摘要
抗冲击性是现代舰用柴油机的设计指标之一,仿真分析是柴油机抗冲击研究的重要手段。将各种波形的加速度时域输入载荷转化为冲击谱,发现脉宽为10 m s的三角波加速度峰值与冲击谱等加速度线的值相同,建议将该波形作为设备抗冲击对比分析的标准输入载荷。基于ABAQUS6.7软件,建立包含柴油机主干部件的整机多柔体抗冲击分析模型,分别实现了某V6型柴油机在额定工况和停机工况下受冲击的仿真计算。仿真结果表明,柴油机冲击响应特性是非线性的,额定工况下受冲击时应力响应值并非是停机情况下受冲击的应力响应值和额定工况下工作应力的简单叠加。柴油机曲轴、机体、飞轮壳和机脚的冲击强度都需要通过仿真进行校核。
Various shock waves in time domain were translated into shock response spectrums(SRS).It was found that the peak acceleration value of 10ms triangular shock wave is equal to the acceleration value on the isoline of SRS.Accordingly,10ms triangular shock wave was suggested as the standard input load for anti-shock performance analysis of equipment.By virtue of the software of ABAQUS6.7,the flexible multi-body and anti-shock analysis model of the whole engine,including the backbone,was established.The shock si...
出处
《振动与冲击》
EI
CSCD
北大核心
2009年第11期87-90,129+205,共6页
Journal of Vibration and Shock
