车轮扁疤引发附加冲击力对车轴应力谱影响的研究.pdfVIP

2 8 1 V ol . 28 N o. 1 2 0 0 6 2 JO U RN A L OF T H E CH IN A R AI LW AY SOCIET Y F ebru ary 2006 1001- 8360 ( 200 6) 01-0039- 05 车轮扁疤引发附加冲击力对车轴应力谱影响的研究 王建斌, 邬平波, 唐 兆 ( , 61003 1) , , K o et tgen , , , Neuber , , ; ; U 270 . 11 A Research on the Axle Stress Spectrum Considering Extra Wheelflat Impact Forces WA N G Jian- bin , W U Ping- bo, T A N G Zh ao ( St at e K ey L aborat ory of T ract ion Pow er , S ou th w est Jiaotong U ni versit y , Chengdu 6 1003 1, China) Abstract: A simplif ied fo rmula t o compute w heelf lat s imp act f orces h as been int rodu ced on t he b asis of t he low joint im pact for ces fo rmula and w heelf lat s im pact velocit y fo rmula. T o co mput e t he str es ses of dang er ous ax le sect ion s w it h w heelf lat s im pact, accor ding t o t he K oet t gen p seu do st res s m et hod, t he assem bly of hor iz on reac- t ion f orces and vert ical react ion f orces of rig ht and left w heels w ere decoupled w ith im pact for ces, and t hey w ere analyz ed sep arat ely w ith linear F EM . A nd t hen, the st resses component s o f t hem w ere superimposed and used t o compute t he lo cal st ress and st rain hist or y by means of the N euber not ch correcting arit hmetic. A ccord- ing t o the numerical emulat ion met hodo logy and the met ho d expounded above, t he st res s spectrum of ax le dan- g er ou s sect ion s w it h w heelf lats im pact w ere computed. It can be u sed t o predict t he fat igu e reliability . Key words: w heelf lats imp act ; ex t ra imp act st ress; str es s sp ect rum , , , , , - , 20 70 Derby , P 1 ( 500