基于模態(tài)疊加法的面壓載荷與基礎激勵等效方法
發(fā)布時間：2018-08-19 11:54
【摘要】：基于模態(tài)疊加法,將隨機面壓載荷等效為隨機基礎激勵,為薄壁構件的振動臺試驗替代成本較高的噪聲試驗提供依據(jù).該方法要求等效前后2種載荷作用下主模態(tài)位移一致,將單源載荷等效這一超靜定問題合理簡化為靜定問題.以炭/炭復合材料懸臂板為研究對象,來驗證載荷等效方法的有效性.分析結果顯示,在隨機面壓載荷及等效隨機基礎激勵作用下,板上典型部位隨機正應力響應的功率譜密度高度吻合,在分析頻段內(nèi)危險點處x軸向正應力響應均方根分析誤差低于1%,分布在板上的5個響應點處x軸向正應力響應均方根分析誤差低于2%.該方法能有效地將隨機面壓載荷等效為基礎激勵,保證等效前后2種載荷作用下薄壁構件的隨機動應力響應在頻域及空間域上的分布一致性.
[Abstract]:Based on the modal superposition method, the random surface compression load is equivalent to the random foundation excitation, which provides the basis for replacing the high-cost noise test with the shaking table test of thin-walled members. In this method, the displacement of the main mode should be the same under the two kinds of loads, and the statically indeterminate problem of the equivalent load of a single source should be reasonably simplified as a statically indeterminate problem. The cantilever plate of carbon / carbon composites was studied to verify the effectiveness of the load equivalent method. The results show that the power spectral density of the random normal stress response of typical parts of the plate is in good agreement with the equivalent random foundation excitation under the random surface compression load. The root mean square error of x axial normal stress response is less than 1 at the risk point in the analysis band, and less than 2% at 5 response points distributed on the plate. This method can effectively equalize the random surface compressive load as the basic excitation, and ensure the distribution consistency of the random dynamic stress response of thin-walled members in frequency domain and spatial domain under the two kinds of equivalent loads.
【作者單位】： 東南大學土木工程學院;
【基金】：國家自然科學基金資助項目(11402052,11572086) 教育部新世紀優(yōu)秀人才支持計劃資助項目(NCET-11-0086) 江蘇省自然科學基金資助項目(BK20140616)
【分類號】：TB332
本文編號：2191580
[Abstract]:Based on the modal superposition method, the random surface compression load is equivalent to the random foundation excitation, which provides the basis for replacing the high-cost noise test with the shaking table test of thin-walled members. In this method, the displacement of the main mode should be the same under the two kinds of loads, and the statically indeterminate problem of the equivalent load of a single source should be reasonably simplified as a statically indeterminate problem. The cantilever plate of carbon / carbon composites was studied to verify the effectiveness of the load equivalent method. The results show that the power spectral density of the random normal stress response of typical parts of the plate is in good agreement with the equivalent random foundation excitation under the random surface compression load. The root mean square error of x axial normal stress response is less than 1 at the risk point in the analysis band, and less than 2% at 5 response points distributed on the plate. This method can effectively equalize the random surface compressive load as the basic excitation, and ensure the distribution consistency of the random dynamic stress response of thin-walled members in frequency domain and spatial domain under the two kinds of equivalent loads.
【作者單位】： 東南大學土木工程學院;
【基金】：國家自然科學基金資助項目(11402052,11572086) 教育部新世紀優(yōu)秀人才支持計劃資助項目(NCET-11-0086) 江蘇省自然科學基金資助項目(BK20140616)
【分類號】：TB332
【相似文獻】
相關期刊論文 前10條
1 王其營;王洪訓;馮成果;祝長文;;胎面壓出工序設備及工裝的改進[J];橡塑技術與裝備;2010年08期
2 王其營;秦普慶;鄧才翰;穆峰;;淺談設備的性能與操作對胎面壓出質量的影響[J];彈性體;2006年03期
3 楊芷瑛;介紹在胎面壓出生產(chǎn)線中用于貼緩沖膠的幾種橡膠壓延設備[J];橡膠技術與裝備;1995年06期
4 趙成軍;胎面壓出生產(chǎn)線的改造[J];橡膠技術與裝備;1997年02期
5 林自萍;;微機在胎面壓出自動定長控制中的應用[J];寧夏石油化工;2003年04期
6 蘇小山;;臥式雙面壓蓋機的工裝設計[J];軸承;2007年02期
7 吳樹棟;論快速貼面壓機機組的總體設計[J];木材工業(yè);1993年03期
8 ;TM2680A型曲面壓機[J];家具;2004年05期
9 ;TM2680A型曲面壓機[J];家具;2004年03期
10 馮興財;李佳;;模具強度的面壓測定方法解析[J];機械工程師;2009年09期
，本文編號：2191580
本文鏈接：http://sikaile.net/kejilunwen/cailiaohuaxuelunwen/2191580.html
最近更新
教材專著
