Guyed Ocean Towers Under Seismic and Other Stochastic Loads

地震和其他随机载荷下的拉线海洋塔

• 批准号: 8611819
• 负责人: John Leonard
• 金额: $ 3万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1986
• 资助国家: 美国
• 起止时间: 1986-06-01 至 1987-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8611819&HistoricalAwards=false
• 关键词: Guyed; Ocean; Towers; Under; Seismic

An exploratory study is conducted to develop an analytical model for the nonlinear guy cables which anchor the bottom of an ocean tower to maintain its lateral stability. Each guy line consists of a lead line, a trailing line, and a clump weight to limit the tension in the cable. For normal sea condition a relatively stiff system is required. However, in survival sea states it is desired to allow the system to become more compliant. This is achieved by making the clump weight leave the resting position on the sea floor, thus making the system more flexible and decreasing the dynamic amplificaton factor. The effort will be focused on the development of a stochastic linearization technique in the frquency domain for a systems involving coupled nonlinearities in stiffness and damping, and on the development of a more accurate and efficient model of slack guylines to simulate the dynamic contact of the guyline and clump weight with the ocean bottom.

进行了探索性研究，以建立一个分析模型， 锚在海洋塔底部的非线性拉索 保持其横向稳定性。 每条牵索由一条引线组成， 一根拖绳和一个配重块来限制缆绳的张力。 对于正常海况，需要相对刚性的系统。 然而，在生存海况下，期望允许系统 变得更加顺从。 这是通过使块权重 离开海底的休息位置，从而使系统 更灵活，降低了动态放大系数。 的 努力将集中在随机线性化的发展 耦合系统的频域技术 刚度和阻尼的非线性，以及 更准确和有效的模型松弛绷绳模拟 绷绳和配重块与海底的动态接触。