本文選題：港口輪胎式起重機(jī) + 自由落鉤��； 參考：《武漢理工大學(xué)》2011年碩士論文

【摘要】：港口輪胎式起重機(jī)作業(yè)時,為了提高裝卸速度,通過外漲帶和貨物重力控制貨物下降速度,即自由落鉤,這會使貨物下降速度在很短的時間內(nèi)速度迅速增大,大大提高了貨物的裝卸速度。由于貨物具有較大的慣性,這時進(jìn)行自由落鉤制動產(chǎn)生的加速度,很可能對整機(jī)金屬結(jié)構(gòu)及整機(jī)穩(wěn)定性產(chǎn)生致命的影響,在實際生產(chǎn)過程中也出現(xiàn)過自由落鉤制動過程中整機(jī)傾覆的案例。 本文充分考慮自由落鉤的影響,從理論上分析并得出自由落鉤過程各個階段響應(yīng),并對結(jié)果進(jìn)行分析,得出較成熟的理論,為輪胎式起重機(jī)的動態(tài)特性研究做出一些有益的探索。論文的主要工作包括以下幾個方面： (1)運用有限元分析軟件ANSYS對選定輪胎式起重機(jī)金屬結(jié)構(gòu)進(jìn)行實體建模,并對其模型進(jìn)行靜力學(xué)分析。 (2)詳細(xì)分析輪胎式起重機(jī)自由落鉤過程,將自由落鉤過程分為兩個階段。運用少自由度模型法,對實際系統(tǒng)結(jié)構(gòu)進(jìn)行合理的簡化,建立少自由度,自由落鉤系統(tǒng)的動力學(xué)模型。充分考慮金屬結(jié)構(gòu)的強(qiáng)度、剛度和穩(wěn)定性,選取合適的控制條件,并通過實例求解,求得在動態(tài)激勵下各階段臂架及貨物位移及速度響應(yīng)曲線。 (3)分析自由落鉤過程對鋼絲繩動張力的影響,通過特例求解,得出在自由落鉤過程中鋼絲繩動張力的變化情況。討論變幅度、變臂長對自由落鉤動態(tài)特性的影響。通過分析18m臂各幅度和臂架仰角50°時各臂長自由落鉤動態(tài)特性的分析比較,得出鋼絲繩動張力的變化規(guī)律。 (4)詳細(xì)分析自由落鉤過程對起重機(jī)整機(jī)穩(wěn)定性的影響。通過對特定臂長和幅度自由落鉤的分析,找出自由落鉤對起重機(jī)抗傾覆穩(wěn)定性的影響。針對港口輪胎式起重機(jī)起重能力特點,分析了變幅度、變臂長自由落鉤時對起重機(jī)抗傾覆穩(wěn)定性的影響,從中找出變化規(guī)律,為起重機(jī)自由落鉤控制提出建議。
[Abstract]:In order to increase the loading and unloading speed of the port tyre crane, the drop speed of the cargo is controlled by the outer belt and the cargo gravity, that is, the free hook, which will make the drop speed of the cargo increase rapidly in a very short time. The loading and unloading speed of cargo has been greatly improved. Due to the greater inertia of the goods, the acceleration caused by the free hook braking is likely to have a fatal effect on the metal structure and stability of the whole machine. In the actual production process, there have been cases of the whole machine overturning in the process of free hook braking. In this paper, the effect of free hook is fully considered, and the response of each stage of free hook is theoretically analyzed, and the results are analyzed, and a more mature theory is obtained. Some useful exploration is made for the study of the dynamic characteristics of the tire crane. The main work of the thesis includes the following aspects: 1) the finite element analysis software ANSYS is used to model the metal structure of the selected tire crane, and the static analysis of the model is carried out. 2) the free hook process of tire crane is analyzed in detail, and the free hook process is divided into two stages. By using the model method of less degree of freedom, the structure of the actual system is reasonably simplified, and the dynamic model of the system with less degree of freedom and free hook is established. Considering the strength, stiffness and stability of the metal structure, the appropriate control conditions are selected, and the response curves of the boom and cargo displacement and velocity in each stage under dynamic excitation are obtained by an example. 3) the influence of the free hook process on the dynamic tension of wire rope is analyzed, and the change of the dynamic tension of wire rope during the process of free falling hook is obtained by solving the special case. The effects of varying amplitude and arm length on the dynamic characteristics of the free hook are discussed. Through the analysis and comparison of the dynamic characteristics of each arm length free fall hook when the amplitude of 18m arm and the angle of elevation of arm are 50 擄, the variation law of dynamic tension of wire rope is obtained. 4) the influence of the free hook process on the stability of the crane is analyzed in detail. Based on the analysis of the specific arm length and amplitude of the free hook, the influence of the free hook on the anti-overturning stability of the crane is found out. According to the characteristics of hoisting capacity of port tire crane, the influence of varying amplitude and length of arm on the stability of crane against overturning is analyzed, and the variation law is found out, and some suggestions are put forward for the control of crane free hook.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH213.6

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前2條

1 楊萍;沖擊載荷作用下登高平臺消防車動態(tài)響應(yīng)研究[D];大連理工大學(xué);2012年

2 谷紅學(xué);鋼絲繩變幅起重機(jī)臂架系統(tǒng)事故墜落失效分析[D];武漢理工大學(xué);2012年

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本文編號：1824959