本文選題：復(fù)合隔減振裝置 + 性能試驗(yàn)��； 參考：《東南大學(xué)》2015年碩士論文

【摘要】：載荷平臺(tái)結(jié)構(gòu)是專屬儀器設(shè)備的工作載體,其承載力因其特殊用途會(huì)達(dá)到較大數(shù)量級(jí)。由于所處的工作環(huán)境十分復(fù)雜,振源激勵(lì)具有很寬的頻率范圍(0～500Hz),載荷平臺(tái)的振動(dòng)不僅十分復(fù)雜,而且伴隨著多個(gè)方向的同時(shí)振動(dòng),這些不利因素將導(dǎo)致儀器設(shè)備精度降低和使用壽命縮短。因此,載荷平臺(tái)結(jié)構(gòu)的隔減振要求突出體現(xiàn)在高性能、寬頻率范圍以及高穩(wěn)定性。如何使載荷平臺(tái)滿足隔減振要求,是對(duì)現(xiàn)有隔減振裝置的性能、高耗能材料應(yīng)用及結(jié)構(gòu)設(shè)計(jì)方案的嚴(yán)峻考驗(yàn),在這些方面存在著許多問(wèn)題有待進(jìn)一步解決和完善。本文以用于載荷平臺(tái)結(jié)構(gòu)的新型隔減振裝置為研究對(duì)象,結(jié)合國(guó)內(nèi)外的最新研究進(jìn)展,開展了以下幾個(gè)方面的研究：研究分析了復(fù)合隔減振裝置的力學(xué)性能；建立了復(fù)合隔減振裝置的力學(xué)模型；分析了加入復(fù)合隔減振裝置平臺(tái)結(jié)構(gòu)的動(dòng)力響應(yīng)。以下為本文的主要研究?jī)?nèi)容及有關(guān)結(jié)論：(1)針對(duì)載荷平臺(tái)結(jié)構(gòu)的工作環(huán)境及受力特點(diǎn),引入了一種新型復(fù)合隔減振裝置。該裝置融合了高耗能粘彈性技術(shù)、粘滯流體技術(shù)和空氣彈簧技術(shù),不僅具有良好的豎向隔減振性能,而且連接性能好、穩(wěn)定性高,適用于載荷平臺(tái)的隔減振。(2)對(duì)復(fù)合隔減振裝置進(jìn)行了豎向性能試驗(yàn),并對(duì)數(shù)據(jù)進(jìn)行分析。試驗(yàn)分析表明：加載頻率、位移幅值均復(fù)合隔減振裝置的各項(xiàng)性能參數(shù)有著一定影響；復(fù)合隔減振裝置的動(dòng)態(tài)性能參數(shù),如儲(chǔ)能模量G1、損耗模量G2和損耗因子η,均隨著頻率的增大而增大,隨著位移幅值的增大而減��；每圈耗能Ed隨著頻率與位移幅值的增大而增大。(3)從動(dòng)力學(xué)平衡方程入手,提出了復(fù)合隔減振裝置的力學(xué)模型,該力學(xué)模型能夠同時(shí)考慮粘彈性材料貢獻(xiàn)力、粘滯流體(硅油)貢獻(xiàn)力和空氣彈簧貢獻(xiàn)力,并將該力學(xué)模型的計(jì)算值與試驗(yàn)結(jié)果進(jìn)行了分析對(duì)比。對(duì)比分析結(jié)果表明：建立的復(fù)合隔減振裝置的力學(xué)模型能夠與試驗(yàn)結(jié)果吻合較好,具備較高的精度,能夠?yàn)楣こ虘?yīng)用提供理論基礎(chǔ)。(4)基于本文所提出的復(fù)合隔減振裝置力學(xué)模型,并結(jié)合實(shí)際平臺(tái)結(jié)構(gòu),對(duì)加入復(fù)合隔減振裝置的平臺(tái)結(jié)構(gòu)進(jìn)行了動(dòng)力學(xué)建模,并在MATLAB環(huán)境下對(duì)平臺(tái)結(jié)構(gòu)進(jìn)行了不同激勵(lì)作用下的動(dòng)力反應(yīng)分析,得到時(shí)程響應(yīng)。分析結(jié)果表明：加入復(fù)合隔減振裝置的平臺(tái)結(jié)構(gòu)的動(dòng)位移符合限值要求,加速度時(shí)程顯著降低。
[Abstract]:The load platform structure is the working carrier of the special instrument and equipment, and its bearing capacity will reach the order of magnitude because of its special use. Since the working environment is very complex and the vibration source excitation has a wide frequency range of 500 Hz, the vibration of the loading platform is not only very complex, but also accompanied by simultaneous vibration in many directions. These unfavorable factors will lead to the reduction of the precision and the shortening of the service life of the instrument and equipment. Therefore, the vibration isolation and damping requirements of load platform structure are high performance, wide frequency range and high stability. How to make the load platform meet the requirements of vibration isolation is a severe test for the performance of the existing vibration isolator, the application of high energy dissipation materials and the structural design scheme. There are many problems to be solved and improved in these aspects. In this paper, a new type of vibration isolating device for load platform structure is taken as the research object. Combined with the latest research progress at home and abroad, the following aspects are studied: the mechanical properties of the composite vibration isolating device are studied and analyzed; The mechanical model of the composite vibration isolating device is established and the dynamic response of the platform structure with the composite isolating device is analyzed. The following is the main research content of this paper and related conclusions: (1) according to the working environment and mechanical characteristics of the load platform structure, a new type of composite vibration isolating device is introduced. The device combines high energy dissipation viscoelasticity technology, viscous fluid technology and air spring technology. It not only has good vertical isolation and vibration absorption performance, but also has good connection performance and high stability. The vertical performance test of the composite vibration isolating device is carried out and the data are analyzed. The experimental results show that the loading frequency and displacement amplitude have certain influence on the performance parameters of the composite vibration isolating device, and the dynamic performance parameters of the composite vibration isolating device, For example, the storage modulus G 1, loss modulus G 2 and loss factor 畏 increase with the increase of frequency and decrease with the increase of displacement amplitude. A mechanical model of composite vibration isolator is presented. The model can take into account the contribution of viscoelastic material, viscous fluid (silicone oil) and air spring simultaneously. The calculated values of the model are compared with the experimental results. The results of comparison and analysis show that the mechanical model of the composite vibration isolator is in good agreement with the experimental results and has a high accuracy. It can provide the theoretical basis for engineering application. (4) based on the mechanical model of the composite vibration isolator proposed in this paper, and combining with the actual platform structure, the dynamic model of the platform structure with the composite vibration isolator is established. The dynamic response of the platform structure under different excitations is analyzed in MATLAB, and the time-history response is obtained. The results show that the dynamic displacement of the platform structure with the composite vibration isolator meets the limit requirement and the acceleration time history is significantly reduced.
【學(xué)位授予單位】：東南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU352.1

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