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落锚撞击作用下沉箱防护结构顶盖损伤特性研究
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作者 徐万海 李明鎏 +1 位作者 贺子琪 李兆旭 《哈尔滨工程大学学报》 北大核心 2025年第1期56-62,共7页
针对沉箱防护设施的顶盖在落锚撞击作用下的结构损伤问题,本文对沉箱顶盖的撞击损伤特性进行研究,采用有限元对沉箱式防护结构顶盖的撞击损伤特性进行模拟研究,通过对沉箱顶盖进行原尺寸建模,利用落锚碰撞试验验证数值模型的正确性和精... 针对沉箱防护设施的顶盖在落锚撞击作用下的结构损伤问题,本文对沉箱顶盖的撞击损伤特性进行研究,采用有限元对沉箱式防护结构顶盖的撞击损伤特性进行模拟研究,通过对沉箱顶盖进行原尺寸建模,利用落锚碰撞试验验证数值模型的正确性和精度,分析开孔对顶盖撞击损伤特性的影响机制。研究结果表明:落锚撞击位置不邻接开孔时,最大撞击应力出现在撞击位置处,沉箱防护结构整体沉降高度略小,撞击位置处出现的塑性应变较大;落锚撞击位于开孔集中的区域时,开孔附近会产生较大的应力集中,沉箱防护结构整体沉降高度略微增大,撞击位置处出现的塑性应变较小。 展开更多
关键词 沉箱防护结构 落锚撞击 撞击损伤 数值模拟
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Calculation mode of side friction for large open caisson 被引量:2
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作者 欧阳效勇 赵文光 +1 位作者 李进 李松 《Journal of Southeast University(English Edition)》 EI CAS 2015年第1期130-136,共7页
To overcome the problems in design methodologies and construction control measures for the large open caisson, systematic research was conducted on the side friction calculation mode of the large open caisson. Based o... To overcome the problems in design methodologies and construction control measures for the large open caisson, systematic research was conducted on the side friction calculation mode of the large open caisson. Based on the field monitoring data of lateral soil pressure on the side wall of the open caisson for the southern anchorage of the Maanshan Yangtze River Highway Bridge, the statistical result of the side friction under different buried depths of the cutting edge of the open caisson was back-analyzed; and the side friction distribution of the large open caisson was underlined. The analysis results indicate that when the buried depth of the cutting edge is smaller than a certain depth H0, the side friction linearly increases with the increase in the buffed depth. However, as the buffed depth of the cutting edge is larger than H0, the side friction shows a distribution with small at both ends and large in the middle. The top of the distribution can be regarded as a linear curve, while the bottom as a hyperbolic curve. As the buffed depth of cutting edge increases continuously, the peak value of the side friction linearly increases and the location of the peak value gradually moves down. Based on the aforementioned conclusions, a revised calculation mode of the large open caisson is presented. Then, the calculated results are compared with the field monitoring data, which verifies the feasibility of the proposed revised calculation mode. 展开更多
关键词 large open caisson side friction distributiondiagram calculation mode
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两种声呐系统应用于沉井测量的对比分析
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作者 王嘉伟 尤相骏 +2 位作者 杨朝禹 王张江尧 沈蔚 《测绘通报》 北大核心 2025年第1期175-179,共5页
现代城市重大工程勘测和地下排水管网调查中,大型污水沉井测量是一项重要且有困难的工作。传统的蛙人下井探摸方式,因其危险系数高、测量误差较大而逐渐被高精度声呐探测系统代替。为实现高精度、高效率的大型污水沉井测量,本文开发了... 现代城市重大工程勘测和地下排水管网调查中,大型污水沉井测量是一项重要且有困难的工作。传统的蛙人下井探摸方式,因其危险系数高、测量误差较大而逐渐被高精度声呐探测系统代替。为实现高精度、高效率的大型污水沉井测量,本文开发了一套多波束声呐沉井测量系统,并将其与双轴扫描声呐测量系统从多个角度对比分析。试验结果表明,多波束声呐测量系统重量轻、体积小、精度高、外业测量效率高、获得点云密度高,能够快速获取蓄水沉井的井室和进出水口三维形态。随着技术的进步,声呐测量系统将成为管道、沉井、空洞区等城市地下蓄水空间测量的有效工具。 展开更多
关键词 沉井测量 多波束声呐 双轴扫描声呐 三维点云 精度 效率
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吸力基础沉贯及拔出可视化模型实验系统研发及应用
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作者 李大勇 吴沁儒 张雨坤 《实验技术与管理》 北大核心 2025年第1期59-65,共7页
吸力基础广泛应用于海洋工程,其沉贯至海床预定位置是承载力达到设计要求的前提条件。阐明吸力基础沉贯过程中与土体的宏细观相互作用,有助于揭示吸力基础沉贯机理,探究沉贯阻力和所需吸力的计算理论。该文研发了吸力基础沉贯及拔出可... 吸力基础广泛应用于海洋工程,其沉贯至海床预定位置是承载力达到设计要求的前提条件。阐明吸力基础沉贯过程中与土体的宏细观相互作用,有助于揭示吸力基础沉贯机理,探究沉贯阻力和所需吸力的计算理论。该文研发了吸力基础沉贯及拔出可视化模型实验系统,由高精度伺服加载装置、非嵌入式测量模块和可视化模型箱组成。该系统不仅能够实时捕捉并展示土体位移场、基础位移量、受力状态等关键参数,而且通过可视化手段,极大地提高了实验教学的直观性和科研工作的精确性。介绍了系统的组成、功能和操作方法,并开展可视化实验研究了加劲肋吸力基础沉贯过程中的阻力变化、土塞隆起及土体流动规律。实验发现加劲肋吸力基础的沉贯阻力、土塞隆起速度和高度均大于传统吸力基础,且土体以向基础内部流动为主,在加劲肋间空腔内出现土体回流现象。实验结果表明该系统能够有效地模拟吸力基础在不同条件下的沉贯及拔出过程,为研究其与土体相互作用提供了新的视角和方法,有助于提升教学效率、促进科研创新及指导工程实践。 展开更多
关键词 吸力基础 沉贯及拔出 可视化 模型实验 土体流动
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北口大桥锚碇沉井施工技术研究及应用
