發(fā)布時(shí)間：2018-01-23 01:44

  本文關(guān)鍵詞： 懸臂梁 端部集中質(zhì)量 轉(zhuǎn)動(dòng)慣量 裂紋 有限元　出處：《鄭州大學(xué)學(xué)報(bào)(工學(xué)版)》2016年05期 　論文類型：期刊論文

【摘要】：工程實(shí)際中許多結(jié)構(gòu)可簡化為端部帶有集中質(zhì)量的懸臂梁,筆者通過數(shù)值模擬軟件建立了端部帶有集中質(zhì)量的懸臂梁有限元模型,并進(jìn)行了模態(tài)分析.研究了端部集中質(zhì)量的改變對懸臂梁固有頻率的影響,同時(shí)建立帶有I型裂紋的懸臂梁(端部帶有集中質(zhì)量與不帶有集中質(zhì)量兩種)模型,改變裂紋的位置和深度,研究了裂紋深度和裂紋位置對懸臂梁的頻率變化規(guī)律.通過對比發(fā)現(xiàn),裂紋越靠近端部對梁的頻率影響越小,集中質(zhì)量對帶有裂紋懸臂梁固有頻率有一定的影響.
[Abstract]:In engineering practice, many structures can be simplified to cantilever beam with concentrated mass at the end. The finite element model of cantilever beam with concentrated mass at the end is established by numerical simulation software. The influence of the change of the end mass on the natural frequency of the cantilever beam is studied, and the model of the cantilever beam with mode I crack (with and without the concentrated mass at the end part) is established. The effect of crack depth and crack position on the frequency of cantilever beam is studied by changing the location and depth of crack. It is found that the closer the crack is to the end, the less the influence on the frequency of cantilever beam is. The concentrated mass has a certain influence on the natural frequency of cantilever beam with cracks.
【作者單位】： 河南理工大學(xué)土木工程學(xué)院;大連理工大學(xué)工程力學(xué)系;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51308195) 河南省科技廳科技攻關(guān)項(xiàng)目(132102210252)
【分類號】：TB123
【正文快照】： 0引言工程實(shí)際中很多結(jié)構(gòu)可簡化為端部帶有集中質(zhì)量的懸臂式結(jié)構(gòu),例如端部帶有發(fā)動(dòng)機(jī)的飛機(jī)機(jī)翼,大型吊車,大型懸索大橋,懸臂挑梁,共振式破碎機(jī)等,并且生活中的懸臂梁大部分都為柔性懸臂梁(梁長/梁高5).此類結(jié)構(gòu)都可簡化為端部帶有集中質(zhì)量的懸臂梁(CBCM,cantilever beam wit，

本文編號：1456334