本文選題：O型鋼絲繩隔振器　切入點：遲滯環(huán)　出處：《重慶大學》2015年博士論文

【摘要】：鋼絲繩隔振器是一種典型的非線性隔振裝置,具有良好的剛度和阻尼特性,承載能力較高,不老化,能夠承受拉壓、剪切和橫滾三向載荷,廣泛應用于工業(yè)、國防和航空航天等領(lǐng)域以及其他敏感設(shè)備的沖擊和振動隔離。目前應用較為廣泛的鋼絲繩隔振器主要有螺旋型、拱型和球型等幾種結(jié)構(gòu)型式。然而,這些鋼絲繩隔振器一旦成型,其彈性阻尼特性已基本確定,而且損壞后不易維修。針對其不足,本文在國家自然科學基金項目(項目編號:51175525)的資助下,提出一種O型鋼絲繩隔振器,該隔振器采用多個彼此獨立的鋼絲繩環(huán)作為彈性阻尼元件,由上下夾板將鋼絲繩環(huán)通過螺釘連接在一起。與傳統(tǒng)鋼絲繩隔振器比較,該隔振器能根據(jù)要求通過調(diào)整鋼絲繩環(huán)個數(shù)來改變隔振器的彈性和阻尼特性,而且結(jié)構(gòu)簡單,裝夾方便,維修容易,組裝靈活。本文圍繞這種O型鋼絲繩隔振器開展研究,為設(shè)計和應用該隔振器奠定試驗和理論基礎(chǔ)。本文主要研究內(nèi)容如下:1)設(shè)計制作一種O型鋼絲繩環(huán)焊接工裝,并提出了多步焊接工藝,成功制作出研究所需的多規(guī)格O型鋼絲繩繩環(huán)。在確定了隔振器加載方式以及安裝形式基礎(chǔ)上,分別設(shè)計和加工隔振器剪切、橫滾和拉壓方向上的三向試驗工裝夾具。這些研究為測試O型鋼絲繩隔振器特性試驗的順利進行以及確保采集試驗數(shù)據(jù)的準確性奠定基礎(chǔ)。2)提出了O型鋼絲繩隔振器試驗研究方案。獲得了O型鋼絲繩隔振器的結(jié)構(gòu)參數(shù)(繩圈環(huán)數(shù)、鋼絲繩直徑、鋼絲繩環(huán)直徑和繩環(huán)的水平傾斜角度)以及激勵振幅和頻率對隔振器在剪切、橫滾和拉壓方向上動態(tài)遲滯阻尼特性的影響規(guī)律。為O型鋼絲繩隔振器特性的后續(xù)研究提供了充分的試驗數(shù)據(jù)。3)建立了一種改進的歸一化Bouc-Wen理論分析模型,該模型在歸一化Bouc-Wen模型基礎(chǔ)上引進兩個多項式修正因子。實現(xiàn)了O型鋼絲繩隔振器剪切、橫滾和拉壓三向試驗動態(tài)遲滯特性的建模。仿真和試驗結(jié)果表明該模型能夠準確的描述O型鋼絲繩隔振器三向試驗遲滯特性。4)提出了一種兩步混合集成法對O型鋼絲繩隔振器的理論分析模型參數(shù)進行識別研究,該參數(shù)識別方法含線性最小二乘法和極限環(huán)法。數(shù)值仿真和試驗結(jié)果證實所采用的參數(shù)識別方法可以準確有效的識別出隔振器的所有模型參數(shù)。該方法不涉及迭代算法而且識別的模型遲滯曲線和試驗遲滯曲線吻合較好。5)對含O型鋼絲繩隔振器的單自由度非線性系統(tǒng)穩(wěn)態(tài)響應進行了系統(tǒng)的研究。為了快速準確求解該系統(tǒng)的穩(wěn)態(tài)響應,提出一種迭代諧波平衡半解析法分析含O型鋼絲繩隔振器單自由度非線性系統(tǒng)穩(wěn)態(tài)響應。該方法利用諧波平衡法形成一個非線性系統(tǒng)優(yōu)化問題,采用非線性信賴域反射迭代算法對該非線性優(yōu)化問題求解。仿真和試驗結(jié)果表明:O型鋼絲繩隔振器具有明顯非線性特性和優(yōu)異的隔振性能;在大多數(shù)情況下,數(shù)值積分法要經(jīng)歷幾個周期或者幾百個周期才達到穩(wěn)態(tài)響應,而迭代諧波平衡半解析法能較快并準確地得到含O型鋼絲繩隔振器單自由度非線性系統(tǒng)的幅頻響應曲線,該方法理論分析推導量少,節(jié)省大量計算時間;迭代諧波平衡半解析法、Runge-Kutta法和試驗測試所得含O型鋼絲繩隔振器的單自由度非線性系統(tǒng)的穩(wěn)態(tài)響應曲線吻合較好。
[Abstract]:The wire rope isolator vibration isolation device is a typical nonlinear, with good stiffness and damping characteristics, high bearing capacity, not aging, can bear tension and compression, shear and roll three to load, widely used in industry, national defense and aerospace and other sensitive equipment shock and vibration isolation at present the widely application of wire rope isolator are mainly spiral, arch and ball structure types. However, the wire rope isolator once formed, its elastic damping characteristics has been basically established, but the damage is not easy to repair. In view of the disadvantages, based on the National Natural Science Fund Project (project number: 51175525) supported by a O type wire rope isolator is proposed, the isolator using multiple independent wire rope ring as elastic damping element, the upper and lower splints wire rope ring through the screw is connected together with the transfer. The wire rope isolator, the isolator can according to the requirements by adjusting the rope ring number change elastic and damping characteristics of the isolator, and has the advantages of simple structure, convenient clamping, easy maintenance, flexible assembly. This paper focuses on the vibration of O type steel wire rope, for the design and application of the the isolator to provide theoretical and experimental basis. The main research contents of this paper are as follows: 1) design a kind of O type steel wire rope ring welding fixture, and puts forward the multi step welding technology, successfully developed multiple specifications of O wire rope