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作者 宋庆仁 刘小勇 董伟 《施工技术(中英文)》 2025年第1期145-149,共5页
温州瓯江北口大桥为主跨2×800m的三塔四跨连续双层钢桁梁悬索桥,南岸陆上重力式锚碇采用沉井基础。在淤泥质土施工承载力低、黏聚性高、灵敏度高的不利条件下,建立“有效应力-含水率-承载力”的作用模型,优化砂桩置换率算法;排水... 温州瓯江北口大桥为主跨2×800m的三塔四跨连续双层钢桁梁悬索桥,南岸陆上重力式锚碇采用沉井基础。在淤泥质土施工承载力低、黏聚性高、灵敏度高的不利条件下,建立“有效应力-含水率-承载力”的作用模型,优化砂桩置换率算法;排水下沉通过支垫抽除模拟试验及工艺数值分析,研发支撑体系分级转化的开挖下沉方案;研制四绞刀空气吸泥和钻机+移动台车两种设备,保证取土下沉效率。 展开更多
关键词 桥梁工程 沉井 基础 淤泥质土 加固 控制
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富水地区深基坑支护技术综合运用
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作者 刘三平 《工程建设与设计》 2025年第1期68-70,共3页
结合某城区基坑支护工程对富水地区深基坑支护技术的综合运用进行详细介绍。通过分析工程概况和地质条件,提出采用“护坡桩+预应力锚杆”支护体系、“复合土钉墙”支护体系、“土钉墙”支护体系及“放坡挂网喷锚”支护体系分区分段支护... 结合某城区基坑支护工程对富水地区深基坑支护技术的综合运用进行详细介绍。通过分析工程概况和地质条件,提出采用“护坡桩+预应力锚杆”支护体系、“复合土钉墙”支护体系、“土钉墙”支护体系及“放坡挂网喷锚”支护体系分区分段支护,并提出基坑支护的施工要点和要求,监测结果显示支护段最大竖向变形出现在基坑东北侧的4b-4b、4c-4c支护段。 展开更多
关键词 基坑支护 地下水 灌注桩 土钉墙
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Tapered Suction Caissons:A Numerical Investigation into Their Pull-out Performance 被引量:5
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作者 M.Zeinoddini J.Keyvani M.Nabipour 《China Ocean Engineering》 SCIE EI 2009年第4期695-707,共13页
Suction caissons have been widely used as anchors and foundations for floating and fixed offshore platforms. The pull-out performance of conventional suction caissons (with upright walls) has been investigated by a ... Suction caissons have been widely used as anchors and foundations for floating and fixed offshore platforms. The pull-out performance of conventional suction caissons (with upright walls) has been investigated by a number of researchers. However, no attention has been paid to tapered suction caissons. This paper deals with the performance of tapered suction caissons under vertical pull-out loads. A numerical approach is used for this purpose. The numerical model is first verified against test data available for common upright caissons. The verified model is then used to study the pullout performance of tapered suction caissons. It is noticed that the pull-out capacities exhibited by tapered suction caissons are in general considerably higher than those from their corresponding traditional upright caissons. To obtain an insight into this superior behaviour, effects from certain soil/caisson/drainage parameters on the pull-out capacity of tapered suction caissons are studied. Soil cohesion is noticed to have a linear improving effect on the capacity of both upright and ta- pered suction caissons. The soil internal friction angle is noticed to have an exponential increasing effect on the pull-out capacity. With a constant caisson diameter, an increase in the aspect ratio is seen to particularly influence the pull-out capacity. With a constant caisson length, an increase in the aspect ratio is discovered to result in non-linear decrease in the pull-out capacity. Under undrained conditions, tapered models generally show less sensitivity to above mentioned soil/caisson parameters as compared with those under drained conditions. 展开更多
关键词 suction caisson pull-out capacity numerical study upright caisson tapered caisson offshore structure sand clay drained UNDRAINED
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Response of Skirted Suction Caissons to Monotonic Lateral Loading in Saturated Medium Sand 被引量:17
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作者 李大勇 张雨坤 +1 位作者 冯凌云 郭彦雪 《China Ocean Engineering》 SCIE EI CSCD 2014年第4期569-578,共10页
