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为了验证拱形桥梁拱形防撞装置船撞有限元结构计算中结构应变响应的准确性以及寻找计算中影响应变响应的因素,通过拱形防撞装置1:25比例模型摆锤碰撞试验以及有限元数值模拟进行对比验证分析.对拱形防撞装置1:25比例模型进行摆锤碰撞试验,采集试验中碰撞力和关键点的应变响应曲线,并对试验进行漂浮状态下无阻尼和有阻尼两种情况的数值模拟对比分析.分析发现无阻尼模型计算出的应变响应不论是响应趋势还是应变峰值点的大小都与试验相差较大.通过在有限元无阻尼模型中引入Rayleigh质量比例阻尼分析,试验采集到的应变峰值与有限元数值模拟分析出的应变峰值之间的误差约为8.7%,应变响应趋势也基本一致.因此,有阻尼计算模型可应用于实际结构的计算中,应变峰值误差也可作为实际结构应力计算结果评价的参考指标,并可将该误差作为工程安全系数的一部分来考虑.
In order to verify the accuracy of the structural strain response in the calculation of the finite element structure of the ship with the arched collision avoidance device of the arched bridge and to find out the factors that affect the strain response in the calculation, Meta-numerical simulation to verify the comparison and analysis.Analogical 1:25 model of the arch collision avoidance device for pendulum impact test to collect the test of the impact force and the key point of the strain response curve, and the test state of floating undamped and damped The results show that the strain response calculated by the undamped model has a great difference with the test whether it is the response trend or the peak value of the strain point.Through the introduction of Rayleigh mass damping analysis , And the error between the peak value of the strain collected by the experiment and that of the finite element simulation is about 8.7% and the trend of the strain response is also basically the same. Therefore, the damping calculation model can be applied to the calculation of the actual structure. The peak strain The error can also be used as a reference index for evaluating the actual structural stress calculation result, and can be used as an engineering safety Part numbers to consider.