摘要
根据虚功原理,推导了子结构方法的动力学模型。采用实体单元建立了某多管火箭炮的子结构模型。计算了某多管火箭炮在不同俯仰角和装弹数量情况下的固有振动频率,得到了低阶固有频率与俯仰角的关系及低阶固有频率与火箭弹数量的关系。结果表明采用该方法计算频率,能减小计算模型,缩短计算时间。
A dynamic model using substructual method was established based on the theory of virtual work. Substructual model of some multiple rockets was established by use of entity unit. The natural frequency characteristics under different angles and the quantity of rocket projectile were calculated. The relationship among low order natural frequency, elevation angle and the quantity of rocket projectile was got. This method for calculating frequencies can reduce the dimensions of model and calculation time.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2010年第3期820-823,共4页
Journal of System Simulation
关键词
有限元
子结构法
多管火箭炮
固有频率
finite element method
substructure method
multiple rocket launcher
natural frequency