Monotonic lateral load model tests were carried out on steel skirted suction caissons embedded in the saturated medium sand to study the bearing capacity. A three-dimensional continuum finite element model was develop... Monotonic lateral load model tests were carried out on steel skirted suction caissons embedded in the saturated medium sand to study the bearing capacity. A three-dimensional continuum finite element model was developed with Z_SOIL software. The numerical model was calibrated against experimental results. Soil deformation and earth pressures on skirted caissons were investigated by using the finite element model to extend the model tests. It shows that the "skirted" structure can significantly increase the lateral capacity and limit the deflection, especially suitable for offshore wind turbines, compared with regular suction caissons without the "skirted" at the same load level. In addition, appropriate determination of rotation centers plays a crucial role in calculating the lateral capacity by using the analytical method. It was also found that the rotation center is related to dimensions of skirted suction caissons and loading process, i.e. the rotation center moves upwards with the increase of the "skirted" width and length; moreover, the rotation center moves downwards with the increase of loading and keeps constant when all the sand along the caisson's wall yields. It is so complex that we cannot simply determine its position like the regular suction caisson commonly with a specified position to the length ratio of the caisson. 展开更多
关键词 skirted suction caissons bearing capacity model tests monotonic lateral loading numerical modeling
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Reliability Index of Caisson Breakwaters for Load Variables Correlated 被引量:9
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作者 郄禄文 李炎保 《海洋工程:英文版》 EI 2004年第4期577-584,共8页
In order to suit the condition that the wave uplift is correlated with the horizontal wave load acting on a vertical breakwater, a generally used method for determining the reliability index β of the breakwater, i.e.... In order to suit the condition that the wave uplift is correlated with the horizontal wave load acting on a vertical breakwater, a generally used method for determining the reliability index β of the breakwater, i.e. the Hasofer-Lind method, is extended in a generalized stochastic space for correlative variables. The computational results for a caisson breakwater indicate that the value of β for the case of correlated variables is obviously smaller than that for the case of independent variables. 展开更多
关键词 caisson breakwater RELIABILITY correlated variables
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Numerical Simulation of Wave Interaction with Perforated Caisson Breakwaters 被引量:8
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作者 陈雪峰 李玉成 +2 位作者 王永学 董国海 白雪 《海洋工程:英文版》 2003年第1期33-44,共12页
The volume of fluid (VOF) method is presented to determine the reflection coefficient of and the total horizontal wave force on perforated caisson breakwaters. The present numerical model is compared with a linear ana... The volume of fluid (VOF) method is presented to determine the reflection coefficient of and the total horizontal wave force on perforated caisson breakwaters. The present numerical model is compared with a linear analytic solution obtained by Sahoo et al. (2000). Also this model is verified with the authors′ laboratory data. It is found that the numerical model is in good agreement with the regression equations obtained from the experimental data. The present numerical method is further discussed to relate porosity, the relative wave absorbing chamber depth, the reflection coefficient of perforated caissons and the total horizontal force on them. 展开更多
关键词 perforated caisson reflection coefficient wave force VOF method
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Numerical Simulation on Oscillation-Sliding-Uplift Rock Coupled Motion of Caisson Breakwater Under Wave Excitation 被引量:6
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作者 王元战 龚薇 迟丽华 《China Ocean Engineering》 SCIE EI 2010年第2期207-218,共12页
