论文部分内容阅读
建立了9艘代表性轮船的精细有限元计算模型,通过与刚性墙面的碰撞模拟计算,获得了不同吨位和不同撞击速度下共81条船撞力时间过程样本。为考虑船舶撞击力时间过程的随机性,对撞击力的持续时间和撞击力幅值进行了无量纲化处理,得到了无量纲撞击力时间过程。将无量纲时间在21个断面上进行了离散化,通过统计检验,确定各断面上的无量纲撞击力符合正态分布,并给出了各断面的均值与标准差,进而得到了撞击力时间过程的概率统计模型。根据所建立的撞击力概率统计模型,引用随机数的生成技术,给出了生成船撞力时间过程的人工方法,并将人工生成的船撞力时间过程样本与碰撞数值模拟结果进行了比较,验证了本文方法的统计合理性和实用性。
The finite element model of nine representative ships was established. Through the collision simulation with rigid wall, a total of 81 ship collision time samples with different tonnage and different impact velocities were obtained. In order to consider the randomness of the impact time of the ship, the duration of the impact force and the amplitude of the impact force are dimensionlessized, and the time course of the dimensionless impact force is obtained. The dimensionless time was discretized on 21 sections. Through statistical tests, it was confirmed that the dimensionless impact on each section fitted the normal distribution and the mean and standard deviation of each section were given, and then the impact time Probability and Statistics Model of Process. According to the established statistical model of impact force and the generation technology of random number, an artificial method of generating ship collision time process is given. The comparison of artificial generated ship collision time course samples with the numerical results of the collision is given. Verify the statistical rationality and practicability of this method.