弹道修正引信隔转保护平台设计与仿真

Design and Simulation of Isolation Protection Platform for Ballistic Correction Fuze

针对弹道修正引信在高过载发射条件下的结构强度和刚度要求,及独立于弹体相对旋转的可靠性需求问题,设计了一种采用双滚动轴承跨距布置方式实现引信本体和舵机座旋转隔离,通过轴承预紧方式实现载荷传递路径主动控制及缓冲保护功能的隔转保护平台,并通过LS-DYNA建立仿真模型进行显示动力学仿真分析,获得了整体结构的应力、应变分布情况以及产生最大应力的单元位置,验证了隔转机构的承载能力,并通过对比分析了3个轴承的应力分布情况,验证了缓冲保护结构功能的有效性。

Aiming at the requirements of structural strength and rigidity of ballistic correction fuze at highload firing condition,and the reliability demand of fuze relative rotating which is independent of the cartridge body,an isolation protection platform is designed,which adopts double rolling bearing span arrangement and the buffer protection structure which uses the bearing preload to actively control the load transfer path. At the same time,LS-DYNA is used to build the simulation model of the protection platform and the display dynamic simulation analysis is carried out. The stress and strain distribution of the whole structure and the unit position of the maximum stress are obtained,which proves the overall bearing capacity. And the stress distribution of the three bearings is compared and analyzed,which verifies the function of the buffer structure.