本文選題：履帶起重機(jī) + 履帶架與地面計算模型　； 參考：《吉林大學(xué)》2012年碩士論文

【摘要】：近年來，國內(nèi)外吊裝行業(yè)對中大起升噸位起重機(jī)需求較為強(qiáng)勁，這種局面對國內(nèi)履帶起重機(jī)行業(yè)來說是前所未有的機(jī)遇，然而國內(nèi)履帶起重機(jī)行業(yè)也面臨著巨大的挑戰(zhàn)，因為工業(yè)設(shè)備日趨大型化并且現(xiàn)代工程項目對履帶起重機(jī)產(chǎn)品的使用安全性要求越來越嚴(yán)格，而國內(nèi)履帶起重機(jī)產(chǎn)品設(shè)計方法和加工工藝仍不成熟，設(shè)計的產(chǎn)品仍存在潛在的質(zhì)量問題，再則國產(chǎn)履帶起重機(jī)產(chǎn)品相對國外同級別履帶起重機(jī)產(chǎn)品來看，，整機(jī)重量普遍較重，制造成本高。 國內(nèi)履帶起重機(jī)設(shè)計方法在驗證安全性和可靠性環(huán)節(jié)一般采用解析法來校核整機(jī)安全性，這種技術(shù)在校核履帶起重機(jī)臂架方面應(yīng)用得比較成熟和完善，在校核履帶起重機(jī)轉(zhuǎn)臺及下車結(jié)構(gòu)方面并沒有標(biāo)準(zhǔn)和成熟的衡量公式，已有的利用有限元方法核算履帶起重機(jī)轉(zhuǎn)臺和下車安全性的研究方法仍存在不足和沒有相關(guān)的實驗數(shù)據(jù)驗證其有效性和合理性，因此利用解析法或已有的有限元研究方法都無法準(zhǔn)確對設(shè)計的履帶起重機(jī)轉(zhuǎn)臺和下車的安全性與可靠性做出評估。 履帶起重機(jī)輕量化是目前履帶起重機(jī)行業(yè)的發(fā)展趨勢，它不僅能夠幫助企業(yè)降低制造成本，而且對于節(jié)能環(huán)保也具有重要的意義。當(dāng)前輕量化技術(shù)一般采用有限元法對結(jié)構(gòu)進(jìn)行優(yōu)化設(shè)計，而且對一些簡單結(jié)構(gòu)也能夠取得較好的輕量化效果，然而輕量化效果和輕量化后的結(jié)構(gòu)安全性都立足于設(shè)計的計算模型是否準(zhǔn)確。 本文研究的內(nèi)容以吉林大學(xué)力學(xué)實驗室與徐工建設(shè)機(jī)械分公司合作的履帶起重機(jī)轉(zhuǎn)臺及下車輕量化設(shè)計課題為依托。 論文的主要工作和研究成果如下： （1）概述了履帶起重機(jī)行業(yè)的國內(nèi)外發(fā)展現(xiàn)狀，分析了履帶起重機(jī)未來的機(jī)遇和挑戰(zhàn)，分析了目前履帶起重機(jī)下車?yán)碚撗芯砍晒膬?yōu)點和缺點以及亟待解決的問題，提出了履帶起重機(jī)履帶架與地面新的研究方法。 （2）簡單介紹了本文研究的對象的結(jié)構(gòu)特點，對有限元軟件ANSYS進(jìn)行了學(xué)習(xí)和實踐，編寫了論文研究所用到的多工況批處理計算程序，該程序能夠完成有限元計算和有限元計算結(jié)果自動化處理，能大量地節(jié)省計算時間和結(jié)果處理時間。 （3）利用有限元軟件ANSYS分別建立了分析履帶架和車架強(qiáng)度剛度用的單體研究模型，桿系結(jié)構(gòu)地面計算模型和鋼筋混凝土地面計算模型，利用三種計算模型分別對履帶架和車架進(jìn)行了強(qiáng)度剛度分析，并對比了三種研究模型的有效性和先進(jìn)性。 （4）對履帶起重機(jī)下車進(jìn)行了應(yīng)力測試，獲得了履帶起重機(jī)下車在實驗工況下應(yīng)力數(shù)據(jù)，并與有限元計算結(jié)果進(jìn)行了對比。履帶架測試實驗結(jié)果表明，鋼筋混凝土地面計算模型與應(yīng)力實驗數(shù)據(jù)更吻合，其次是桿系結(jié)構(gòu)地面計算模型，最后是履帶架單體計算模型。車架測試實驗結(jié)果表明，鋼筋混凝土地面計算模型與桿系結(jié)構(gòu)地面計算模型都與實驗數(shù)據(jù)基本吻合。 （5）本文研究的履帶架和車架實際重量比國內(nèi)外其他同級產(chǎn)品都重。為了提高產(chǎn)品的競爭力，降低制造成本和吸引客戶，本文利用鋼筋混凝土地面計算模型分別對履帶架和車架進(jìn)行了輕量化設(shè)計，并對輕量化后的履帶架和車架進(jìn)行了強(qiáng)度剛度分析。履帶架和車架輕量化設(shè)計后重量分別減少了7.8%和6.68%，輕量化后的履帶架和車架滿足強(qiáng)度和剛度要求。輕量化后的履帶架和車架不僅降低了制造成本，而且間接地降低了運輸油耗，提高了產(chǎn)品競爭力。
[Abstract]:In recent years, the demand for lifting tonnage cranes at home and abroad is stronger at home and abroad, which is an unprecedented opportunity for the domestic caterpillar crane industry. However, the domestic caterpillar crane industry is also facing great challenges because of the increasing industrial equipment and the modern engineering project for caterpillar crane products. The demand for safety is more and more strict, but the design method and processing technology of the domestic crawler crane are still not mature, and the product still has the potential quality problems. Then, compared with the foreign same level crawler crane products, the domestic crawler crane products are generally heavier and the manufacturing cost is high.
The design method of domestic crawler crane is generally adopted to check the safety of the whole machine in the verification of safety and reliability. This technology is more mature and perfect in the arm frame of the nuclear crawler crane. There is no standard and mature measurement formula for the turntable and getting off structure of the nuclear caterpillar crane. The research method of calculating the safety of track crane turntable and getting off with finite element method still has insufficient and no related experimental data to verify its validity and rationality. Therefore, the safety and reliability of the designed caterpillar crane can not be evaluated accurately by the analytical method or the existing finite element method. Estimate.
