Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)最新文献

RECOVERY OF SURFACE WAVES FROM BOTTOM PRESSURE BY NEURAL NETWORK WITH BISPECTRUM 用双谱神经网络从底压中恢复表面波

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Pub Date : 2023-09-01 DOI: 10.2208/kaigan.77.2_i_55

Hiyori Yoshino, N. Hashimoto, Yoshihiko Ide, K. Kawaguchi, Masao Mitsui

{"title":"RECOVERY OF SURFACE WAVES FROM BOTTOM PRESSURE BY NEURAL NETWORK WITH BISPECTRUM","authors":"Hiyori Yoshino, N. Hashimoto, Yoshihiko Ide, K. Kawaguchi, Masao Mitsui","doi":"10.2208/kaigan.77.2_i_55","DOIUrl":"https://doi.org/10.2208/kaigan.77.2_i_55","url":null,"abstract":"The Nationwide Ocean Wave Information Network for Ports and Harbors (NOWPHAS) conducted by the Port and Harbor Bureau of the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) in Japan, uses a Doppler Wave Meter (DWM) as a standard equipment for wave observation. Depending on the situation, the system supplements the missing data by estimating surface waves based on water pressure data as appropriate. Meanwhile, in the case of cargo handling in harbors, the significant wave height is generally used as a criterion. It has been reported that even under conditions where wave heights are considered calm, there are many cases where large ship motions occur, causing problems with cargo handling operations. Since large ship motions occur when the long-period wave component is close to characteristic period of the vibration system consisting of the hull and mooring cables, it is necessary to examine the frequency domain based on spectra instead of the significant wave height. Therefore, in this study, the frequency-domain analysis was used as the basis for the estimation of surface waves from bottom pressure waves. The transfer function that relates the two wave quantities is estimated to convert the pressure wave to a water surface wave. The purpose of this study is to develop a method for estimating surface waves that can be used not only during storms, but also for examining the marginal loading wave conditions for long period waves at all times.","PeriodicalId":417255,"journal":{"name":"Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124005461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

TSUNAMI RUN-UP CONSIDERING TIME VARIATION OF DENSITY OF INUNDATION WATER 考虑淹没水密度时间变化的海啸上升

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Pub Date : 2023-09-01 DOI: 10.2208/kaigan.78.2_i_247

H. Matsutomi, T. Arikawa

{"title":"TSUNAMI RUN-UP CONSIDERING TIME VARIATION OF DENSITY OF INUNDATION WATER","authors":"H. Matsutomi, T. Arikawa","doi":"10.2208/kaigan.78.2_i_247","DOIUrl":"https://doi.org/10.2208/kaigan.78.2_i_247","url":null,"abstract":"Aiming for the advancement of tsunami load, historical and/or prospective tsunami scale evaluations, practical empirical formulas for evaluating friction factor K of inundation flow and density ρ of inundation water over a movable bed, which can be applied to a tsunami run-up theory, are proposed using experimental data whose amount (range) is increased (expanded) by carrying out additional experiments on ρ and run-up of inundation flow with sediment, and verification data of the above theory under a uniformly sloping movable bed condition are provided. Series solutions with a higher universality to the run-up of tsunami inundation flow with sediment over a uniformly sloping movable bed, in which both K and ρ depend on time, are derived under the conditions depending on an incident bore height h1 at shoreline (or an initial stored water depth), bed slope i, median particle diameter d50 of initial bed material, and examples of the solutions are shown. The solutions are applicable to the case that ρ is independent on time, i.e., the case of inundation flow without sediment over a movable bed or fixed bed. Including the case of inundation flow without sediment, validity of one of the solutions is also verified through a comparison with the verification data on run-up distance.","PeriodicalId":417255,"journal":{"name":"Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114528907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PREDICTION OF TOPOGRAPHIC CHANGES ON ENSYUNADA COAST CONSIDERING EFFECT OF BOTH WAVES AND WINDBLOWN SAND 考虑海浪和风沙影响的恩休纳达海岸地形变化预测

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Pub Date : 2023-09-01 DOI: 10.2208/kaigan.76.2_i_469

T. Yokota, T. Uda, A. Kobayashi, Yukiyoshi Hoshigami, A. Katsuki, Yasuhito Noshi

引用次数: 0

STUDY ON AUTOMATIC CLASSIFICATION OF GRAVEL BEACH SEDIMENTS USING MACHINE LEARNING 基于机器学习的砾石滩沉积物自动分类研究

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Pub Date : 2020-05-15 DOI: 10.2208/kaigan.77.2_i_673

Y. Inoue, Masami Kiku, Tomoaki Nakamura, N. Mizutani

引用次数: 0

TRANSPORT PROCESSES AROUND THE IZU-CHAIN ISLANDS INVESTIGATED WITH A LAGRANGIAN PARTICLE TRACKING MODEL 用拉格朗日粒子跟踪模型研究了伊豆链岛屿周围的输运过程

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Pub Date : 2019-03-14 DOI: 10.2208/kaigan.75.i_211

Waku Kimura, E. Masunaga, Taichi Kosako, Y. Uchiyama

引用次数: 0

EVALUATION FOR TEMPORAL VARIATION OF SEAWATER EXCHANGE RATIO IN AQUAFARM BASED ON STATE-OF-THE-ART AUTOMATIC OBSERVATION AND PARTICLE TRACKING MODEL 基于最先进自动观测和粒子跟踪模型的水产养殖场海水交换率时间变化评价

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Pub Date : 1900-01-01 DOI: 10.2208/kaigan.78.2_i_745

Satoshi Nakada, K. Kamio, Norikazu Masuda, Y. Nihei

引用次数: 0

THERMAL FLUID DIFFUSION AND ADVECTION PHENOMENA IN POROUS MEDIA BY BEACH OF IBUSUKI COAST ibusuki海岸海滩多孔介质中的热流体扩散和平流现象

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Pub Date : 1900-01-01 DOI: 10.2208/kaigan.75.i_31

Akio Nagayama, Y. Morimoto, Takatomo Miyake

引用次数: 0

ACCORDANCE OF COMPONENTWISE MAXIMA IN MULTIVARIATE SEA EXTREME EVENTS 多元海洋极端事件中分量极大值的一致性

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Pub Date : 1900-01-01 DOI: 10.2208/kaigan.77.2_i_73

Toshikazu Kitano

引用次数: 0

PREDICTION OF CURRENT AND TOPOGRAPHICAL CHANGE IN CONSIDERATION OF TEMPORAL VARIATION IN WAVES AND WINDS AT THE BAKKAI FISHING PORT 考虑波风时间变化的八开渔港海流和地形变化预测

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Pub Date : 1900-01-01 DOI: 10.2208/kaigan.75.i_517

Toru Yoshida, M. Itou, Shinichiro Tabata, Tsutomu Kawaguchi, T. Yamashita

引用次数: 0

MODEL EXPERIMENT AND NUMERICAL SIMULATION FOR WAVE OVERTOPPING AND INUNDATION ON QUAY DURING HIGH TIDE 涨潮时码头浪涌及淹没的模型试验与数值模拟

Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) Pub Date : 1900-01-01 DOI: 10.2208/kaigan.78.2_i_601

Y. Hamano, K. Hirayama, S. Yamada

引用次数: 0