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The vibration excitation transmission of the platform should be suppressed while ensuring the safe and reliable operation of equipment. Currently, most research on vibration reduction focuses on individual pedestals or pedestal-platform plate structures, with few studies comprehensively considering the relationship between equipment, pedestal, and platform bottom plate vibrations. ultra-deep water semi-submersible drilling platform equipment’s long base was taken as the research object and impedance analysis and optimization design technology was utilized to control input power flow of the platform bottom plate in key frequency bands. Design variables such as mass and stiffness were optimized to improve base plate thickness while maintaining support strength and stiffness. A coupling vibration control model for “equipment-pedestal-platform” was established, using a particle swarm optimization algorithm with linear weight decline for optimization. Finite element method verification results show that this technical process is feasible, reducing optimized input power flow by 95.43% in low frequencies below 300 Hz and decreasing total response level of vibration acceleration by 18.1 dB.
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基座作为连接设备和平台底板的结构,需在满足设备安全可靠运行的前提下,抑制平台底板振动激励传递。目前对于基座减振优化大多是针对基座单体或基座-底板结构,综合考量设备、基座和平台底板振动特性关系的研究较少。首先,以超深水半潜式钻井平台用典型设备的长基座为研究对象,采用阻抗分析和优化设计技术,以关键频段的平台底板输入功率流控制为设计目标。其次,在保证基座满足支撑强度、刚度且基座的结构形式不变的前提下,以基座质量和刚度为设计变量,对基座各板厚进行改进。建立了“设备-基座-底板”耦合振动控制优化设计模型,选用权重线性递减的粒子群算法为优化算法,并对基座实例开展减振优化设计。有限元方法验证结果显示,技术流程可行,且在1~300 Hz低频范围内优化后的平台底板输入功率流降低了95.43%,振动加速度总响应级降低了18.1 dB,为平台设备基座设计提供了一条可资借鉴的技术途径。
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孙旭(1999—),男,汉族,山东临沂人,硕士研究生。研究方向:振动噪声控制。E-mail:sdsunxu@163.com。
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孙旭(1999—),男,汉族,山东临沂人,硕士研究生。研究方向:振动噪声控制。E-mail:sdsunxu@163.com。
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2020., articleTitle=null, refAbstract=null)], funds=[Fund(id=1204542860684144887, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, awardId=U2006229, language=CN, fundingSource=国家自然科学基金(U2006229), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1204542853910344579, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, xref=null, ext=[AuthorCompanyExt(id=1204542853918733189, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, companyId=1204542853910344579, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=College of Engineering, Ocean University of China, Qingdao 266110, China), AuthorCompanyExt(id=1204542853927121799, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, companyId=1204542853910344579, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=中国海洋大学工程学院, 青岛 266110)])], figs=[ArticleFig(id=1204542856498229323, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=EN, label=Fig.1, caption=
Coupled vibration model of equipment-base-platform under harmonic excitation, figureFileSmall=p9fTYPMFVUthLNX8jY4OZA==, figureFileBig=m9LjjITXdeV06dz12qWqLg==, tableContent=null), ArticleFig(id=1204542856645029971, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=CN, label=图1, caption=
简谐激励下设备-基座-底板耦合振动模型, figureFileSmall=p9fTYPMFVUthLNX8jY4OZA==, figureFileBig=m9LjjITXdeV06dz12qWqLg==, tableContent=null), ArticleFig(id=1204542856796024923, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=EN, label=Fig.2, caption=
Comparison of thin plate response, figureFileSmall=F/mimL+XR1IEsxwFdC2JhA==, figureFileBig=e6xQzleb8sy7vi6jiW02/Q==, tableContent=null), ArticleFig(id=1204542857945264225, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=CN, label=图2, caption=
薄板响应对比, figureFileSmall=F/mimL+XR1IEsxwFdC2JhA==, figureFileBig=e6xQzleb8sy7vi6jiW02/Q==, tableContent=null), ArticleFig(id=1204542858180145258, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=EN, label=Fig.3, caption=
Long pedestal structure, figureFileSmall=AHCg6qjmY4ghtH/AnBDC2Q==, figureFileBig=tlmLzRr+Fr6SEJH6h+Gghg==, tableContent=null), ArticleFig(id=1204542858297585775, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=CN, label=图3, caption=
长基座结构, figureFileSmall=AHCg6qjmY4ghtH/AnBDC2Q==, figureFileBig=tlmLzRr+Fr6SEJH6h+Gghg==, tableContent=null), ArticleFig(id=1204542858402443377, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=EN, label=Fig.4, caption=
Comparison of impedance level curves of vibration isolation system before and after optimization, figureFileSmall=GKAe0k6tP7Zk5Xg5Y5rRlw==, figureFileBig=nYl2IJRZUpFnZjamT7BLpg==, tableContent=null), ArticleFig(id=1204542858545049722, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=CN, label=图4, caption=
优化前后隔振系统阻抗级曲线, figureFileSmall=GKAe0k6tP7Zk5Xg5Y5rRlw==, figureFileBig=nYl2IJRZUpFnZjamT7BLpg==, tableContent=null), ArticleFig(id=1204542858654101631, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=EN, label=Fig.5, caption=