The lightweight of crawler crane is the development trend of the caterpillar crane industry at present. It can not only help enterprises to reduce the cost of manufacturing, but also is of great significance for energy conservation and environmental protection. At present, the finite element method is used to optimize the design of the structure, and a better light weight can be obtained for some simple structures. However, the lightweight effect and the structural safety after lightweight are all based on the accuracy of the design calculation model.
The contents of this paper are based on the subject of the caterpillar turntable and the lightening design project of the Jilin University mechanics laboratory and the construction machinery branch of Xugong.
The main work and research results of this paper are as follows:
(1) the development status of the caterpillar crane industry at home and abroad is summarized, the future opportunities and challenges of the crawler crane are analyzed. The advantages and disadvantages of the theoretical research results of the caterpillar crane and the problems to be solved are analyzed. The new research methods of caterpillar crane caterpillar frame and the ground are put forward.
(2) the structure characteristics of the object are briefly introduced. The finite element software ANSYS is studied and practice, and the batch processing calculation program used in the paper is written. The program can complete the finite element calculation and the automatic processing of the finite element calculation results, and can save the calculation time and the result processing time in a large amount.
(3) using the finite element software ANSYS to establish the single body research model for the strength stiffness of the caterpillar frame and frame, the ground calculation model of the rod system and the calculation model of the reinforced concrete ground, and the strength stiffness analysis of the caterpillar frame and the frame respectively by three kinds of calculation models, and compare the validity and first of the three research models. Progressive.
(4) the stress test of the caterpillar crane is carried out, and the stress data of the crawler crane under the experimental condition is obtained and compared with the result of the finite element calculation. The test results of the crawler frame show that the calculation model of the reinforced concrete ground is more consistent with the stress experimental data, and the next is the ground calculation model of the rod structure, finally, the calculation model of the structure of the bar system is finally made. It is a single calculation model of a caterpillar frame. The test results of the frame test show that the calculation model of the reinforced concrete ground and the ground calculation model of the rod system are all in agreement with the experimental data.
(5) the actual weight of the caterpillar frame and frame is heavier than the other domestic and foreign products. In order to improve the competitiveness of the products, reduce the manufacturing cost and attract customers, this paper uses the reinforced concrete ground calculation model to carry out the lightweight design of the caterpillar frame and frame respectively, and has carried out the strength of the lightweight caterpillar frame and frame. After the lightweight design of the track frame and frame, the weight of the caterpillar frame and frame is reduced by 7.8% and 6.68% respectively. The lightweight caterpillar frame and frame meet the requirements of strength and stiffness. The lightweight crawler frame and frame not only reduce the manufacturing cost, but also reduce the transportation fuel consumption, and raise the competitiveness of the product.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH213.7

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 張輝;超重型道路清障車結(jié)構(gòu)分析與實驗研究[D];吉林大學(xué);2013年

本文編號：1940723