船用发动机消声器抗冲击性能测试

Impact resistance test of marine engine silencer

为优化发动机消声器抗冲击性提供性能数据,研究船用发动机消声器抗冲击性能测试方法。该方法以某船发动机复合型消声器为研究对象,通过Matlab软件和PreE建模软件建立船用发动机消声器三维模型。通过设计该复合型消声器冲击模拟荷载施加方案,利用船用发动机消声器三维模型模拟不同冲击荷载施加方案时的冲击效果,并通过动态设计分析方法得到消声器冲击荷载数值。实验结果表明:爆炸方向角越大、爆炸距离越近,则船用发动机消声器的总应力数值越高;越靠近冲击位置处的应力越高,且该位置处容易出现损坏;船用发动机消音器受冲击屈服数值与当前环境温度成正比例关系,在环境温度低于400℃之前时,其屈服数值均低于屈服极限值,抗冲击性良好。

In order to provide performance data for optimizing the impact resistance of engine muffler, the test method of impact resistance of marine engine muffler is studied. This method takes the composite muffler of a marine engine as the research object, and establishes the three-dimensional model of the marine engine muffler through Matlab software and pree modeling software. Then, by designing the impact simulation load application scheme of the composite muffler, the impact effect of different impact load application schemes is simulated by using the three-dimensional model of marine engine muffler, and the impact load value of the muffler is obtained by dynamic design and analysis method. The experimental results show that the larger the explosion direction angle and the closer the explosion distance, the higher the total stress value of the marine engine muffler. The closer to the impact position, the higher the stress is, and damage is easy to occur at this position. The impact yield value of marine engine silencer is in direct proportion to the current ambient temperature. When the ambient temperature is lower than 400 ℃, the yield value is lower than the yield limit value, and the impact resistance is good.