本文選題：沖擊夯 + 虛擬樣機(jī)��； 參考：《西安建筑科技大學(xué)》2014年碩士論文

【摘要】：現(xiàn)代夯土墻建造區(qū)別于傳統(tǒng)工藝的重要方面就是以電動(dòng)夯錘代替?zhèn)鹘y(tǒng)手工夯錘，針對(duì)夯土墻建造的小型電動(dòng)沖擊夯的研究很少，而目前使用的沖擊夯以國(guó)外產(chǎn)品為主，其價(jià)格昂貴、體積大、過于笨重，很難適應(yīng)建造行業(yè)新要求，故市場(chǎng)迫切需要一種具有重量輕、低振動(dòng)、沖擊力大等優(yōu)點(diǎn)的電動(dòng)沖擊夯來滿足該工作環(huán)境下土壤的夯實(shí)要求，減輕工人的勞動(dòng)強(qiáng)度，降低工人的工作時(shí)間，提高夯實(shí)土壤的工作效率。 現(xiàn)代科技瞬息萬變，特別是隨著計(jì)算機(jī)工程技術(shù)的不斷進(jìn)步，虛擬樣機(jī)技術(shù)也得到了快速的發(fā)展，在我國(guó)機(jī)械制造行業(yè)中的應(yīng)用也越來越廣泛，該技術(shù)設(shè)計(jì)具有周期短，成本低、風(fēng)險(xiǎn)小等優(yōu)點(diǎn)，經(jīng)大量實(shí)驗(yàn)證明，在虛擬樣機(jī)中運(yùn)行良好的樣機(jī)模型能夠用于實(shí)體加工。 長(zhǎng)期以來，人們通過建立振動(dòng)沖擊夯的理論力學(xué)模型，運(yùn)用數(shù)值分析方法求解其運(yùn)動(dòng)學(xué)和動(dòng)力學(xué)方程，，作為設(shè)計(jì)的理論基礎(chǔ)。但在建立模型時(shí)做的某些簡(jiǎn)化顯然會(huì)影響計(jì)算結(jié)果，且有些參數(shù)之間的關(guān)系又無法由方程求解得到，而利用多體動(dòng)力學(xué)建模軟件ADAMS對(duì)沖擊夯進(jìn)行系統(tǒng)的設(shè)計(jì)，只要模型足夠的準(zhǔn)確，就可以很大程度的改善上述情況，故本文應(yīng)用該技術(shù)進(jìn)行新型電動(dòng)沖擊夯的研究與設(shè)計(jì)。 本文通過對(duì)沖擊夯工作原理的分析建立了動(dòng)力學(xué)模型，確定了影響沖擊夯性能的關(guān)鍵參數(shù)；為了提高設(shè)計(jì)的準(zhǔn)確性和效率，應(yīng)用Pro/E軟件建立了沖擊夯的三維實(shí)體模型，導(dǎo)入ADAMS軟件后通過添加必要的約束，建立了沖擊夯虛擬樣機(jī)模型，將HCD80沖擊夯的關(guān)鍵參數(shù)代入模型對(duì)其正確性進(jìn)行了驗(yàn)證；通過系統(tǒng)仿真分析確定了曲柄半徑r、彈簧剛度K、夯機(jī)上機(jī)體m和夯腳m2的比值n、彈簧預(yù)壓縮力P等關(guān)鍵參數(shù)對(duì)沖擊夯性能影響的規(guī)律及其最優(yōu)值范圍；結(jié)合上述規(guī)律和最優(yōu)值的范圍，進(jìn)行大量仿真尋優(yōu)，最終確定一組關(guān)鍵參數(shù)的最優(yōu)值，來指導(dǎo)沖擊夯的樣機(jī)設(shè)計(jì)。運(yùn)行顯示該樣機(jī)模型能夠用于實(shí)體樣機(jī)的加工制造，可為小型電動(dòng)沖擊夯的性能研究、制造及加工提供參考。這種充分結(jié)合虛擬樣機(jī)技術(shù)的機(jī)械設(shè)計(jì)方法同樣適用于其它類似產(chǎn)品的研究與設(shè)計(jì)，同時(shí)也為機(jī)械設(shè)計(jì)中解決復(fù)雜動(dòng)力學(xué)問題提供了新的可行的思路。
[Abstract]:The important aspect of modern rammed earth wall construction differs from traditional technology is that electric rammer is used instead of traditional manual rammer. There is little research on small scale electric impact rammer for rammed earth wall construction, but at present the impact rammer is mainly used by foreign products. It is expensive, bulky and too bulky, so it is difficult to adapt to the new requirements of the construction industry. Therefore, the market urgently needs a kind of electric impact compaction with the advantages of light weight, low vibration and large impact force to meet the needs of soil compaction in the working environment. Reduce the labor intensity of workers, reduce the working hours of workers, improve the work efficiency of compacted soil. Modern science and technology are changing rapidly, especially with the continuous progress of computer engineering technology, virtual prototyping technology has also been rapid development, in China's mechanical manufacturing industry is more and more widely used, the technology design has a short period. The advantages of low cost and low risk have been proved by a large number of experiments that the prototype model which runs well in virtual prototyping can be used in solid processing. For a long time, the theoretical mechanical model of vibratory impact compaction is established, and the kinematics and dynamics equations are solved by numerical analysis method, which is the theoretical basis of design. However, some simplification in modeling will obviously affect the calculation results, and the relationship between some parameters can not be solved by the equation. The multi-body dynamics modeling software ADAMS is used to design the system of impact compaction. As long as the model is accurate enough, the above situation can be improved to a great extent, so this paper applies this technology to the research and design of a new type of electric impact compaction. In this paper, the dynamic model is established by analyzing the working principle of impact compaction, and the key parameters affecting the performance of impact compaction are determined. In order to improve the accuracy and efficiency of design, the three-dimensional solid model of impact compaction is established by using Pro/E software. After importing ADAMS software, the virtual prototype model of impact compaction is established by adding necessary constraints, and the correctness of the model is verified by replacing the key parameters of HCD80 impact ramming with the model. The influence of crank radius r, spring stiffness K, the ratio of body m and foot m 2 of rammer and spring precompression force P on the performance of impact compaction and its optimal range are determined by system simulation analysis. Combined with the above laws and the range of the optimal values, a large number of simulation optimization is carried out, and the optimal values of a group of key parameters are finally determined to guide the prototype design of impact compaction. The operation shows that the model can be used in the machining and manufacturing of solid prototypes, and it can be used as a reference for the research, manufacture and processing of small scale electric impact compaction. The mechanical design method, which is fully combined with virtual prototyping technology, is also suitable for the research and design of other similar products. At the same time, it also provides a new and feasible way to solve the complex dynamic problems in mechanical design.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU66

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1 劉浩峰;夯土墻用新型電動(dòng)沖擊夯的研究與設(shè)計(jì)[D];西安建筑科技大學(xué);2014年

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