Fatigue residual life estimation of jib structure based on improved v ‐SVR algorithm obtaining equivalent load spectrum

2020 ◽  
Vol 43 (6) ◽  
pp. 1083-1099
Author(s):  
Qing Dong ◽  
Yannan Yu ◽  
Gening Xu
Keyword(s):  
Residual Life ◽  
Load Spectrum ◽  
Life Estimation ◽  
Equivalent Load ◽  
Jib Structure

The ANN Method of Obtaining Fatigue Load Spectrum of Overhead Traveling Crane

2010 ◽  
Vol 20-23 ◽  
pp. 525-531
Author(s):  
Ge Ning Xu ◽  
Xiao Ning Fan ◽  
Feng Yi Lu ◽  
Rui Gang Yang
Keyword(s):  
Fatigue Life ◽  
Back Propagation ◽  
General Purpose ◽  
Load Spectrum ◽  
Life Estimation ◽  
Fatigue Life Estimation ◽  
Actual Load ◽  
Data Investigation ◽  
Artificial Neural Network Ann ◽  
Equivalent Load

For the realization of remaining fatigue life estimation, prevention of catastrophic accidents and safety of the cranes in service, it is necessary to obtain the actual load spectrum of overhead traveling crane. Due to the limitation of condition in field experiment, it is difficult to implement a large number of actual Load Spectrum experiments. So, the present paper will focus on overhead traveling cranes for general purpose and conduct data investigation. In a certain period，the numbers of work cycles corresponding to different lifting loads for different rated lifting capacity are collected. Based on Levenberg-Marquardt Back Propagation(LMBP) Artificial Neural Network(ANN), the equivalent load spectrum, which is equivalent to the actual load spectrum, is acquired. The example demonstrates: It is feasible to establish the equivalent load spectrum for some types of crane using ANN. Meanwhile, the equivalent load spectrums of the typical cranes in this type could be obtained and predicted through the trained network. It has provided the reliable data for the reliability analysis and fatigue life estimation of the crane. In the approach to establish the crane load spectrum, an exploring and initiating study work have been done.

Load Spectrum Compiling and Fatigue Life Estimation of the Automobile Wheel Hub

2020 ◽  
Vol 13 ◽  
Author(s):  
Xintian Liu ◽  
Yang Qu ◽  
Xiaobing Yang ◽  
Yongfeng Shen
Keyword(s):  
Fatigue Life ◽  
High Speed ◽  
Two Dimensional ◽  
Load Spectrum ◽  
One Dimensional ◽  
Life Estimation ◽  
Load Spectra ◽  
Fatigue Life Estimation ◽  
Program Load Spectrum ◽  
Program Load

Background:: In the process of high-speed driving, the wheel hub is constantly subjected to the impact load from the ground. Therefore, it is important to estimate the fatigue life of the hub in the design and production process. Objective:: This paper introduces a method to study the fatigue life of car hub based on the road load collected from test site. Methods:: Based on interval analysis, the distribution characteristics of load spectrum are analyzed. The fatigue life estimation of one - dimensional and two - dimensional load spectra is compared by compiling load spectra. Results:: According to the S-N curve cluster and the one-dimensional program load spectrum, the estimated range fatigue life of the hub is 397,100 km to 529,700 km. For unsymmetrical cyclic loading, each level means and amplitude of load were obtained through the Goodman fatigue empirical formula, and then according to S-N curve clusters in the upper and lower curves and two-dimensional program load spectrum, estimates the fatigue life of wheel hub of the interval is 329900 km to 435200 km, than one-dimensional load spectrum fatigue life was reduced by 16.9% - 17.8%. Conclusion:: This paper lays a foundation for the prediction of fatigue life and the bench test of fatigue durability of auto parts subjected to complex and variable random loads. At the same time, the research method can also be used to estimate the fatigue life of other bearing parts or high-speed moving parts and assemblies.

Residual life estimation based on a generalized Wiener degradation process

2014 ◽  
Vol 124 ◽  
pp. 13-23 ◽  
Author(s):  
Xiaolin Wang ◽  
Narayanaswamy Balakrishnan ◽  
Bo Guo
Keyword(s):  
Residual Life ◽  
Degradation Process ◽  
Life Estimation

Fatigue Life Assessment of Crane Reel

2011 ◽  
Vol 383-390 ◽  
pp. 2941-2944
Author(s):  
Wei Ming Du ◽  
Fei Xue
Keyword(s):  
Finite Element Method ◽  
Fatigue Life ◽  
Fatigue Damage ◽  
Residual Life ◽  
Life Assessment ◽  
Life Estimation ◽  
Fatigue Life Assessment ◽  
Weld Fatigue ◽  
Simulation Results ◽  
Cumulative Fatigue Damage

The crane reel is generally manufactured by section welding method when the diameter is over 380mm. With the cumulative fatigue damage principle which is based on stress S-N curve, the fatigue damage of one crane reel is analyzed by finite element method, the reel weld fatigue strength and fatigue life are calculated, and the simulation results are proved to be reliable. This method provides an efficient reference for crane reel design and residual life estimation.

scholarly journals Residual life estimation of cracked aircraft structural components

2018 ◽  
Vol 46 (1) ◽  
pp. 124-128 ◽  
Author(s):  
Mirko Maksimovic ◽  
Ivana Vasovic ◽  
Katarina Maksimovic ◽  
Natasa Trisovic ◽  
Stevan Maksimovic
Keyword(s):  
Residual Life ◽  
Structural Components ◽  
Life Estimation

scholarly journals Analysis Using Various Approaches for Residual Life Estimation of Power Transformers

2019 ◽  
Vol 11 (2) ◽  
pp. 389-407
Author(s):  
Deepak Kanumuri ◽  
◽  
Veena Sharma ◽  
O. P. Rahi ◽  
◽  
...  
Keyword(s):  
Residual Life ◽  
Power Transformers ◽  
Life Estimation
Sign in / Sign up

Export Citation Format

Share Document