【摘要】：固定結(jié)合面作為機(jī)械系統(tǒng)中一種固有的結(jié)構(gòu)形式,由于它在外加載荷的作用下表現(xiàn)出既有彈性又有阻尼的復(fù)雜動(dòng)力學(xué)特性,對機(jī)械系統(tǒng)整體的動(dòng)態(tài)性能產(chǎn)生顯著的影響。隨著工業(yè)化水平的不斷提高,各行業(yè)對機(jī)械設(shè)備動(dòng)態(tài)特性的要求越來越嚴(yán)格,所以對固定結(jié)合面的特性進(jìn)行相關(guān)分析并研究其對機(jī)械系統(tǒng)動(dòng)態(tài)特性的影響具有十分重要的意義。 本文首先對機(jī)械固定結(jié)合面之間的相互作用做了相關(guān)闡述,從理論方面對影響固定結(jié)合面特性的因素進(jìn)行了分析,利用模態(tài)試驗(yàn)與有限元分析相結(jié)合的方法對螺栓連接面的接觸剛度和接觸阻尼進(jìn)行了識別,并通過改變結(jié)合面的正壓力、接觸面積以及結(jié)合面材料試驗(yàn)對比分析了各因素對結(jié)合面參數(shù)的影響規(guī)律。 在確定結(jié)合面單位面積參數(shù)的基礎(chǔ)上,本文利用吉村允孝法對轉(zhuǎn)臺幾個(gè)主要結(jié)合面的接觸剛度和阻尼進(jìn)行了估算。利用法向和切向彈簧阻尼單元對轉(zhuǎn)臺幾個(gè)主要固定結(jié)合面進(jìn)行了等效處理,利用SolidWorks與Ansys對轉(zhuǎn)臺進(jìn)行了動(dòng)態(tài)特性的有限元仿真計(jì)算,獲得了考慮結(jié)合面影響情況下轉(zhuǎn)臺的各階固有頻率和振型,并與固結(jié)結(jié)合面所得的固有頻率進(jìn)行了對比分析,評估了結(jié)合面對轉(zhuǎn)臺動(dòng)態(tài)特性的影響程度。 本文最后利用動(dòng)態(tài)信號分析儀(Agilent 35670A)對轉(zhuǎn)臺的俯仰軸系和轉(zhuǎn)臺的整體分別進(jìn)行了模態(tài)試驗(yàn),獲得了相應(yīng)的頻率響應(yīng)特性曲線,對考慮結(jié)合面影響情況下有限元分析結(jié)果進(jìn)行了驗(yàn)證,并與有限元模態(tài)仿真分析的結(jié)果進(jìn)行了對比分析,這對提高機(jī)械結(jié)構(gòu)動(dòng)態(tài)特性仿真分析的精度具有參考意義。
[Abstract]:As an inherent structural form of mechanical system, the fixed bond surface exhibits the complex dynamic characteristics of both elasticity and damping under the action of external load, which has a significant effect on the dynamic performance of the mechanical system as a whole. With the development of industrialization, the requirements of dynamic characteristics of mechanical equipment are becoming more and more strict, so it is of great significance to analyze the characteristics of fixed joints and to study their influence on the dynamic characteristics of mechanical systems. In this paper, first of all, the interaction between the mechanical fixed joints is expounded, and the factors affecting the characteristics of the fixed joints are analyzed theoretically. The contact stiffness and contact damping of bolted joints are identified by means of modal test and finite element analysis, and the normal pressure of the joints is changed. The influence of various factors on the parameters of the bonding surface was analyzed by means of the contact area and the material test of the bonding surface. On the basis of determining the unit area parameters of the joint surface, the contact stiffness and damping of several main joints of the turntable are estimated by using the Yoon-Xiao method of Yoshimura. The normal and tangential spring damping elements are used to treat several main fixed joints of the turntable, and the finite element simulation of the dynamic characteristics of the turntable is carried out by using SolidWorks and Ansys. The natural frequencies and modes of the turntable under the influence of the bonding surface are obtained, and compared with the natural frequencies obtained from the consolidation interface, the influence degree of the dynamic characteristics of the turntable is evaluated. At last, the modal tests of pitch shafting and turntable are carried out by using dynamic signal analyzer (Agilent 35670A), and the corresponding frequency response characteristic curves are obtained. The results of finite element analysis considering the influence of the interface are verified and compared with the results of finite element modal simulation. It is of reference significance to improve the accuracy of simulation analysis of dynamic characteristics of mechanical structures.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH123

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 蒲大宇;廖日東;左正興;馮慧華;;Finite Element Modeling and Modal Analysis of Complicated Structure with Bolted Joints[J];Journal of Beijing Institute of Technology;2009年03期

2 ;DYNAMIC CONTACT STIFFNESS OF VIBRATING RIGID SPHERE CONTACTING SEMI-INFINITE TRANSVERSELY ISOTROPIC VISCOELASTIC SOLID[J];Acta Mechanica Solida Sinica;2008年06期

3 張學(xué)良,徐格寧,溫淑花;機(jī)械結(jié)合面靜動(dòng)態(tài)特性研究回顧及展望[J];太原重型機(jī)械學(xué)院學(xué)報(bào);2002年03期

4 張學(xué)良;賈庭芳;文曉光;溫淑花;武美先;;懸臂梁結(jié)合面建模與接觸剛度參數(shù)識別[J];太原科技大學(xué)學(xué)報(bào);2010年06期

相關(guān)碩士學(xué)位論文 前2條

1 李秋紅;三軸轉(zhuǎn)臺有限元結(jié)構(gòu)分析[D];哈爾濱工程大學(xué);2007年

2 潘健;三軸轉(zhuǎn)臺結(jié)構(gòu)靜動(dòng)態(tài)特性分析與動(dòng)力學(xué)仿真[D];上海交通大學(xué);2009年

，

本文編號：2331813