發(fā)布時(shí)間：2018-07-09 18:22

  本文選題：液壓掘巖機(jī) + 有限元分析　； 參考：《合肥工業(yè)大學(xué)》2015年碩士論文

【摘要】：液壓掘巖機(jī)是一種用于對(duì)巖石、混凝土等較硬材質(zhì)進(jìn)行扒掘、剝離、破碎的工程設(shè)備,它不僅可以進(jìn)行扒掘、剝離,而且可以扒掘、剝離和破碎同時(shí)進(jìn)行。目前該產(chǎn)品未在市場(chǎng)上推廣,對(duì)其的研究還處于初期階段,因此對(duì)液壓掘巖機(jī)的設(shè)計(jì)研究是目前最需要的。從結(jié)構(gòu)上講,液壓掘巖機(jī)主要由沖擊器殼體、沖擊器、掘巖鉤組成,但液壓沖擊器的設(shè)計(jì)研究較為成熟,且掘巖鉤是液壓掘巖機(jī)的工作部件,所以對(duì)掘巖鉤的研究是重點(diǎn)。由于液壓掘巖機(jī)的工作過(guò)程與沖擊擺、打樁機(jī)和液壓破碎錘類似,所以本文主要參考它們的分析理論對(duì)掘巖機(jī)進(jìn)行了分析。本文首先對(duì)液壓沖擊器的基本原理及其關(guān)鍵部件的研究狀況做了概述,并根據(jù)企業(yè)提供的設(shè)計(jì)要求進(jìn)行液壓沖擊器的設(shè)計(jì)計(jì)算,再根據(jù)其計(jì)算結(jié)果,對(duì)液壓掘巖機(jī)的關(guān)鍵零部件進(jìn)行建模,然后對(duì)已經(jīng)設(shè)計(jì)的液壓掘巖機(jī)進(jìn)行有限元分析,提出了掘巖機(jī)的優(yōu)化意見(jiàn)。其次,利用沖擊擺的理論分析出了掘巖鉤與轉(zhuǎn)軸安裝的最佳位置,提出了掘巖鉤的另一種結(jié)構(gòu)模型：利用楔形樁的分析方法對(duì)掘巖鉤的承載能力進(jìn)行了分析,推算出了掘巖鉤頂端的極限承載力的估算公式和掘巖鉤側(cè)面的承載力估算公式,證明了承載力與掘巖鉤的結(jié)構(gòu)尺寸和介質(zhì)的性能參數(shù)有關(guān),然后用沖擊機(jī)械碰撞研究常用的應(yīng)力波分析方法分析掘巖鉤中應(yīng)力波的傳播特性,得出了應(yīng)力波的傳播與掘巖鉤的結(jié)構(gòu)參數(shù)有關(guān)。最后通過(guò)ANSYS/LS-DYNA軟件仿真模擬了短釬桿沖擊掘巖鉤的過(guò)程,并根據(jù)其后處理結(jié)果說(shuō)明了掘巖鉤參數(shù)對(duì)沖擊力和應(yīng)力波傳播的影響情況。
[Abstract]:Hydraulic rock excavator is a kind of engineering equipment used to dig, peel and break hard materials such as rock and concrete. It not only can be excavated and stripped, but also can be excavated, stripped and broken at the same time. At present, the product has not been popularized in the market, and the research on it is still in the initial stage, so the design and research of hydraulic rock excavator is the most needed at present. From the structure point of view, hydraulic rock excavator is mainly composed of impactor shell, impactor and rock excavator hook, but the design and research of hydraulic impactor is more mature, and rock excavating hook is the working part of hydraulic rock excavator, so the research of rock excavating hook is the key point. Because the working process of hydraulic rock excavator is similar to that of impact pendulum, pile driver and hydraulic crushing hammer, this paper mainly refers to their analysis theory to analyze the rock excavator. In this paper, the basic principle of the hydraulic impactor and the research status of the key components are summarized, and the design calculation of the hydraulic impactor is carried out according to the design requirements provided by the enterprise, and then according to the calculation results, The key parts of hydraulic rock excavator are modeled, then the finite element analysis of the hydraulic rock excavator has been carried out, and the optimization advice of the excavator is put forward. Secondly, by using the theory of impact pendulum, the optimum position of rock hooks and shaft installation is analyzed, and another structural model of rock excavating hook is put forward: the bearing capacity of rock excavating hook is analyzed by using the analysis method of wedge-shaped pile. The formulas for estimating the ultimate bearing capacity of the top of the excavating hook and the bearing capacity of the side of the excavating hook are derived. It is proved that the bearing capacity is related to the structural size of the excavating hook and the performance parameters of the medium. Then the propagation characteristics of stress wave in rock excavating hook are analyzed by using the stress wave analysis method which is commonly used in the research of impact mechanical collision. It is concluded that the propagation of stress wave is related to the structural parameters of rock excavating hook. Finally, the process of rock hooks with short drill rod impact is simulated by ANSYS- LS-DYNA software, and the influence of rock hook parameters on the propagation of impact force and stress wave is explained according to the post-processing results.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU63

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本文編號(hào)：2110270