关键词: 解锁支座, 包带, 火工品, 接触分析

Abstract:

In order to meet the requirements of complicated kinetics during the launch phase of space payload, and to realize separation between payload and satellite after in orbit, a separable clamp-band supporting structure was designed. The separation was driven by explosive bolts, and the relation between axial force of the bolts and tightening torque was analyzed. The contact model of finite-element for the structure was established and then the analyses for pre-tightening force and axial loading were conducted respectively. The analyses show that the stress in the bands decreases gradually away from the tightened bolts, the larger the coefficient of friction of the contact region, the smaller with maximum stress of clamp band. Two failure modes were analyzed. The results of the vibration show RMS acceleration magnification in three directions is very small, all of the first-order modes are greater than 200Hz, which meets the requirements of stiffness and load capacity, the device is unlocked with high reliability, and have good attenuation characteristics of impulse response.

Key words: separable supporting structure, clamp band, pyrotechnic, contact analysis