Corresponding to the sliding and the overturning failure,the elementary motion modes of caisson breakwater include the horizontal-rotational oscillation coupled motion,the horizontal sliding-rotational oscillation cou... Corresponding to the sliding and the overturning failure,the elementary motion modes of caisson breakwater include the horizontal-rotational oscillation coupled motion,the horizontal sliding-rotational oscillation coupled motion,the horizontal vibrating-uplift rocking coupled motion,and the horizontal sliding-uplift rocking coupled motion.The motion mode of a caisson will transform from one to another depending on the wave forces and the motion behaviors of the caisson.The numerical models of four motion modes of caisson are developed,and the numerical simulation procedure for joint motion process of various modes of caisson breakwater under wave excitation is presented and tested by a physical model experiment.It is concluded that the simulation procedure is reliable and can be applied to the dynamic stability analysis of caisson breakwaters. 展开更多
关键词 caisson breakwater four motion modes joint motion process numerical simulation
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Experimental and Theoretical Investigation of Wave Forces on APartially-Perforated Caisson Breakwater with A Rock-Filled Core 被引量:6
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作者 刘勇 李玉成 +1 位作者 滕斌 姜俊杰 《China Ocean Engineering》 SCIE EI 2006年第2期179-198,共20页
The total horizontal and vertical forces acting on a partially-perforated caisson breakwater and their phase difference are investigated in this study. The perforated breakwater sits on the rubble tilled foundation, a... The total horizontal and vertical forces acting on a partially-perforated caisson breakwater and their phase difference are investigated in this study. The perforated breakwater sits on the rubble tilled foundation, and has a rock-filled core. An analytical solution is developed based on the eigenfunction expansion and matching method to solve the wave field around the breakwater. The finite element method is used for simulating the wave-induced tlow in the rabble-filled foundation. Experiments are also conducted to study the wave forces on the perforated caissons. Numerical predictions of the present model are compared with experimental resuhs. The phase differences between the total horizontal and vertical forces are particularly analyzed by means of experimental and numerical results. The major factors that affect the wave forces are examined. 展开更多
关键词 partially-perforated caisson rock-fill core horizontal force vertical force phase difference
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Experimental Studies on Modified Suction Caissons in Fine Sand Subject to Uplift Loading 被引量:5
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作者 Hanbo Zhai Dayong Li 《Transactions of Tianjin University》 EI CAS 2017年第6期562-569,共8页
A modified suction caisson (MSC), which was reported by the authors of this paper previously, comprises an external short-skirted structure that is added to a regular suction caisson (RSC). It has been proved that MSC... A modified suction caisson (MSC), which was reported by the authors of this paper previously, comprises an external short-skirted structure that is added to a regular suction caisson (RSC). It has been proved that MSCs can improve the lateral bearing capacity and limit the deflection of the caisson compared with RSCs. A series of model tests were conducted to investigate responses of MSCs subject to uplift loading in saturated sand. The effects of external skirt dimensions on the uplift bearing capacity of MSCs were considered. In addition, the influences of the sealed top lid of the skirted structure on the uplift bearing capacity and the resulting passive suction of MSCs were also studied. It was found that the uplift bearing capacities of MSCs are 1.4–1.7 times that of RSCs. Moreover, test results in serviceable conditions show that the sealed external skirted structure of perspex-made suction caissons significantly contributed to the uplift bearing capacity as a result of passive suction. © 2017 Tianjin University and Springer-Verlag GmbH Germany 展开更多
关键词 Bearing capacity caissonS FLOWCHARTING FOUNDATIONS Offshore wind turbines Pressure vessels Wind turbines
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Experimental study of reflection coefficient and wave forces acting on perforated caisson 被引量:4
