| 摘要: |
| 海洋环境中风荷载是船、采油平台、海上结构等所受主要荷载之一。自然界中的风不均匀且具有较强的脉动性。因此，研究随机脉动风场具有实际意义。采用伺服驱动有效控制风机的响应时间，基于脉动风谱特性进行了随机脉动风的模拟试验，并与同类试验相比，谱形波动较小，因此具有更好的稳定性。同时还研究了各种不同控制因子对谱模拟的影响，给出了稳定脉动风场所需信号时间间隔、试验时长等参数的选取区间。 |
| 关键词: 脉动风 风谱 简谐波叠加法 物理模拟 |
| DOI： |
| 分类号:U65 |
| 基金项目:国家自然科学基金资助项目（51579156）；水利部公益性行业科研专项经费资助项目（201401004）；南京水利科学研究院院基金重大项目（Y214009） |
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| API simulation spectrum in ocean engineering based on physical model tests |
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DU Qi-lu, HUANG Hai-long, ZHOU Yi-ren, ZUO Qi-hua
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Nanjing Hydraulic Research Institute, Nanjing
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| Abstract: |
| In marine engineering environment, the wind is one of the main loads. At present, the physical model tests for the ocean engineering usually adopt the uniform wind to simulate equivalent wind load. But the natural wind is uneven and has a strong random pulsation. Under the condition of uniform and uneven wind, the vessel load has large difference between them. Before studying the force and motion of ship in the randomly fluctuating wind field, it is necessary to establish a random wind test environment. Thus, grasping the law of simulating the wind field is the first step and has more practical meaning. In this study, a programmable servo driver is used for controlling the response time of the wind machine. Based on the features of the random wind spectrum, some physical wind model tests have been carried out in the laboratory. Compared with other model tests, the results of the present experiment show better. Meanwhile, studies of the different effects of the main control factors of spectrum simulation have been done to provide the necessary data for determining suitable parameters in the tests, such as signal interval time and testing time, and to further offer random wind experiment environment for researches of dynamic water transport engineering. |
| Key words: fluctuating wind wind spectrum harmony superposition physical simulation |
