为提高惯性导航设备的抗冲击能力，设计了一种八杆并联的抗冲击隔离器，能够大幅度降低来源于任意方向的冲击载荷。该结构具有隔冲杆组利用率高、隔冲效果好的特点。分析其横、纵向隔冲原理，得出该结构横、纵向刚度一致，其杆组与冲击方向的夹角范围更小，载荷分配更均匀；首先，通过螺旋理论计算整体结构的空间自由度，证得八连杆抗冲击隔离器结构合理；在此基础上，利用ADAMS仿真软件对比了六、八连杆结构的水平向抗冲击性能，得出八连杆抗冲击隔离器的隔离效果更显著；接下来，讨论了冲击载荷及阻尼参数对隔离器的影响，并计算了被隔离设备在垂向、横向冲击载荷下的加速度响应；最后对隔离器进行垂向及横向冲击试验，对比并分析响应结果，得出该隔离器的垂、横、纵向隔离效果满足抗冲击要求。
Abstract
An anti-shock isolator with eight parallel links was designed which can greatly reduce the impact load from any direction. It has the characteristics of remarkable isolation effect and high utilization ratio of the links. The principle of transverse and longitudinal isolation was analyzed and found that the transverse and longitudinal stiffness of the structure is the same. The angle between the rod group and the impact direction is smaller and the load distribution is more uniform. First, through the calculating of the space freedom of the whole structure by the screw theory proved that the structure is reasonable. On this basis, the horizontal anti impact performance of the six - and eight - link structure was compared by ADAMS, it was proved that the isolation effect of eight link shock isolator is more effective. Then the impact load and damping parameters on the isolator were also discussed, and the acceleration response of isolator under vertical and lateral impact loading was calculated by simulation. Finally, the results were verified by the vertical and lateral impact experiments showed that the vertical, horizontal and longitudinal isolation effect meets the requirements of shock resistance.
关键词
隔离器 /
螺旋理论 /
自由度 /
隔离率
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Key words
isolator /
screw theory /
degree of freedom /
isolation rate
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