The Finite Element Analysis of a Shipyard's Lifting Eye with Load

2013 ◽  
Vol 631-632 ◽  
pp. 1006-1010
Author(s):  
Shao Fen Lin ◽  
Zhao Yi Zhu
Keyword(s):  
Finite Element ◽  
Working Conditions ◽  
High Reliability ◽  
Strength Analysis ◽  
Bearing Surface ◽  
Calculation Methods ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Simplified Method ◽  
Nonlinear Contact

As lifting points for ship block turning over and hoisting operation, the strength of the lifting eye directly affects the safety of the operation, therefore it is required for extreme high reliability. The conventional strength analysis can not exactly describe the actual stress and working conditions of the lifting eye, nonlinear contact and simplified finite element arithmetic are used for analyzing and checking the lifting eye's strength in this paper; and the stress force distribution formula, which can well reflect the true status of the pressure-bearing surface, is researched. Through the comparison of the various calculation methods, it can be found that the reasonable simplified method can approach the nonlinear contact finite element arithmetic with high precision and is characterized with higher calculation speed and more concise and practicable.

Development and Analysis for a New Compliant XY Micropositioning Stage Applied for Nanoindentation Tester System

2019 ◽  
Vol 894 ◽  
pp. 60-71
Author(s):  
Minh Phung Dang ◽  
Thanh Phong Dao ◽  
Hieu Giang Le ◽  
Ngoc Thoai Tran
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Taguchi Method ◽  
Optimization Problems ◽  
High Reliability ◽  
Hybrid Approach ◽  
Element Analysis ◽  
Amplification Ratio ◽  
Design Variables ◽  
The Finite Element Analysis

A Compliant XY micropositioning stage is purported for situating a material sample in nanoindentation tester process. This paper aims to develop, analyze and optimize a XY compliant micropositioning stage. The working stroke of proposed XY stage is amplified by combining the four-lever and a bridge amplification mechanism. To enhance the performances of the stage, the main geometric parameters are optimized by an integration method of Taguchi method, response surface method (RSM) and genetic algorithm (GA). Firstly, static analysis and dynamic analysis are conducted by the finite element analysis in order to predict initial performances of the XY stage. Secondly, the number of experiments and the data are retrieved by combination of the finite element analysis-integrated Taguchi method. Thirdly, the effects of main design variables on the output response sensitivity are considered. Later on, mathematical model for the amplification ratio was established by the RSM. Finally, based on the mathematical equation, the GA is adopted to define the optimal design variables. The results of numerical validations are in a good agreement with the predicted results. The results depicted that the proposed hybrid approach ensures a high reliability for engineering optimization problems.

The Structure and Properties Research for Sealing Capsule

2014 ◽  
Vol 1065-1069 ◽  
pp. 1296-1299
Author(s):  
Yong Huan Luo ◽  
Zheng Lin Feng ◽  
Jun Liu ◽  
Hong Feng Guo
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Hong Kong ◽  
Working Conditions ◽  
Basic Structure ◽  
Structure And Properties ◽  
Correlation Model ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Pile Cap

This paper, A research for the sealing capsule which used in the construction of the underwater cap of Hong Kong-Zhuhai-Macao Bridge. Through the introduction of precast pile cap construction, combined with the sealing of the capsule works, and the basic structure of the sealing of the capsule with installation design. We establish correlation model, combined with the actual working conditions, the application of the finite element analysis of the sealing capsules water sealing characteristics simulation. It shows that the sealing capsule can well meet the actual needs of the Hong Kong-Zhuhai-Macao Bridge underwater cap construction.

The Finite Element Analysis and Optimization of Subway Steel Structure Work Platform Based on Workbench and Pro/E in a Subway

2012 ◽  
Vol 538-541 ◽  
pp. 2953-2956
Author(s):  
Ya Li ◽  
Guang Sheng Ren
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Structural Characteristics ◽  
Steel Structure ◽  
Strength Analysis ◽  
Element Analysis ◽  
Maximum Deformation ◽  
Software Model ◽  
The Finite Element Analysis ◽  
Calculation Results

