本文關(guān)鍵詞：多相流態(tài)輸運管道隨機不確定建模及振動分析　出處：《浙江大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 輸流管道 隨機激勵 振動 非線性約束 實驗

【摘要】：在現(xiàn)代工業(yè)如石油、化工、核電、海洋工程等領(lǐng)域,輸運管道被廣泛應(yīng)用于各類流態(tài)物料的傳輸,其系統(tǒng)安全性越來越受到人們的重視。開展多相流態(tài)輸運管道振動研究,對于保證輸運管道系統(tǒng)長期穩(wěn)定工作和安全可靠運行,保障國民經(jīng)濟快速發(fā)展和社會安定,具有十分重要的意義。本文利用哈密頓原理和隨機非線性動力學(xué)理論,研究了輸運管道的隨機不確定動力學(xué)建模方法,分析了系統(tǒng)參數(shù)對于管道動力學(xué)特性的影響。論文的主要工作有： 1、應(yīng)用哈密頓原理和隨機非線性動力學(xué)理論,結(jié)合輸運管道的復(fù)雜運行環(huán)境,提出了隨機不確定激勵的模擬形式,建立了輸運管道在兩端固支和懸臂這兩種邊界情況下的隨機非線性振動方程。 2、應(yīng)用伽遼金離散方法和廣義時間積分方法,求解輸運管道振動響應(yīng),并采用一種特定Poincare映射方法,分析了輸運管道的振動特性。 3、根據(jù)隨機非線性振動方程分別研究兩端固定支撐輸運管道、懸臂輸運管道的動力學(xué)特性,分析了管道固有頻率變化規(guī)律以及隨機不確定激勵下的振動響應(yīng)：借助相軌跡圖和Poincare映射研究了激勵頻率、隨機激勵強度、譜寬參數(shù)以及運動約束強度和位置對輸運管道振動特性的影響。 4、根據(jù)彈性約束對振動響應(yīng)的影響分析,提出了彈性約束安裝位置及彈性系數(shù)選擇的合理建議,對輸運管道系統(tǒng)的減振有一定的指導(dǎo)意義。 5、開展了輸運管道振動實驗研究,通過實驗?zāi)B(tài)參數(shù)與理論模態(tài)參數(shù)的對比,驗證了輸運管道動力學(xué)模型的正確性；通過不同工況下的輸運管道振動測試,分析了主要參數(shù)對其振動特性的影響。
[Abstract]:In modern industries such as petroleum, chemical industry, nuclear power, marine engineering and other fields, pipeline is widely used in the transport of all kinds of flow materials. More and more attention has been paid to the safety of the system. The research on the vibration of multi-phase flow pipeline can ensure the long-term stability and safe and reliable operation of the pipeline system. It is very important to guarantee the rapid development of national economy and social stability. In this paper, the stochastic uncertain dynamic modeling method of transportation pipeline is studied by using Hamiltonian principle and stochastic nonlinear dynamics theory. The influence of system parameters on the dynamic characteristics of pipeline is analyzed. The main work of this paper is as follows: 1. Applying Hamiltonian principle and stochastic nonlinear dynamics theory, combined with the complex operating environment of transportation pipeline, the simulation form of stochastic uncertain excitation is proposed. In this paper, the stochastic nonlinear vibration equations of a pipeline under two boundary conditions, namely, clamped at both ends and cantilever, are established. 2. Galerkin discrete method and generalized time integral method are used to solve the vibration response of transportation pipeline, and a special Poincare mapping method is used to analyze the vibration characteristics of transportation pipeline. 3. According to the stochastic nonlinear vibration equation, the dynamic characteristics of the fixed-supported pipeline and the cantilever pipeline are studied respectively. The variation law of natural frequency of pipeline and the vibration response under random uncertain excitation are analyzed. The excitation frequency and random excitation intensity are studied with the help of phase locus and Poincare map. The influence of spectrum width parameters, intensity and position of motion constraint on the vibration characteristics of pipeline. 4. According to the analysis of the effect of elastic constraint on vibration response, the reasonable suggestions on the location of elastic constraint installation and the selection of elastic coefficient are put forward, which is of certain guiding significance to the vibration reduction of transportation pipeline system. 5. The experimental study of pipeline vibration is carried out, and the correctness of the dynamic model of the pipeline is verified by comparing the experimental modal parameters with the theoretical modal parameters. The influence of the main parameters on the vibration characteristics of the pipeline is analyzed through the vibration test of the pipeline under different working conditions.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U171

【參考文獻】

相關(guān)期刊論文 前10條

1 戴大農(nóng);王勖成;杜慶華;;流固耦合系統(tǒng)動力響應(yīng)的模態(tài)分析理論[J];固體力學(xué)學(xué)報;1990年04期

2 倪樵,黃玉盈;增量諧波平衡法用于輸液管的非線性振動分析[J];華中理工大學(xué)學(xué)報;2000年10期

3 倪樵,黃玉盈,陳貽平;微分求積法分析具有彈性支承輸液管的臨界流速[J];計算力學(xué)學(xué)報;2001年02期

4 任建亭,姜節(jié)勝;輸流管道系統(tǒng)振動研究進展[J];力學(xué)進展;2003年03期

5 徐鑒,楊前彪;輸液管模型及其非線性動力學(xué)近期研究進展[J];力學(xué)進展;2004年02期

6 黃玉盈,錢勤,徐鑒,鄒時智,李琳;輸液管的非線性振動、分叉與混沌——現(xiàn)狀與展望[J];力學(xué)進展;1998年01期

7 張立翔,黃文虎,A S TIJSSELING;輸流管道流固耦合振動研究進展[J];水動力學(xué)研究與進展(A輯);2000年03期

8 楊柯,張立翔,王冰笛;充液管道流固耦合軸向振動的對稱模型[J];水動力學(xué)研究與進展(A輯);2005年01期

9 周曉軍,宮敬;氣-液兩相瞬變流的流固耦合研究[J];石油大學(xué)學(xué)報(自然科學(xué)版);2002年05期

10 錢秀清,仝興華,岳伯謙,周進;化工管線振動的流體振源分析[J];石油化工設(shè)備;1997年05期

，

本文編號：1383956