Being an impressive representative of gravity installed anchors (GIAs), the OMNI-Max anchor has many attractive attributes and becomes more and more a conspicuous role in recent deepwater applications. However, the pullout capacity property of OMNI-Max anchors has not been well understood due to their three-dimensional structure and the loading way in variational seabed conditions. Full knowledge of the pullout capacity property is beneficial to understand not only the working performance but also the comprehensive kinematic behaviors of OMNI-Max anchors in the seabed. The present work aims to investigate the complicated pullout capacity property of OMNI-Max anchors in clay under multiple factors, including the anchor embedment depth, the anchor orientation, the bearing area, the loading angle, and the soil strength. Large deformation finite element analyses are performed using the coupled Eulerian-Lagrangian (CEL) technique. Numerous cases of multiple factors are designed and analyzed to acquire the effects of different influential parameters. An explicit expression of the end-bearing capacity factor of OMNI-Max anchors is finally formulated in terms of multiple factors, whose effectiveness and applicability are validated by orthogonal tests and available published data. This expression can be simply utilized to evaluate the pullout capacity of OMNI-Max anchors under complicated conditions.

OMNI-Max锚是重力安装锚（GIA）的令人印象深刻的代表，具有许多吸引人的属性，并且在最近的深水应用中变得越来越重要。然而，由于OMNI-Max锚的三维结构和在变化的海底条件下的加载方式，其抗拉能力特性尚未得到很好的理解。充分了解拉拔能力特性不仅有助于了解工作性能，而且有助于了解OMNI-Max锚在海床中的综合运动特性。本工作旨在研究O​​MNI-Max锚在黏土下的复杂的抗拔能力特性，这些因素包括锚的埋深，锚的方向，承载面积，荷载角和土壤强度。使用耦合欧拉-拉格朗日（CEL）技术进行大变形有限元分析。设计并分析了多种因素的众多案例，以获取不同影响参数的影响。最终，通过多个因素来表达OMNI-Max锚的端部承载力因数的明确表述，其有效性和适用性已通过正交试验和可用的公开数据进行了验证。该表达式可以简单地用于评估复杂条件下OMNI-Max锚的拔出能力。最终，通过多个因素来表达OMNI-Max锚的端部承载力因数的明确表述，其有效性和适用性已通过正交试验和可用的公开数据进行了验证。该表达式可以简单地用于评估复杂条件下OMNI-Max锚的拔出能力。最终，通过多个因素来表达OMNI-Max锚的端部承载力因数的明确表述，其有效性和适用性已通过正交试验和可用的公开数据进行了验证。该表达式可以简单地用于评估复杂条件下OMNI-Max锚的拔出能力。