本文選題：雙鋼輪壓路機　切入點：減振　出處：《長安大學》2015年碩士論文　論文類型：學位論文

【摘要】：雙鋼輪振動壓路機主要用于高等級公路面層的壓實,這對其壓實作業(yè)質(zhì)量、工作可靠性及駕駛舒適性提出了更高的要求。減振系統(tǒng)不僅直接關系振動壓路機機架、駕駛室的振動強度和操作舒適性,而且影響振動參數(shù)、振幅均勻性和壓實作業(yè)質(zhì)量。減振技術是雙鋼輪振動壓路機的關鍵技術之一,技術含量較高,國產(chǎn)機型與國外同類產(chǎn)品在減振性能上仍存在一定差距。根據(jù)某國產(chǎn)12t雙鋼輪振動壓路機減振性能測試結果,分析了樣機減振系統(tǒng)存在的主要問題。總結前人研究成果和實踐經(jīng)驗,提出了一些減振系統(tǒng)應遵循的基本原則和要求。針對測試樣機機架振動劇烈,整體減振效果不佳的問題,通過建立相應的減振模型,分析了減振器剛度和阻尼對振動幅值,振動功率,一級減振系統(tǒng)隔振率、共振頻率和壓實作用力的影響,在此基礎上提出了一種振動壓路機一級減振系統(tǒng)減振器選型和校核方法。從提升減振效果不能以犧牲壓實作業(yè)性能為代價的角度出發(fā),利用壓路機二自由度減振模型,分析了振動參數(shù)和上車質(zhì)量對機架減振性能及線壓力的影響,結合樣機實際情況給出了相應的改進建議;利用Abaqus軟件對機架進行模態(tài)分析和諧響應分析,研究了提高機架振動均勻性的措施。工作過程中,測試樣機駕駛室存在較大晃動,本文從多自由度振動解耦的角度出發(fā),通過降低駕駛室多自由度間的振動耦合來提升駕駛室減振效果,并用Adams模型進行相應驗證。
[Abstract]:The double steel wheel vibratory roller is mainly used for the compaction of high grade highway surface layer, which puts forward higher requirements for its compaction quality, working reliability and driving comfort. The vibration absorption system not only relates directly to the vibratory roller frame, but also to its driving comfort. The vibration intensity and operating comfort of the cab also affect the vibration parameters, amplitude uniformity and compaction quality. Vibration absorption technology is one of the key technologies of the double steel wheel vibratory roller, and the technical content is relatively high. There is still a certain gap between domestic and foreign products in vibration absorption performance. According to the test results of vibration absorption performance of a 12t double-wheel vibration roller made in China, This paper analyzes the main problems existing in the vibration absorption system of the prototype, summarizes the previous research results and practical experiences, and puts forward some basic principles and requirements that should be followed by the vibration absorption system. The effects of stiffness and damping on vibration amplitude, vibration power, isolation rate, resonance frequency and compaction force of the first stage damping system are analyzed by establishing the corresponding damping model. On the basis of this, a method for selecting and checking the vibration absorber of the first stage vibration absorption system of vibratory roller is proposed. From the point of view that the effect of vibration reduction can not be improved at the expense of compaction performance, the two-degree-of-freedom damping model of roller is used. The effects of vibration parameters and vehicle mass on the vibration absorption performance and line pressure of the frame are analyzed, and the corresponding improvement suggestions are given according to the actual conditions of the prototype, and the modal analysis and harmonic response analysis of the frame are carried out by using Abaqus software. The measures to improve the vibration uniformity of the frame are studied. During the working process, there is a large sloshing in the cab of the test prototype. In this paper, the vibration decoupling of the multi-degree-of-freedom system is considered. The vibration reduction effect of cab is improved by reducing the vibration coupling between multi-degrees of freedom in cab and verified by Adams model.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U415.521

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