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楔形物体在静水与波浪中自由入水砰击试验研究 被引量:7
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作者 邹丽 李振浩 +2 位作者 孙铁志 马伟佳 裴玉国 《海洋工程》 CSCD 北大核心 2019年第1期1-11,共11页
通过自由落体的入水方式,分别在静水和规则波中开展了两种不同横剖面的曲面楔形体入水砰击问题试验研究。使用高速摄像系统记录楔形体入水过程流场演变和运动特性,采用加速度传感器和压力传感器进行数据的动态采集。试验结果表明,在静... 通过自由落体的入水方式,分别在静水和规则波中开展了两种不同横剖面的曲面楔形体入水砰击问题试验研究。使用高速摄像系统记录楔形体入水过程流场演变和运动特性,采用加速度传感器和压力传感器进行数据的动态采集。试验结果表明,在静水中入水时,外凸剖面楔形体入水砰击后模型两侧的射流飞溅比反曲剖面更剧烈,而在楔形体前端的水面以下部分形成的气腔更小;在规则波中入水时,对于相同模型,在波峰和上跨零点相位下模型入水砰击后两侧的射流飞溅比在波谷相位更剧烈。相同工况时,反曲剖面模型所受砰击的加速度峰值和压力峰值更小;在相同的入水速度下,对于相同模型,波浪载荷和砰击载荷的共同作用会使模型所受砰击压力显著增大。 展开更多
关键词 规则波 面楔形体 波浪入水 砰击 外凸剖面 反曲剖面 流固耦合
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Estimation of Deep Soil Profiles in Lima Peru
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作者 Diana Calderon Fernando Lazares +2 位作者 Zenon Aguilar Toru Sekiguchi Shoichi Nakai 《Journal of Civil Engineering and Architecture》 2011年第7期618-627,共10页
Deep shear-wave velocity profiles at eight places in Lima Peru were estimated based on the inversion of dispersion curves. The dispersion curves were calculated from small and large microtremor arrays using two method... Deep shear-wave velocity profiles at eight places in Lima Peru were estimated based on the inversion of dispersion curves. The dispersion curves were calculated from small and large microtremor arrays using two methods: the F-k proposed by Capon (1969) and the CCA proposed by Cho et al. (2004). For the purpose of large array measurement we introduced a new type of sensor. Important results are the relative shallow depths to the basement rock in the area classified as alluvial gravel that covers most of the area of Lima city; and the relative large depth to the bedrock in places identified as VSV and CMA. It is recommended that this study be complemented with PS loggings in order to verify the estimated profiles. 展开更多
关键词 Microtremor array dispersion curve INVERSION soil profile H/V spectrum.
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