(1. 湖南城市學(xué)院 機(jī)械與電氣工程學(xué)院，益陽(yáng) 413000；
2. 中國(guó)石油大學(xué)(華東) 海洋油氣裝備與安全技術(shù)研究中心，青島 266580；
3. 長(zhǎng)沙礦山研究院有限責(zé)任公司 海洋采礦研究所，長(zhǎng)沙 410012；
4. 長(zhǎng)沙礦冶研究院有限責(zé)任公司 深海礦產(chǎn)資源開發(fā)利用技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室，長(zhǎng)沙 410012)
摘 要: 海洋內(nèi)波對(duì)中間倉(cāng)海上收放作業(yè)的安全帶來了極大挑戰(zhàn)。基于有限元方法建立了內(nèi)波和海流聯(lián)合作用下中間倉(cāng)單體收放過程的有限元分析模型，并采用Newmark法對(duì)模型進(jìn)行了數(shù)值求解，分析了中間倉(cāng)收放過程中的沖擊響應(yīng)以及管柱形態(tài)、張力、等效應(yīng)力、上部轉(zhuǎn)角和月池處偏移等因素。結(jié)果表明：在各項(xiàng)因素中，頂部張力受內(nèi)波影響小，等效應(yīng)力、上部轉(zhuǎn)角和月池處偏移受內(nèi)波影響大；收放作業(yè)過程中硬管等效應(yīng)力最大位置發(fā)生于懸掛點(diǎn)附近；上部轉(zhuǎn)角和月池處偏移是影響作業(yè)安全的限制因素，內(nèi)波上層流方向與海流同向工況是實(shí)施收放作業(yè)的危險(xiǎn)工況，中間倉(cāng)入水0~300 m深度是收放過程的危險(xiǎn)深度區(qū)域。
關(guān)鍵字: 深海采礦；中間倉(cāng)；內(nèi)波；有限元分析
（1. School of Mechanical and Electrical Engineering, Hunan City University, Yiyang 413000, China;
2. Centre for Offshore Engineering and Safety Technology, China University of Petroleum, Qingdao 266580, China;
3. Ocean Mining Research Institute, Changsha Research Institute of Mining and Metallurgy Co., Ltd., Changsha 410012, China;
4. State Key Laboratory of Exploitation and Utilization of Deep-Sea Mineral Resources, Changsha Research Institute of Mining and Metallurgy Co., Ltd., Changsha 410012, China）
Abstract:The marine internal waves have brought great challenges to the safety of deep-sea mining buffer retrieve/deployment operations. Based on the finite element method, a finite element model of the buffer retrieve/deployment operations under the combined action of internal waves and currents was established, and the Newmark method was used to solve the model. The transient response and factors, such as string shape, tension, equivalent stress, upper rotation and offset, at the moon pool position in the retrieve/deployment process of the buffer were analyzed. The results show that, among the factors, the equivalent stress, upper rotation and offset at the moon pool position are greatly affected by internal waves while the top tension is less affected by internal waves. The maximum equivalent stress of hard pipe occurs near the suspension point; the upper rotation and offset at the moon pool position are the limiting factors affecting operation safety. The condition that the internal wave combined with the same direction current is the dangerous condition for the buffer retrieve/deployment operations, and the stage that the buffer stayed in the water depth range of 0-300 m is the dangerous stage.
Key words: deep-sea mining; buffer; internal solitary wave; finite element analysis
