The purpose of this study is to analyze the relationship between the occurrence of intermediate peak and time duration, and to conduct a review for the causes of the intermediate peak. In this test, ice impact tests were conducted using a bow side shell frame and ice specimen. A total of 70 samples were manufactured. Two types of ice specimen with relatively different surface conditions were used. The criterion for dividing the two types of ice specimen was the different exposure times to room temperature after freezing. This experiment was conducted for each parameter in order to reproduce the actual icebreaking situation.

As a result of the analysis, the intermediate peak in the ice load signal have been found to be caused by mechanisms by which the inner surface of broken ice contact with hull immediately after the initial hitting point of ice has been broken.

本研究的目的是分析中间峰的发生与持续时间之间的关系，并对中间峰的原因进行回顾。在该测试中，使用船首侧壳框架和冰标本进行了冰冲击测试。总共生产了70个样品。使用了两种表面条件相对不同的冰标本。区分两种冰样的标准是冷冻后暴露于室温的时间不同。为了重现实际破冰情况，对每个参数进行了该实验。

分析的结果是，发现冰负荷信号中的中间峰值是由机制引起的，在这种机制下，碎冰的内表面在冰的初始撞击点被破坏后立即与船体接触。