Novel support-and-repair ships could technically perform comprehensive maintenance and repair work for damaged marine structures on a deep sea. This paper analyses competition in the repair market for marine structures between the shipyard mode and the support-and-repair ship mode by using game theory. First, we present a game-theoretical model of competition analysis and pricing strategy based on the lowest expense and derive a closed form to calculate the optimal pricing strategy, market share and maximum profit by using partial differentiation with respect to prices. Furthermore, a second game-theoretical model of competition analysis and pricing strategy considering the choice preference of the repair decision maker is formulated. Based on the characteristics of this model, we use the discretization method to decompose it into a finite number of sub-models and design an iterative algorithm to efficiently address the sub-models. Finally, the calculation results prove the high value and attractive prospects for applying the support-and-repair ship mode in repairing marine structures at sea.

新型的维修船可以在技术上对深海受损的海洋结构进行全面的维护和修理工作。本文运用博弈论分析了造船厂模式与支持维修舰船模式在海洋结构维修市场中的竞争。首先，我们提出一种基于最低费用的竞争分析和定价策略的博弈模型，并得出封闭的形式，以通过使用价格的局部差异来计算最佳定价策略，市场份额和最大利润。此外，还建立了考虑维修决策者选择偏好的竞争分析和定价策略的第二种博弈模型。根据该模型的特点，我们使用离散化方法将其分解为有限数量的子模型，并设计一种迭代算法来有效地处理子模型。最后，计算结果证明了将支持维修舰船模式应用于海上海洋结构的修复具有很高的价值和诱人的前景。