Placement grid design is a key phase when constructing armor layers in mound breakwaters. Homogeneous Low-Crested Structures (HLCS) are low-crested structures designed as artificial reefs for marine colonization, coral reef regeneration and beach protection. The placement grid affects the construction feasibility, hydraulic stability and wave transmission of HLCS. This study presents a numerical methodology to simulate a realistic placement procedure for armor units during the construction of HLCS. This numerical simulator is based on the open-source physics engine Bullet Physics Engine (BPE), which applies Newton's laws of motion to rigid bodies. From an initial theorical placement grid for Cubipod HLCS, a series of numerical realistic unit placement tests are carried out to emulate the placement process at prototype scale; placement velocity and spatial deviation of crawler cranes are given parameters associated with each specific project. Considering the placement velocity and spatial deviation during construction, the quality of each specific placement grid is associated with the measured placement errors and the corresponding initial construction deviation to HLCS. This numerical methodology is valuable to understand the influence and the uncertaintly of the construction procedure of armor layers in mound breakwaters.

放置网格设计是在土堆防波堤上建造装甲层时的关键阶段。均质低顶结构 (HLCS) 是低顶结构，设计为人工鱼礁，用于海洋殖民、珊瑚礁再生和海滩保护。网格的布置影响着HLCS的施工可行性、水力稳定性和波浪传输。本研究提出了一种数值方法来模拟 HLCS 建造过程中装甲单元的实际放置程序。该数值模拟器基于开源物理引擎 Bullet 物理引擎 (BPE)，它将牛顿运动定律应用于刚体。从 Cubipod HLCS 的初始理论放置网格开始，进行了一系列数值现实单元放置测试，以模拟原型规模的放置过程；履带式起重机的放置速度和空间偏差是与每个具体项目相关的参数。考虑到施工过程中的放置速度和空间偏差，每个特定放置网格的质量与测量的放置误差和相应的 HLCS 初始施工偏差相关。这种数值方法对于理解土墩防波堤装甲层施工过程的影响和不确定性具有重要意义。