第四部分主要介绍了FBG在几个结构模型试验中的应用，包括对于冰荷载模型试验和软钢钢丝应变测量试验。

The fourth part is about the application of FBG in some structure model experiments, including the ice load model experiment and flexible pipes steel strain measurement experiment.

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该方法以测量的应变值为基础，由拟合的曲线方程计算接头载荷，并与试验时施加的总载荷对比。

In this method, based on the measured strain values, the joint load is calculated by the fitted curve equation and compared with the total load applied during test.

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试验结果验证了采用非接触式光电检测技术测量中应变率材料力学性能的可行性。

The feasibility of measuring the mechanical property of material in the mid strain rate condition with the non contact photoelectric detecting technology is verified by experimental results.

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