scholarly journals Finite Element Analysis for Safety Evaluation of Operator Protection Structure in Hydraulic Excavator

2019 ◽  
Vol 27 (9) ◽  
pp. 715-719 ◽  
Author(s):  
Yong-Jae Park ◽  
Kwang-Hee Lee ◽  
Chul-Hee Lee
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Safety Evaluation ◽  
Hydraulic Excavator ◽  
Element Analysis

scholarly journals Safety Evaluation of Hyperbolic Arch Aqueduct Using Three-Dimensional Laser Scanning and Finite Element Analysis

2020 ◽  
Vol 143 ◽  
pp. 01001
Author(s):  
Chengfa Deng ◽  
Chang Xu ◽  
Qi Xie ◽  
Qiang Peng
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Laser Scanning ◽  
Three Dimensional ◽  
Safety Evaluation ◽  
Scientific Basis ◽  
Structural Safety ◽  
Original Design ◽  
Element Analysis ◽  
Design Data

The safety evaluation of the aqueduct in many years of operation is often performed to determine the structural operational behaviour so as to provide a scientific basis for further reinforcement or reconstruction. The missing of the original design data due to the long construction period provides great challenging in the structural safety evaluation of the aqueduct. Taking a hyperbolic arch aqueduct in China as an example, we first rebuilt the aqueduct model using the three-dimensional (3D) point cloud from the three-dimensional laser scanning technology. Coupled with the on-site safety inspection, the 3D finite element analysis was then performed to learn the stress performance of the aqueduct body and its supporting structures, so as to achieve the purpose of safety evaluation of aqueduct structure in a whole.

Modification for Fatigue Curves Based on Component Reliability

2012 ◽  
Vol 590 ◽  
pp. 116-121
Author(s):  
Li Juan Cao ◽  
Shou Ju Li ◽  
Yi Jin Shangguan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Life ◽  
Fatigue Damage ◽  
Safety Evaluation ◽  
Evaluation Procedure ◽  
Element Analysis ◽  
Component Reliability ◽  
The Relationship

Based on component reliability and scatter factors of material, a new procedure is proposed to modify fatigue curves. The scatter characteristics of fatigue life and strength are investigated. The relationship between modified S-N curves and scatter factors of material is presented. The safety evaluation procedure for fatigue damage based on finite element analysis is performed.

Postliquefaction Deformation of Embankments and Effects on Restraining Piles

1998 ◽  
Vol 1633 (1) ◽  
pp. 19-25
Author(s):  
W.D. Liam Finn
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Residual Strength ◽  
Prestressed Concrete ◽  
Large Strain ◽  
Limit Equilibrium ◽  
Safety Evaluation ◽  
Equilibrium Analysis ◽  
Element Analysis ◽  
Seismic Safety

There are three levels of analysis for assessing the postliquefaction stability of embankments: limit equilibrium analysis using residual strength, Newmark sliding block analysis using residual strength, and finite element large strain displacement analysis. The first two types are well known and often used. In recent years, finite element analysis has been used increasingly for important projects involving life safety and large remediation costs. The application of finite element analysis is illustrated by two case histories—failure of a river protection dike in Japan, and the seismic safety evaluation and subsequent remediation of Sardis Dam in Mississippi. The latter example is particularly relevant to pile-supported abutments because the upstream slope of the dam was nailed to a stable foundation layer using prestressed concrete piles. The determination of the static and dynamic moments and shears in these piles would not have been possible without the finite element analysis. A crucial problem affecting the reliability of all methods of analysis is determining the appropriate value for the residual strength.

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.

Finite Element Analysis on Working Mechanism of Hydraulic Excavator

2012 ◽  
Vol 220-223 ◽  
pp. 905-908
Author(s):  
Xiao Peng Miao ◽  
Wei Zhang ◽  
Hai Bo Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Hydraulic System ◽  
Element Model ◽  
Strength Analysis ◽  
Hydraulic Excavator ◽  
Analysis Method ◽  
Working Mechanism ◽  
Element Analysis ◽  
The Finite Element Analysis

On the basis of working characters, taking a hydraulic excavator as an example, an integrated and refined finite element model of working mechanism was established. Selected four typical working conditions, the strength analysis was made for the assembled working mechanism. According to the finite element analysis, the structure of the working mechanism was improved. The improved working mechanism met the required strength design after increasing the hydraulic system pressure.The results show that this analysis method of working mechanism can provide reference for the excavator working mechanism design.

Based on ANASYS with Finite Element Analysis and Calculation of Cracked Pipeline

2014 ◽  
Vol 989-994 ◽  
pp. 3185-3188
Author(s):  
Xiu Mei Zhu ◽  
Yu Ping Lv
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Corrosion ◽  
Stress Corrosion Crack ◽  
Oil And Gas ◽  
Safety Evaluation ◽  
Transportation Industry ◽  
Ansys Software ◽  
Element Analysis

Pipeline in the entire oil and gas transportation industry play an important role and in the soil is corroded in order to produce the stress corrosion crack. The topic analyzes and calculates cracked pipeline with finite element method by use of ANSYS software mainly, and provides the theory basis for safety evaluation of pipeline.

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