本文關(guān)鍵詞： 桁架主梁 有限元分析 振動仿真 PDS　出處：《遼寧科技大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著我國運輸業(yè)的蓬勃發(fā)展,作為重要設(shè)備的起重機(jī)械向著高速、重載方向發(fā)展,因此對機(jī)械的性能要求越來越高。起重機(jī)械工作頻繁,大多數(shù)情況下承受的是動載荷。其焊接鋼結(jié)構(gòu)會突然斷裂,導(dǎo)致在災(zāi)難性的設(shè)備事故和人身傷亡。對起重機(jī)而言,主梁是起重機(jī)中重要的金屬結(jié)構(gòu)。其承載能力往往決定著起重機(jī)的主要性能。因此,對起重機(jī)主梁的性能研究是必要的。本課題就是在背景下提出來的,。 本文以某廠的抓斗式門式起重機(jī)為研究對象,其主梁是桁架式的。對其進(jìn)行工況分析,確定桁架主梁在每個工況下的應(yīng)力、應(yīng)變分布,從而確定最大應(yīng)變、最大應(yīng)力的位置。通過對模型的動態(tài)分析,給出了前15階固有頻率值及前三階的固有振型,為以后起重機(jī)主梁的改造提供必要的參考。 在工程中存在大量的不確定性,不確定性是自然界各種事物固有的特性。利用ANSYS的PDS(可靠性分析)對桁架主梁模型的分析,知道了哪些輸入?yún)?shù)對桁架主梁的性能影響的程度,并利用可靠性指標(biāo)對分析結(jié)果進(jìn)行判斷,從而提高分析的準(zhǔn)確性。 利用MATLAB的Simulink的仿真功能,模擬出桁架主梁的振動速度,結(jié)果與實際測量結(jié)果相吻合,證明仿真是可靠的。
[Abstract]:With the rapid development of China's transportation industry, the crane, as an important equipment, is developing towards the direction of high speed and heavy load, so the performance of the machinery is required more and more, and the crane works frequently. In most cases, the load is dynamic. The welded steel structure will suddenly break, resulting in catastrophic equipment accidents and casualties. For cranes. The main beam is an important metal structure in the crane, and its bearing capacity often determines the main performance of the crane. Therefore, it is necessary to study the performance of the main girder of the crane. This paper takes the grab gantry crane of a factory as the research object, its main beam is truss type. The working condition analysis is carried out to determine the stress and strain distribution of the truss main girder under each working condition, thus the maximum strain is determined. The position of maximum stress. Through dynamic analysis of the model, the first 15 natural frequencies and the first three natural modes are given, which provides a necessary reference for the reconstruction of crane main beam in the future. There are a lot of uncertainties in engineering, uncertainty is the inherent characteristic of all kinds of things in nature. The ANSYS (reliability analysis) is used to analyze the truss main beam model. The degree of influence of the input parameters on the performance of the truss girder is known, and the reliability index is used to judge the results of the analysis so as to improve the accuracy of the analysis. The vibration velocity of the truss girder is simulated by using the simulation function of Simulink of MATLAB. The results are in good agreement with the actual measurement results, and it is proved that the simulation is reliable.
【學(xué)位授予單位】：遼寧科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH213.5

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 丁保安;基于APDL的門式起重機(jī)有限元分析及優(yōu)化系統(tǒng)研究[D];武漢理工大學(xué);2012年

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本文編號：1476359