一类改进的一维弹簧-质量系统  

A Modified One-Dimensional Mass-Spring Model

作　　者：祝群卫[1] 鲍荣浩[1] 

机构地区：[1]浙江大学机械与能源工程学院固体力学研究所,浙江杭州310027

出　　处：《江南大学学报（自然科学版）》2007年第3期345-349,共5页Joural of Jiangnan University (Natural Science Edition)　

摘　　要：为研究一串Ⅱ类胞元在冲击作用下的动力失效模式以及失效模式对冲击速度的敏感性,对GAO和YU提出的一维弹簧-质量系统进行了修正,忽略单个胞元的强化平台,给出了1个新的弹簧-质量模型.采用微分方程的显式积分算法,计算结果显示,系统失效模式只对速度敏感,在不同冲击速度下冲击系统会得到不同的失效模式.低速时,失效模式从冲击端到末端渐进失效;中速时,失效模式将会从两端向中间渐进失效;高速时,系统失效模式则没有规律可循.In order to find the dynamic failure modes of a chain of TypeⅡ cells and its dependent of the impact velocity, The one-dimensional mass-spring model presented by Gao and Yu was introduced by our model to omit the influence of hardening plateau. A dynamic-explicit solution method is adopted in our research. Three dynamic failure modes are only sensitive to velocity. Different impact velocities can result in the different failure modes. The results show that the structure collapse from the impact end to the fixed end with lower impact velocity, and the failure mode from the fixed end and impact end with moderate velocity, and collapse which progressive failure mode very random under higher impact velocity.

关 键 词：Ⅱ类结构 冲击 显式积分算法 渐进失效 

分 类 号：TB122[理学—工程力学]