现在,有许多海洋平台在从事海上油气田的勘探和开发,其中自升式移动平台扮演着重要的角色。我国目前有自升式移动平台30座,这些平台大多经历了较长的服役期,有些平台的结构已发生了一些变化。如何保证这些平台的安全,最大限度地发挥其结构潜能是工程界和理论界迫切需要解决的问题。 一、评估数据库 老龄平台可能与原来设计保持不变,也可能略有改动或已遭破坏,破坏的形式也是多种多样的,如由事故造成的凹陷和裂缝、自然老化造成的腐蚀、疲劳作用或超载造成的应力破损等等。因此,建立高质量的评估数据库对结构评估非常重要,并可通过评估来论证预定用途、使用寿命、所需要 Currently, many offshore platforms are engaged in the exploration and development of offshore oil and gas fields, of which jack-up mobile platforms play an important role. At present, there are 30 jack-up mobile platforms in our country, and most of these platforms have experienced a long service period. Some platforms have undergone some structural changes. How to ensure the safety of these platforms and maximize their structural potential is an urgent problem to be solved by engineering and theorists. 1. Evaluation Database The aging platform may remain unchanged from the original design, may also be slightly altered or destroyed, and the forms of damage may also be varied. For example, potholes and cracks caused by accidents, corrosion and fatigue caused by natural aging Or overload caused by stress damage and so on. Therefore, the establishment of high-quality evaluation of the database is very important for structural evaluation, and assessment can be used to demonstrate the intended use, service life, required