Prediction of fatigue life of coal plow chain under stochastic dynamic load
KANG Xiao-min
LI Gui-xuan
Abstract：Through dynamic model of the coal plow, rain flow counting method and linear Miner fatigue cumulative damage model were used to predict fatigue life of plow chain. Through simulation, fatigue life of plow chain can be obtained under different stochastic cutting resistances, different pretension forces of plow chain and different number of sprocket teeth. The simulation results show that increasing of mean value of cutting resistance make fatigue life decrease, improvement of pretension force of plow chain and number of sprocket teeth make fatigue life increase, and stochastic forces of coal and pretension force of plow chain have obvious effects on fatigue life of plow chain, but influence of sprocket polygon effect is less. Test data of chain tension were analyzed under different cutting depths through the test of plow chain tension. And fatigue cumulative damage change of the plow chain accords with damage change of plow chain by simulating dynamic model.
Keywords：coal plowplow chainfatigue lifecutting resistancepretension force
Publication Date：2010-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 503-508 )