Comparison of input power flow level curves of base plate before and after optimization, figureFileSmall=oCX3l8s/sgRXDCoJB04X+g==, figureFileBig=sp0NoG21XpnxOUCMFCK0LQ==, tableContent=null), ArticleFig(id=1204542858779930758, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=CN, label=图5, caption=
优化前后底板输入功率流级曲线, figureFileSmall=oCX3l8s/sgRXDCoJB04X+g==, figureFileBig=sp0NoG21XpnxOUCMFCK0LQ==, tableContent=null), ArticleFig(id=1204542858918342800, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=EN, label=Fig.6, caption=
Comparison of input impedance level curves of the base before and after improvement, figureFileSmall=PM220zx944i8IuTCg6eoqA==, figureFileBig=gxUmyHkmNZQTQKeCVK4VOg==, tableContent=null), ArticleFig(id=1204542859048366230, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=CN, label=图6, caption=
改进前后基座输入阻抗级曲线, figureFileSmall=PM220zx944i8IuTCg6eoqA==, figureFileBig=gxUmyHkmNZQTQKeCVK4VOg==, tableContent=null), ArticleFig(id=1204542859186778267, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=EN, label=Fig.7, caption=
Comparison of power flow level curves before and after the improved pedestal, figureFileSmall=/CUw1cryAjvWeiEZSeuHEw==, figureFileBig=CWus+Russ1uhnLXEL1QdXA==, tableContent=null), ArticleFig(id=1204542859287441569, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=CN, label=图7, caption=
改进基座前后功率流级曲线, figureFileSmall=/CUw1cryAjvWeiEZSeuHEw==, figureFileBig=CWus+Russ1uhnLXEL1QdXA==, tableContent=null), ArticleFig(id=1204542859404882090, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=EN, label=Fig.8, caption=
Comparison of floor vibration acceleration curve before and after improvement, figureFileSmall=/hYLJzBVShZxFbY7PGOl3A==, figureFileBig=7Gf/cs4UGVs2t0GgfeyQVg==, tableContent=null), ArticleFig(id=1204542859522322606, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=CN, label=图8, caption=
改进前后底板振动加速度级曲线, figureFileSmall=/hYLJzBVShZxFbY7PGOl3A==, figureFileBig=7Gf/cs4UGVs2t0GgfeyQVg==, tableContent=null), ArticleFig(id=1204542859589431474, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=EN, label=Table 1, caption=
Dimensions of pedestal
, figureFileSmall=null, figureFileBig=null, tableContent=
| 尺寸 | 取值/mm |
| 面板长、宽、厚 | 1 200、100、8 |
| 腹板长、宽、厚 | 1 500、100、6 |
| 肘板上边长、下边长、厚 | 60、110、6 |
| 肘板间距 | 240 |
), ArticleFig(id=1204542859685900473, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=CN, label=表1, caption=
基座尺寸
, figureFileSmall=null, figureFileBig=null, tableContent=
| 尺寸 | 取值/mm |
| 面板长、宽、厚 | 1 200、100、8 |
| 腹板长、宽、厚 | 1 500、100、6 |
| 肘板上边长、下边长、厚 | 60、110、6 |
| 肘板间距 | 240 |
), ArticleFig(id=1204542859799146689, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=EN, label=Table 2, caption=
Optimization results of pedestal parameters
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 优化前 | 优化后 |
| 质量/kg | 17.6 | 33.28 |
| 刚度/(N·m-1) | 1.54×109 | 2.82×109 |
| 总功率流/(N·m·s-1) | 1.75×10-3 | 8.01×10-5 |
), ArticleFig(id=1204542859945947339, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=CN, label=表2, caption=
基座参数优化结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 优化前 | 优化后 |
| 质量/kg | 17.6 | 33.28 |
| 刚度/(N·m-1) | 1.54×109 | 2.82×109 |
| 总功率流/(N·m·s-1) | 1.75×10-3 | 8.01×10-5 |
), ArticleFig(id=1204542860063387858, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=EN, label=Table 3, caption=
Comparison of plate thickness before and after pedestal improvement
, figureFileSmall=null, figureFileBig=null, tableContent=
| 初始模型/ mm | 改进模型/ mm |
| 面板厚度 | 8 | 15 |
| 腹板厚度 | 6 | 10 |
| 肘板厚度 | 6 | 10 |
), ArticleFig(id=1204542860172439765, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=CN, label=表3, caption=
基座改进前后各板厚对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 初始模型/ mm | 改进模型/ mm |
| 面板厚度 | 8 | 15 |
| 腹板厚度 | 6 | 10 |
| 肘板厚度 | 6 | 10 |
), ArticleFig(id=1204542860302463197, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=EN, label=Table 4, caption=
Total RMS vibration acceleration level of each frequency band of the output point group
, figureFileSmall=null, figureFileBig=null, tableContent=
| 频段/Hz | 模型输出点群均方根振动加速度总级对比 |
| 初始模型/ dB | 优化模型/ dB | 相对减少率/% |
| 10~100 | 139.24 | 112.60 | 19.13 |
| 100~200 | 117.45 | 116.57 | 0.75 |
| 200~300 | 136.03 | 121.16 | 10.93 |
| 10~300 | 140.95 | 122.88 | 12.82 |
), ArticleFig(id=1204542860398932195, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1156907873310692258, language=CN, label=表4, caption=
输出点群各频段均方根振动加速度总响应级
, figureFileSmall=null, figureFileBig=null, tableContent=
| 频段/Hz | 模型输出点群均方根振动加速度总级对比 |
| 初始模型/ dB | 优化模型/ dB | 相对减少率/% |
| 10~100 | 139.24 | 112.60 | 19.13 |
| 100~200 | 117.45 | 116.57 | 0.75 |
| 200~300 | 136.03 | 121.16 | 10.93 |
| 10~300 | 140.95 | 122.88 | 12.82 |
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