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作者 Chen Xuefeng(陈雪峰) +5 位作者 Li Yucheng(李玉成) Sun Dapeng(孙大鹏) Chen Renyou(陈仁友) 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2002年第3期451-460,共10页
The reflection coefficient and the total horizontal forces of regular waves acting on theperforated caisson are experimentally investigated. The empirical relationship between reflection coefficient and the ratio of t... The reflection coefficient and the total horizontal forces of regular waves acting on theperforated caisson are experimentally investigated. The empirical relationship between reflection coefficient and the ratio of the total horizontal forces acting on the perforated caisson to those on solid vertical walls with the relative chamber width, relative water depth and porosity of perforated wall, etc. are given. Moreover, the results of the ratio of the total horizontal forces are also compared with formulas given by Chinese Harbour Design Criteria and Takahashi, which may be useful for the practical engineering application. 展开更多
关键词 Perforated caisson reflection coefficient wave forces
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Lateral Bearing Capacity of Modified Suction Caissons Determined by Using the Limit Equilibrium Method 被引量:6
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作者 LI Da-yong MA Shi-li +1 位作者 ZHANG Yu-kun CHEN Fu-quan 《China Ocean Engineering》 SCIE EI CSCD 2018年第4期461-466,共6页
The modified suction caisson(MSC) adds a short-skirted structure around the regular suction caissons to increase the lateral bearing capacity and limit the deflection. The MSC is suitable for acting as the offshore wi... The modified suction caisson(MSC) adds a short-skirted structure around the regular suction caissons to increase the lateral bearing capacity and limit the deflection. The MSC is suitable for acting as the offshore wind turbine foundation subjected to larger lateral loads compared with the imposed vertical loads. Determination of the lateral bearing capacity is a key issue for the MSC design. The formula estimating the lateral bearing capacity of the MSC was proposed in terms of the limit equilibrium method and was verified by the test results. Parametric studies on the lateral bearing capacity were also carried out. It was found that the lateral bearing capacity of the MSC increases with the increasing length and radius of the external skirt, and the lateral bearing capacity increases linearly with the increasing coefficient of subgrade reaction. The maximum lateral bearing capacity of the MSC is attained when the ratio of the radii of the internal compartment to the external skirt equals 0.82 and the ratio of the lengths of the external skirt to the internal compartment equals 0.48, provided that the steel usage of the MSC is kept constant. 展开更多
关键词 modified suction caissons(MSCs) lateral bearing capacity limit equilibrium method parametric studies
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Seismic response of bridge pier on rigid caisson foundation in soil stratum 被引量:5
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作者 C. Tsigginos N. Gerolymos +1 位作者 D. Assimaki G. Gazetas 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2008年第1期33-43,共11页
An analytical method to study the seismic response of a bridge pier supported on a rigid caisson foundation embedded in a deep soil stratum underlain by a homogeneous half space is developed. The method reproduces the... An analytical method to study the seismic response of a bridge pier supported on a rigid caisson foundation embedded in a deep soil stratum underlain by a homogeneous half space is developed. The method reproduces the kinematic and inertial responses, using translational and rotational distributed Winkler springs and dashpots to simulate the soil-caisson interaction. Closed-form solutions are given in the frequency domain for vertical harmonic S-wave excitation. Comparison with results from finite element (FE) analysis and other available solutions demonstrates the reliability of the model. Results from parametric studies are given for the kinematic and inertial responses. The modification of the fundamental period and damping ratio of the bridge due to soil-structure interaction is graphically illustrated. 展开更多
