同济大学学报(自然科学版)
同濟大學學報(自然科學版)
동제대학학보(자연과학판)
JOURNAL OF TONGJI UNIVERSITY(NATURAL SCIENCE)
2009年
11期
1513-1517
,共5页
旋转支承%轮轨接触%圆周应力%应力分布
鏇轉支承%輪軌接觸%圓週應力%應力分佈
선전지승%륜궤접촉%원주응력%응력분포
turntable support%wheel-rail contact%circumferential stress%stress distribution
以Hertz弹性接触理论和曲梁理论为基础,分析了回转支承空心钢轮的圆周应力对轮轨接触von Mises应力峰值及其位置的影响,通过采用平面应变有限元的进一步分析表明,降低钢轮截面梁高可以提高钢轮的径向柔度,同时圆周应力可以有效地抑制接触正应力,提高钢轮接触强度,但可能使钢轮接触区内yon Mises应力峰值点从中间向两侧分离,导致应力循环次数翻倍,影响疲劳强度.至于对接触区内钢轮的剪应力和钢轨的von Mises应力,截面梁高的变化对峰值和位置的影响则不大.
以Hertz彈性接觸理論和麯樑理論為基礎,分析瞭迴轉支承空心鋼輪的圓週應力對輪軌接觸von Mises應力峰值及其位置的影響,通過採用平麵應變有限元的進一步分析錶明,降低鋼輪截麵樑高可以提高鋼輪的徑嚮柔度,同時圓週應力可以有效地抑製接觸正應力,提高鋼輪接觸彊度,但可能使鋼輪接觸區內yon Mises應力峰值點從中間嚮兩側分離,導緻應力循環次數翻倍,影響疲勞彊度.至于對接觸區內鋼輪的剪應力和鋼軌的von Mises應力,截麵樑高的變化對峰值和位置的影響則不大.
이Hertz탄성접촉이론화곡량이론위기출,분석료회전지승공심강륜적원주응력대륜궤접촉von Mises응력봉치급기위치적영향,통과채용평면응변유한원적진일보분석표명,강저강륜절면량고가이제고강륜적경향유도,동시원주응력가이유효지억제접촉정응력,제고강륜접촉강도,단가능사강륜접촉구내yon Mises응력봉치점종중간향량측분리,도치응력순배차수번배,영향피로강도.지우대접촉구내강륜적전응력화강궤적von Mises응력,절면량고적변화대봉치화위치적영향칙불대.
Based on the Hertz contact theory and curve beam theory, an analysis is made of the influence of the circumferential stress of the turntable support hollow wheels on the yon Mises stress peak value and location of the wheelrail contact. A further analysis with planer strain finite element shows that the decreasing wheel section height can improve the wheel flexibility, contact normal stress is suppressed and the wheel strength is enhanced. On the other hand, the peak location of von Mises stress may split from central contact area, as a result, the stress circulation is doubled and wheel fatigue strength is affected. As for the wheel shear stress and rail von Mises stress, the variation of wheel section height has little influence on the peak value and location.