The static and stability analysis of steel structure were taken according to steel structure work platform’s requirements and structural characteristics in a subway parking space by using the software model which is established by Pro/E software and implanted into the finite element analysis software ANSYS Workbench. The maximum deformation and stress in design load of the steel structure were calculated and the linear stress strength analysis of the key parts was carried out, also both the analysis and testing of the supporting pillar’s stability were performed. The results show that the structure model established by Pro/E and the calculation method are reasonable. Moreover, the calculation results are of high accuracy. The profile size is properly chosen and the structure bearing capacity and deformation meet the design requirements.

scholarly journals Finite Element Fatigue Analysis of Unsupported Crane

2021 ◽  
Vol 28 (1) ◽  
pp. 127-135
Author(s):  
Ryszard Buczkowski ◽  
Bartłomiej Żyliński
Keyword(s):  
Finite Element ◽  
Numerical Analysis ◽  
Fatigue Analysis ◽  
Strength Analysis ◽  
Marine Structures ◽  
Element Analysis ◽  
Static Loads ◽  
The Finite Element Analysis ◽  
Sufficient Degree ◽  
Number Of Cycles

Abstract The presented strength and fatigue calculations refer to an unsupported deck crane and its three distinct parts: housing, jib and column. Static loads applied to the structure were due to the crane’s own weight and a maximum working load, corresponding to a maximum lifting capacity at a maximum outreach of the crane. The numerical analysis was aimed at determining the thickness of the skin plating of the column and the number, shape and distribution of stiffeners in the column, housing and jib, ensuring that the crane yields correct strength and fatigue parameters. During the process of designing marine structures, the standard numerical analysis is, in many cases, limited to calculations in the basic strength range. Even when using numerical methods of analysis, complex strength and fatigue calculations are often not performed. The modern numerical analysis chain for marine structures should concentrate not only on strength analysis, but should take a further step, which encompasses fatigue analysis. The article presents a new outlook on design methods, which should be the entry point to the design of marine structures. Based on the acquired number of cycles of fatigue life, it is possible to estimate, with a sufficient degree of accuracy, the practical service life of a structure. To solve the problem, the authors used the finite element analysis software ABAQUS supported by the fe-safe system.

Research on Analysis Method of Fatigue Strength for New Type Crushing Ripper Based on the Composite Load Spectrum

2014 ◽  
Vol 487 ◽  
pp. 378-384
Author(s):  
Feng Yi Lu ◽  
Xin Xin Liu ◽  
Ge Ning Xu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Strength ◽  
Strength Analysis ◽  
Analysis Method ◽  
Load Spectrum ◽  
Element Analysis ◽  
Structural Fatigue ◽  
The Finite Element Analysis ◽  
New Type

In view of the problem that new type crushing ripper installation of tamping equipment in circulation under the action of different load working multiple cases may occur structural fatigue damage, analysis of its force characteristic, establishment ripper rack compression bending component model, according to the working condition of the most unfavorable load combinations, using the allowable stress method to calculate structural fatigue strength; the combined effect of road load spectrum and vibrating load is also taken into consideration, then statics analysis and fatigue analysis of new type crushing ripper are calculated with the finite element analysis software Ansys Workbench. The results show that theoretical calculations are in accordance with the finite element analysis results, it evidences that the fatigue strength analysis method of crushing ripper is feasible and correct. It provides a reference for the anti-fatigue optimization design of new type crushing ripper, to guarantee its meet the operational requirements under of bad conditions.

Strategy for Determining Analysis Working Conditions of Hydraulic Excavator

2013 ◽  
Vol 838-841 ◽  
pp. 487-493
Author(s):  
Qing Ying Qiu ◽  
Zhen Kai Wei ◽  
Bing Li ◽  
Yu Gao ◽  
Pei En Feng ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Working Conditions ◽  
Strength Analysis ◽  
Hydraulic Excavator ◽  
Analysis Method ◽  
Element Analysis ◽  
Finite Element Analysis Method ◽  
Working Device

It was incomplete and may have missed some dangerous working conditions to select several typical working conditions only in traditional strength analysis of hydraulic excavator. Therefore, the paper proposes a strategy that takes the working conditions when the load at each hinge of working device reaches largest into account. The working device of a 21t hydraulic excavator was analyzed with finite element analysis method when comparing these working conditions with the traditional typical ones. The results come out that the largest stress of boom, arm and bucket under these conditions increased respectively by 4.6%, 5.6% and 19.1% compared with the traditional most dangerous conditions. Consequently, in addition to the traditional typical conditions, it will be more safe and reliable to analyze the strength with the largest hinge loads conditions.