关键词 caisson embedded foundations kinematic response inertial response Winkler model effective period effective damping
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A Probabilistic Method for Motion Analysis of Caisson Breakwaters 被引量:4
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作者 王元战 朱志伟 董少伟 《China Ocean Engineering》 SCIE EI 2006年第1期73-84,共12页
It is assumed that, during the design period, the waves acting on breakwaters are divided into three types: standing wave, broken wave and breaking wave,and the wave heights fit the Rayleigh distribution while the wa... It is assumed that, during the design period, the waves acting on breakwaters are divided into three types: standing wave, broken wave and breaking wave,and the wave heights fit the Rayleigh distribution while the water depths, wave periods and duration of breaking wave impact force fit normal distribution. Based on the random samples of water depths, wave heights, wave periods and duration of breaking wave impact force, the types of waves acting on breakwaters are distinguished and the time-history model of the wave force is determined. The motions of caisson breakwaters under the wave force are simulated by a dynamic numerical model and the statistic characteristics of the dynamic responses are analyzed with the Monte Carlo method. A probabilistic procedure to analyze the motion of the breakwater is developed therein. The procedure is illustrated by an example. 展开更多
关键词 caisson breakwater motion analysis probabilistic method Monte Carlo simulation
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H-M Bearing Capacity of A Modified Suction Caisson Determined by Using Load-/Displacement-Controlled Methods 被引量:11
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作者 张雨坤 高玉峰 +1 位作者 李大勇 Ali H.Mahfouz 《China Ocean Engineering》 SCIE EI CSCD 2016年第6期926-941,共16页
This paper presents a series of monotonically combined lateral loading tests to investigate the bearing capacity of the MSCs (modified suction caissons) in the saturated marine fine sand. The lateral loads were appl... This paper presents a series of monotonically combined lateral loading tests to investigate the bearing capacity of the MSCs (modified suction caissons) in the saturated marine fine sand. The lateral loads were applied under load- and displacement-controlled methods at the loading eccentricity ratios of 1.5, 2.0 and 2.5. Results show that, in the displacement-controlled test, the deflection-softening behavior of load-deflection curves for MSCs was observed, and the softening degree of the load-deflection response increased with the increasing external skirt length or the decreasing loading eccentricity. It was also found that the rotation center of the MSC at failure determined by the load-controlled method is slightly lower than that by the displacement-controlled method. The calculated MSC capacity based on the rotation center position in serviceability limit state is relatively conservative, compared with the calculated capacity based on the rotation center position in the ultimate limit state. In the limit state, the passive earth pressures opposite the loading direction under load- and displacement-controlled methods decrease by 46% and 74% corresponding to peak values, respectively; however, the passive earth pressures in the loading direction at failure only decrease by approximately 3% and 7%, compared with their peak values. 展开更多
关键词 MSC (modified suction caisson saturated marine fine sand model tests load- and displacement-controlled loading laterally combined bearing capacity earth pressure
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Earth Pressure Distribution and Sand Deformation Around Modified Suction Caissons(MSCs) Under Monotonic Lateral Loading 被引量:2
