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

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.

Download Full-text

PWAS EMIS-ECIS Active Carbon Filter Residual Life Estimation Methodology

10.21236/ada617286 ◽

2013 ◽

Author(s):

Victor Giurgiutiu ◽

Jingjing Bao

Keyword(s):

Active Carbon ◽

Residual Life ◽

Life Estimation ◽

Carbon Filter

Download Full-text

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

Recent Patents on Mechanical Engineering ◽

10.2174/2212797613999201231200939 ◽

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.

Download Full-text

Residual life estimation based on a generalized Wiener degradation process

Reliability Engineering & System Safety ◽

10.1016/j.ress.2013.11.011 ◽

2014 ◽

Vol 124 ◽

pp. 13-23 ◽

Cited By ~ 110

Author(s):

Xiaolin Wang ◽

Narayanaswamy Balakrishnan ◽

Bo Guo

Keyword(s):

Residual Life ◽

Degradation Process ◽

Life Estimation

Download Full-text

Fatigue Life Assessment of Crane Reel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.383-390.2941 ◽

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.

Download Full-text