scholarly journals Burst Strength Analysis of Casing With Geometrical Imperfections

2006 ◽  
Vol 129 (4) ◽  
pp. 763-770 ◽  
Author(s):  
Xiaoguang Huang ◽  
Yanyun Chen ◽  
Kai Lin ◽  
Musa Mihsein ◽  
Kevin Kibble ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Strength Analysis ◽  
Element Analysis ◽  
Burst Strength ◽  
The Finite Element Analysis ◽  
Geometrical Imperfections ◽  
Major Factors

Accurately predicting the burst strength is very important in the casing design for the oil and gas industry. In this paper, finite element analysis is performed for an infinitely long thick walled casing with geometrical imperfections subjected to internal pressure. A comparison with a series of full-scale experiments was conducted to verify the accuracy and reliability of the finite element analysis. Furthermore, three predictive equations were evaluated using the test data, and the Klever equation was concluded to give the most accurate prediction of burst strength. The finite element analysis was then extended to study the effects of major factors on the casing burst strength. Results showed that the initial eccentricity and material hardening parameter had important effects on the burst strength, while the effect of the initial ovality was small.

Research on Vehicle Lifting Jack Structure Failure Trend on Basis of Static Strength Analysis

2013 ◽  
Vol 275-277 ◽  
pp. 751-755
Author(s):  
Chang Qing Xia ◽  
Ying Shi Sun
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Working Conditions ◽  
Nonlinear Finite Element Analysis ◽  
Static Strength ◽  
Nonlinear Finite Element ◽  
Process Equipment ◽  
Strength Analysis ◽  
Element Analysis ◽  
Railway Vehicles

To ensure the safe use of vehicle lifting jack as process equipment for fabricating and producing railway vehicles, this paper analyzes on the working conditions of vehicle lifting jack and makes contact nonlinear finite element analysis on various typical working conditions. Through the analysis result on static strength thereof, the parts easily subject to dangers are located, and the failure trend of parts can be prejudged by locating the weaknesses, which guides for prejudging the failures in actual production and can prevent the occurrence of accidents.

Structural Analysis and Improvement of Large-Scale Forklift's Wheel Rim

2013 ◽  
Vol 712-715 ◽  
pp. 1080-1083
Author(s):  
Hu Qi Wang ◽  
Hai Zhao He ◽  
Hai Yan Lu ◽  
Rong Xing Huang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Working Conditions ◽  
Large Scale ◽  
Element Model ◽  
Analysis Model ◽  
Element Analysis ◽  
Wheel Rim ◽  
Weak Part ◽  
The Finite Element Analysis

A large-scale forklift's wheel rim appeared cracking phenomenon in the course of use. This article summarized and analyzed force of the forklift's wheel rim according to the typical working conditions of forklift, and calculated the load of various working conditions. It provided the correct boundary conditions for the finite element analysis of the wheel rim [. After the analysis of wheel rim's three typical conditions, found the weak parts of the structure of the rim, and this part was consistent with the feedback part, so it proved correct of the finite element analysis model. Clever was used ribbed-plate and punching groove to strengthen the weak part of wheel rim and the finite element model was used to calculate and check the improved wheel rim again. The results showed that the improved wheel rim stress decreased quite, so the measure was correct.

The Strength Analysis on the Gear Ring of Ladle Turret of the Continuous Caster

2013 ◽  
Vol 307 ◽  
pp. 244-249
Author(s):  
Da Chao Hu ◽  
Zhi Hao Qu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Continuous Caster ◽  
Work Load ◽  
Strength Analysis ◽  
Element Analysis ◽  
Strength Evaluation ◽  
The Finite Element Analysis ◽  
Electric Measurement ◽  
Gear Ring

The strength question of a key component- the big gear ring, which locate on the equipment of ladle rotating turret in a steel plant is discussed in the text . In order to attain work load acted on the big gear ring, the mathematics exploring technology and the electric measurement are used. Lastly, a strength evaluation of the big gear ring was obtained by the theory of the finite element analysis.

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