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作者 LI Da-yong LI Shan-shan +1 位作者 ZHANG Yu-kun CHEN Fu-quan 《China Ocean Engineering》 SCIE EI CSCD 2019年第2期198-206,共9页
The modified suction caisson(MSC) is a novel type of foundation for ocean engineering, consisting of a short external closed-top cylinder-shaped structure surrounding the upper part of the regular suction caisson(RSC)... The modified suction caisson(MSC) is a novel type of foundation for ocean engineering, consisting of a short external closed-top cylinder-shaped structure surrounding the upper part of the regular suction caisson(RSC). The MSC can provide larger lateral bearing capacity and limit the deflection compared with the RSC. Therefore, the MSC can be much more appropriate to use as an offshore wind turbine foundation. Model tests on the MSC in saturated sand subjected to monotonic lateral loading were carried out to investigate the effects of external structure sizes on the sand surface deformation and the earth pressure distribution along the embedded depth. Test results show that the deformation range of the sand surface increases with the increasing width and length of the external structure. The magnitude of sand upheaval around the MSC is smaller than that of the RSC and the sand upheaval value around the MSC in the loading direction decreases with the increasing external structure dimensions. The net earth pressure in the loading direction acting on the internal compartment of the MSC is smaller than that of the RSC at the same embedded depth. The maximum net earth pressure acting on the external structure outer wall in the loading direction is larger than that of the internal compartment, indicating that a considerable amount of the lateral load and moment is resisted by the external skirt structure. 展开更多
关键词 MSC (modified SUCTION caisson) RSC (regular SUCTION caisson) model tests MONOTONIC lateral loading DEFORMATION of SAND surface earth pressure distribution
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Analysis of Oblique Wave Interaction with a Comb-Type Caisson Breakwater 被引量:3
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作者 WANG Xinyu LIU Yong LIANG Bingchen 《Journal of Ocean University of China》 SCIE CAS CSCD 2018年第2期281-290,共10页
This study develops an analytical solution for oblique wave interaction with a comb-type caisson breakwater based on linear potential theory. The fluid domain is divided into inner and outer regions according to the g... This study develops an analytical solution for oblique wave interaction with a comb-type caisson breakwater based on linear potential theory. The fluid domain is divided into inner and outer regions according to the geometrical shape of breakwater. By using periodic boundary condition and separation of variables, series solutions of velocity potentials in inner and outer regions are developed. Unknown expansion coefficients in series solutions are determined by matching velocity and pressure of continuous conditions on the interface between two regions. Then, hydrodynamic quantities involving reflection coefficients and wave forces acting on breakwater are estimated. Analytical solution is validated by a multi-domain boundary element method solution for the present problem. Diffusion reflection due to periodic variations in breakwater shape and corresponding surface elevations around the breakwater are analyzed. Numerical examples are also presented to examine effects of caisson parameters on total wave forces acting on caissons and total wave forces acting on side plates. Compared with a traditional vertical wall breakwater, the wave force acting on a suitably designed comb-type caisson breakwater can be significantly reduced. This study can give a better understanding of the hydrodynamic performance of comb-type caisson breakwaters. 展开更多
关键词 Comb-type caisson BREAKWATER PERIODIC BOUNDARY conditions matched EIGENFUNCTION EXPANSIONS analytical solution wave force
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