  
Air Cooling ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
The Cost

The finite element analysis of large air cooling tower was carried out using ABAQUS. On the basis of strength above,8 types of the axial force are analyzed and summarized, find valuable rules, and put forward the further optimization design. So that it can satisfy the strength and stability of air cooling tower, the structure is more reasonable, reduce weight, reduce the cost.

Standardized Foundations Database for Combat Systems

2014 ◽  
Author(s):  
M. Harbison ◽  
W. Koon ◽  
V. Smith ◽  
P. Haymon ◽  
D. Niole ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cost Savings ◽  
Ship Design ◽  
Separate Analysis ◽  
Element Analysis ◽  
Weapon Systems ◽  
System Requirements ◽  
Design Requirements ◽  
The Cost

As a result of enhanced performance and mission requirements for Navy ships, ship design has dramatically increased the use of higher strength, lightweight steels and various local reinforcements, e.g., deck inserts, ring stiffeners, etc., in foundation designs to satisfy the design requirements for supporting machinery, consoles, and weapon systems among others. In additional to operational loading requirements, most of these foundations must also be designed to satisfy shock, vibration and other combat system requirements. While the same piece of equipment may be used in other ship contracts, the foundations are uniquely designed and require a separate analysis and drawing package. Computer modeling and Finite Element Analysis (FEA) have helped reduce the labor required to analyze foundations, but the high number of “unique” foundations as well as changes which necessitate a new analysis still create a large workload for engineers. This is further compounded by increased costs in production due to greater numbers of unique parts and materials that must be marked, stored, and retrieved later for fabrication. This goal of this project was to determine the cost-savings potential of leveraging past foundations work in designing, analyzing, and drawing foundations in the future. By the project’s conclusion Ingalls will have created a database for rapid access to previously-generated foundation information, the framework of which will be publicly available for all shipyards to populate with their own foundation information.

Finite Element Analysis of Drilling Frame on Down-the-Hole Drill Based on Mechanical Mechanics and Mechanical Properties

2014 ◽  
Vol 908 ◽  
pp. 282-286
Author(s):  
Wan Rong Wu ◽  
Lin Chen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Working Condition ◽  
Slenderness Ratio ◽  
Stress And Strain ◽  
Limit States ◽  
Element Analysis ◽  
Practical Engineering ◽  
Structure Strength ◽  
Strength And Stiffness

Drilling frame on TD165CH Down-The-Hole Drill that has large slenderness ratio and be longer than 10m is one component of Down-The-Hole drill which is mainly subjected to load.In the process of drilling, drilling frame is not only subjected to loads which are like tensile, compression and torsion and so on, and be under the influence of impacting and vibration of impactor,the situation of force is complicated.By analysing of working condition of Down-The-Hole drill,there get all kinds of limit states of typical working conditions, and then using Ansys doing finite element analysis, there get distribution of the stress and strain of drilling frame and the result of modal analysis to check whether drilling frame meets the requirements of strength and stiffness or not,and whether it is possible to resonate with the impactor or not.By analysis,Structure strength and stiffness of drilling Frame on TD165CH Down-The-Hole drill meet the requirements of practical engineering, and drilling Frame does not resonate with the impactor.

scholarly journals Nonlinear Axial Stiffness Characteristics of Axisymmetric Bolted Joints

1990 ◽  
Vol 112 (3) ◽  
pp. 442-449 ◽  
Author(s):  
I. R. Grosse ◽  
L. D. Mitchell
Keyword(s):  
Finite Element ◽  
Linear Theory ◽  
Design Theory ◽  
Joint Stiffness ◽  
Bolted Joints ◽  
Axial Stiffness ◽  
Outer Diameter ◽  
Bolted Joint ◽  
Element Analysis ◽  
Stiffness Characteristics

A critical assessment of the current design theory for bolted joints which is based on a linear, one-dimensional stiffness analysis is presented. A detailed nonlinear finite element analysis of a bolted joint conforming to ANSI standards was performed. The finite element results revealed that the joint stiffness is highly dependent on the magnitude of the applied load. The joint stiffness changes continuously from extremely high for small applied loads to the bolt stiffness during large applied loads, contrary to the constant joint stiffness of the linear theory. The linear theory is shown to be inadequate in characterizing the joint stiffness. The significance of the results in terms of the failure of bolted joints is discussed. A number of sensitivity studies were carried out to assess the effect of various parameters on the axial joint stiffness. The results revealed that bending and rotation of the joint members, interfacial friction, and the bolt/nut threading significantly influence the axial stiffness characteristics of the bolted joint. The two-dimensional, axisymmetric finite element model includes bilinear gap elements to model the interfaces. Special orthotropic elements were used to model the bolt/nut thread interaction. A free-body-diagram approach was taken by applying loads to the outer diameter of the joint model which correspond to internal, uniformly distributed line-shear and line-moment loads in the joint. A number of convergence studies were performed to validate the solution.

Optimization Design of Tank Structure for Semi-Trailers

2011 ◽  
Vol 199-200 ◽  
pp. 1175-1179
Author(s):  
Shuang Zhao ◽  
Jing Gang Wang ◽  
Li Li Dai ◽  
Ya Qiong Deng ◽  
Jiao Miao
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dynamic Characteristic ◽  
Structural Property ◽  
Optimization Design ◽  
Operational Effectiveness ◽  
Element Analysis ◽  
The Cost

The research is conducted on the tank of semi-trailers which is made of steel by using the method of Finite Element Analysis. The optimized result indicated that the mass of the tank structure reduced by 9% on the premise that the intensity and the rigidity request of structural property is satisfied, and the dynamic characteristic also meets the requirement. It is the foundation to reduce the cost of manufacture and improve the operational effectiveness of user.

Weight and configuration optimization of the launcher pod using finite element analysis

2021 ◽  
pp. 154851292110675
Author(s):  
Mithilesh Kumar Dewangan ◽  
S K Panigrahi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dynamic Loads ◽  
Initial Weight ◽  
Configuration Optimization ◽  
Element Analysis ◽  
Critical Location ◽  
Strength And Stiffness ◽  
The Given ◽  
Modification Of Materials

This paper deals with the stress analysis of the launcher pod based on optimization of its configuration and weight without compromising its strength and stiffness. The launcher pod assembly is a complex fabricated structure, which is subjected to a variety of dynamic loads during firing of rockets. A series of finite element simulations reveal the critical location of the pod for different loading conditions based on the stress magnitude, which helps to optimize its weight and configuration of the launcher pod. It has been observed that the optimized weight of the given launcher pod after modification of materials and configuration, with the provided materials, loading, and boundary conditions, is reduced by 36.27% (without launcher tubes and rockets) against the initial weight of the launcher pod.

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