【作者】 徐昶；

【导师】 钟瑚穗；

【作者基本信息】 河海大学 ， 港口海岸及近海工程， 2004， 硕士

【摘要】 根据我国规范规定，斜坡式防波堤的堤心石应采用10～100kg块石。如果堤心石的重量范围可以扩大到1～800kg，将在工程项目建设中取得显著的经济效益。本文的选题正是来源于这一工程背景。 本文对施工现场采用的10～100kg和1～800kg重量范围的堤心石进行了随机抽样和重量级配分析，得到了描述这两种堤心石类别的重量级配曲线、中值重量、不均匀系数等物理特性指标，并由此制备重量级配相似的模型样本。通过波浪模型试验量测了模型样本的堤前反射系数、堤心内的压强大小及其分布、堤后的透射波高。 通过试验，研究和分析堤心石重量级配变化对防波堤物理与动力特性的影响及其变化规律。 1、比较各样本之间的物理特性指标； 2、比较各样本之间的堤前反射系数； 3、实测各样本堤心内的压强值，研究其分布情况和变化规律 4、将实测压强分解为静压和动压，得出不同样本间静压和动压的大小关系。 5、堤心内沿波浪传播方向变化的动压遵循e指数衰减规律。 6、得出各个样本的阻尼系数，并用其反映波能在堤心内传播所受的阻力。 7、比较各样本之间的堤后透射波高。 本文比较全面的研究了以往未被重视的堤心石的一些物理特性及动力特性。这些研究内容和成果有助于我们更深入和透彻的掌握防波堤在波浪作用下的工作状态，在工程实践和学术意义都上具有重要的意义和价值。更多还原

【Abstract】 According to our national norm, the weight of the core of rubble mound breakwater should be 10kg~ 100kg. If the weight scope of it can extend to be 1 kg ~ 800 kg, and puts it into the engineering practise, there will be remarkable economic results. This dissertation’s problem just comes from this engineering background exactly.For this two kinds of cores, which were taken from the engineering place, this dissertation draws sample by computer and analyses the weight distributions, getting the weight curves, the middle weights, asymmetry coefficients and other physics characteristic indexes of them, and makes up the model samples which are similar to the factual weight distributions. By means of wave model experiments, measure the wave’s reflection coefficients in front of breakwater, the pressure sizes and distributions inside of breakwater, and the wave weights behind breakwater.By means of experiments, this dissertation studies the change law and influence of breakwater’s physics and dynamic characteristics, which are caused by the changes of the stone’s weight distribution.1. Compare the physics characteristic indexes of each sample2. Compare the reflection coefficient of each sample in front of breakwater3. Measure the pressure size of each sample inside of breakwater, and study its distribution and change law4. Separate the measuring pressure into the static and dynamic pressure, get the relationship between the static and dynamic pressure5. The change of dynamic pressure in the orientation of wave spreading follows the damping of E-index6. Get the damping coefficient of each sample, and use it to reflect the resistance which wave energy suffers inside of breakwater7. Compare the wave height behind breakwater of each sampleThis dissertation studies the physics and dynamic characteristics of core completely, to which are not paid attention before, these contents and results are beneficial to that we can know the working state under the wave action more thoroughly. It has important significance and value in the field of study and engineering practise.更多还原