本文選題：栓接結合部 + 微觀表征　； 參考：《振動工程學報》2017年01期

【摘要】：為在圖紙設計階段準確獲取數(shù)控機床關鍵功能部件中栓接結合部的動態(tài)特性,綜合考慮結合面和螺栓兩部分因素,運用WM函數(shù)和功率譜函數(shù)表征表面微觀形貌特征,利用統(tǒng)計學方法和Mindlin理論建立結合面剛度模型,最終建立栓接結合部法向與切向剛度模型,根據(jù)模態(tài)試驗與有限元法對比驗證所建模型的正確性。通過分析表面粗糙度、法向載荷和栓接結合部剛度之間的關系,結果表明:法向載荷的大小影響結合面微觀形貌特性,載荷越大,真實接觸面積越大,表面粗糙度越小;在相同法向載荷下,表面粗糙度越小,栓接結合部的剛度越大;栓接結合部的剛度隨著法向載荷的增加而遞增,其速率是先快后慢,且相互之間呈現(xiàn)明顯的非線性關系,但當載荷較小時,栓接結合部的法向剛度與法向載荷呈線性關系,可采用線性化方法獲取栓接結合部的動態(tài)特性。
[Abstract]:In order to accurately obtain the dynamic characteristics of the bolted joints in the key functional components of NC machine tools in the drawing design stage, the micro-morphology of the surfaces is characterized by WM function and power spectrum function. Based on the statistical method and Mindlin theory, the stiffness model of the joint surface is established, and the normal and tangential stiffness models of the bolted joint are established. The correctness of the model is verified by comparing the modal test with the finite element method. By analyzing the relationship among surface roughness, normal load and joint stiffness, the results show that the size of normal load affects the micro-morphology of the bonding surface. The larger the load, the larger the real contact area and the smaller the surface roughness. Under the same normal load, the smaller the surface roughness, the greater the stiffness of the bolted joint, and the stiffness of the bolted joint increases with the increase of the normal load, and the speed of the joint increases first and then slowly, and there is an obvious nonlinear relationship between them. However, when the load is small, the normal stiffness of the bolted joint is linearly related to the normal load, and the dynamic characteristics of the bolted joint can be obtained by the linearization method.
【作者單位】： 西安建筑科技大學機電工程學院;國網(wǎng)東營供電公司;
【基金】：國家自然科學基金資助項目(51305327,51475352) 高等學校博士學科點專項科研基金資助項目(20136120120020) 陜西省自然科學基金項目資助(2014JQ7270)
【分類號】：TG502.31

【相似文獻】

相關期刊論文 前2條

1 ;低溫用合金鋼栓接材料ASTMA320／A320M—93[J];閥門;1995年03期

2 ;[J];;年期

相關碩士學位論文 前3條

1 王金龍;栓接電纜連接器松動故障診斷的研究[D];遼寧工程技術大學;2015年

2 于亮;栓接固定結合面建模與動態(tài)特性研究[D];哈爾濱理工大學;2016年

3 劉鈞慧;栓接太空板承載力分析及連接設計研究[D];北京交通大學;2012年

，

本文編號：1923291