本文選題：自升式海洋平臺 + 傳動系統(tǒng)��； 參考：《大連理工大學》2015年碩士論文

【摘要】：隨著陸地石油開采的枯竭,進入海洋開采成為主流,目前主要在150米水深以內范圍,而自升式海洋平臺以其獨特的優(yōu)勢在近海油氣勘探開采中居主力軍地位。升降傳動系統(tǒng)在自升式平臺中占據不可替代的關鍵地位,它的性能直接影響工程船舶在使用過程中的優(yōu)劣,甚至影響到平臺的作業(yè)和可變載荷。目前國內外的自升式平臺升降傳動系統(tǒng)主要由國外廠家所生產,因此對自升式平臺升降傳動系統(tǒng)關鍵技術研究顯得尤為重要。本文以某300ft自升式海洋平臺升降傳動系統(tǒng)為研究對象,指出其減速器設計結構不足之處,并對其結構進行改進,利用動力學理論研究混合式齒輪傳動系統(tǒng)動態(tài)響應,然后通過解析法和數值計算方法分析超大模數齒輪齒條強度及其承載能力影響因素,最后為驗證前述計算方法的正確性,本文構建了300ft自升降傳動系統(tǒng)齒輪齒條實驗研究平臺,對超大模數齒輪齒條齒根部位應力值進行實測,具體研究內容如下：(1)通過分析自升式平臺混合式行星齒輪傳動系統(tǒng)傳統(tǒng)設計結構形式,指出其不足之處,將其結構改進為一種差動式行星齒輪傳動結構形式,實現單輸入雙輸出,并根據設計要求,給出平行軸系和差速級齒輪的主要參數,建立平行軸輪系和差速級齒輪三維模型。(2)綜合考慮時變嚙合剛度、嚙合誤差、嚙合阻尼、支撐剛度和阻尼等,根據集中參數法建立自升式平臺升降裝置齒輪傳動系統(tǒng)動力學模型,利用牛頓第二定律建立其動力學微分方程,并給出計算動力學微分方程時,相關參數的計算方法,其中主要給出超大模數齒輪齒條的嚙合剛度計算方法。在恒載激勵下,利用MATLAB求解動力學微分方程得到各級齒輪的振動位移響應。(3)首先以材料力學為理論基礎,給出超大模數齒輪齒根危險截面應力不同計算方法,然后采用數值計算方法對大模數齒輪齒條進行動、靜態(tài)特性研究,得到齒輪齒條嚙合過程中應力的變化規(guī)律,將分析得到彎曲應力值與解析法計算結果比較,驗證其準確性,最后對比考慮連接軸和不考慮連接軸得到的計算結果,說明連接軸對齒根彎曲應力的影響。(4)建立自升式平臺升降系統(tǒng)齒輪傳動實驗臺,在其升降過程中采集大模數齒輪齒條齒根部位應變、應力及齒條振動加速度,得到大模數齒輪齒條齒根部位危險截面受拉側和受壓側應力變化規(guī)律,并將其所得結果與數值計算結果進行對比,驗證有限元方法計算超大模數齒輪齒根彎曲強度的可靠性。
[Abstract]:With the exhaustion of land oil exploitation, it is the main stream to enter the ocean mining. At present, it is mainly within 150 meters of water depth, and the self lift offshore platform occupies the main position in the offshore oil and gas exploration and exploitation with its unique advantages. The lift drive system occupies an irreplaceable key position in the jack up platform, and its performance directly affects the work. The advantages and disadvantages of the ship in the process of use even affect the operation of the platform and the variable load. At present, the lifting system of the jack up platform is mainly produced by the foreign manufacturers. Therefore, it is particularly important to study the key technology of the lifting system of the jack up platform. In this paper, a 300ft jack up and lifting system of a jack up platform is used in this paper. As the research object, the paper points out the shortcomings of the design structure of the reducer, improves its structure, studies the dynamic response of the hybrid gear transmission system by the dynamics theory, and then analyzes the influence factors of the strength and bearing capacity of the super large modulus gear rack and its bearing capacity through the analytical and numerical methods. Finally, the previous calculation method is verified. In this paper, the experimental research platform of 300ft self lifting and lifting gear rack and rack is constructed, and the stress values of the super large modulus gear rack and rack are measured. The specific research contents are as follows: (1) through the analysis of the traditional structure form of the hybrid planetary gear drive system of the self lifting platform, the shortcomings are pointed out, and its structure is changed. In the form of a differential planetary gear transmission structure, a single input and double output is realized and the main parameters of parallel shafting and differential gear are given according to the design requirements. A three dimensional model of parallel axle gear train and differential gear is set up. (2) considering the time-varying meshing stiffness, meshing error, meshing damping, support stiffness and damping, and so on. The dynamic model of the gear drive system of the lifting platform is established by the medium parameter method. The differential equation of the dynamics is established by Newton's second law, and the calculation method of the related parameters is given in the calculation of the differential equation of the dynamics. The calculation method of the meshing stiffness of the gear rack of the superlarge modulus is mainly given. Under the constant load, the MA is used. TLAB solves the vibration displacement response of gears at all levels by solving dynamic differential equations. (3) first of all, based on the theory of material mechanics, the different calculation methods of the stress section stress of the superlarge modulus gear teeth are given. Then the numerical calculation method is used for the action of the large modulus gear rack and the static state characteristics, and the gear rack meshing process should be obtained. The variation law of the force is compared with the calculated results of the bending stress and the analytical method, and the accuracy is verified. Finally, the calculation results of the connecting shaft and the connection axis are taken into account, and the effect of the connecting shaft on the bending stress of the tooth root is explained. (4) a gear drive test bench for the lifting and descending system of the jack up platform is set up in the process of lifting and lifting. The strain, stress and vibration acceleration of the tooth root of the gear rack and rack of the large modulus gear rack and rack are obtained, and the stress variation law of the dangerous cross section of the tooth root of the large model teeth is obtained, and the results are compared with the numerical calculation results, and the reliability of the finite element method is verified to calculate the bending strength of the tooth root of the super large modulus gear.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE951

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本文編號：2077447