| 弹性支承条件下水平板波浪冲击作用试验加速度响应频率分析 |
| Frequency Analysis of Acceleration Responsein Wave Impact Experiment of Water Plate Under Elastic Support Conditions |
| 投稿时间：2025-03-31 修订日期：2025-09-16 |
| DOI： |
| 中文关键词: 透空式水平板，弹性支承，加速度响应，主振频率特征数，固有频率特征数 |
| 英文关键词:a horizontal plate of an open wharf, elastic support, acceleration response, characteristic number of main vibration frequency, characteristic number of natural frequency. |
| 基金项目: |
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| 中文摘要: |
| 试验研究以透空式海洋平台等为代表的建构筑物遭受波浪冲击为背景,通过物理模型试验对弹性支承条件下透空式水平板的加速度进行了高频采集,并且对采集得到的加速度历时曲线进行了FFT变换,得到了与结构物固有频率相对应的频率特性。通过对水平方向加速度进行FTT频谱分析,表明结构物振动主频率为接近结构物水平方向固有频率的倍频处,远离此倍频的能量迅速减小；竖直方向加速度FTT频谱分析,表明结构物固有频率处,振动能量分布最为密集。附加质量的存在会影响结构物主振频率,表现在不同净空条件下,振动能量密集处的频率值上的差异性。为方便确定不同工况下,结构物在波浪作用下的主振频率,探究了波浪作用下主振频率特征数λ=fmax/fT与固有频率特征数μ=fg/fT之间和相对净空(s/H)之间的关系。 |
| 英文摘要: |
| Experimental research was conducted on buildings such as transparent ocean platforms that were subjected to wave impacts. Through physical model experiments, high-frequency acceleration data of transparent horizontal plates under elastic support conditions were collected, and the collected acceleration duration curves were FFT transformed to obtain frequency characteristics corresponding to the natural frequency of the structure. Through FTT spectrum analysis of horizontal acceleration, it is shown that the main frequency of structural vibration is close to the harmonic of the natural frequency of the structure in the horizontal direction, and the energy far away from this harmonic decreases rapidly; The FTT spectrum analysis of vertical acceleration indicates that the vibration energy distribution is most dense at the natural frequency of the structure. The presence of additional mass will affect the main frequency of the structure, manifested in the differences in frequency values at vibration energy intensive locations under different clearance conditions. In order to facilitate the determination of the principal vibration frequency of structures under wave action under different working conditions, the relationship between the characteristic number of principal vibration frequency λ=fmax/fT and the characteristic number of natural frequency μ=fg/fT under wave action, as well as the relative clearance (s/H), was explored. |
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