required. In determining the isolator loading method and installation on the basis of the form, respectively, design and processing of vibration isolator shear, rolling and tension in the three direction to the test fixture. The test of O type wire rope isolator characteristics test smoothly and ensure the accuracy of test data collected.2) provided the foundation The O type wire rope isolator test research program. The structure parameters of O type steel wire rope isolator (the rope ring number, the diameter of wire rope, wire rope and rope ring ring diameter horizontal tilt angle) and excitation amplitude and frequency of vibration isolator in shear, influence of roll and pull the direction of pressure on dynamic hysteresis damping. Provide the test data.3 full follow-up study for the O type wire rope isolator characteristics) analysis model is established and an improved normalized Bouc-Wen theory, the model introduced two polynomial correction factor based on the normalized Bouc-Wen model. To achieve the O type wire rope isolator for modeling of shear, roll and tension compression three to test the dynamic hysteresis characteristics. Simulation and experimental results show that the model can accurately describe O type wire rope isolator to test three hysteresis.4) proposed a two step hybrid integration method of O type steel The theoretical analysis of the wire rope isolator model parameters identification research, the parameter identification method with linear least square method and the limit cycle method. Numerical simulation and experiment results prove that the parameter identification methods can accurately identify all the model parameters of vibration isolator. The method does not involve iterative algorithm and the recognition model of hysteresis test curve and hysteresis curve are in good agreement with the.5) to the nonlinear system state of single degree of freedom including O type wire rope isolator response was studied. In order to quickly and accurately solve the steady state response of the system, this paper presents an iterative semi analytical method of harmonic balance analysis with O type wire rope isolator with single degree of freedom nonlinear the steady-state response of the system. The method forms a nonlinear optimization problem by using the harmonic balance method, the nonlinear iterative algorithm of trust domain reflection of the nonlinear optimization problem is solved. The simulation and experimental results show that the O type wire rope isolator has obvious nonlinear characteristics and excellent isolation performance; in most cases, the numerical integration method to undergo several cycles or hundreds of cycles to reach a steady-state response, and iteration harmonic balance semi analytical method can rapidly and with O type wire rope isolator single degree of freedom nonlinear system accurately the amplitude frequency response curve, the method of theoretical analysis is less, save a lot of computation time; iteration harmonic balance semi analytical method, the steady state Runge-Kutta method and experimental O type nonlinear system of single degree of freedom wire rope vibration isolator response curves agree well.

【學位授予單位】：重慶大學
【學位級別】：博士
【學位授予年份】：2015
【分類號】：TB535.1

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