为了研究柔性接头在固定燃烧室压强下的各个力矩特性，设计了弹性件材料为硅橡胶的小型柔性接头，测试了一系列9 MPa 燃烧室压强条件下接头在正弦激励下的动态特性，获得不同振幅、不同频率正弦激励下柔性接头的摆角力矩曲线，根据接头在0°摆角的力矩获得摩擦力矩，根据摆角力矩曲线的近线性部分获得弹性比力矩，通过最大角度差和力矩差获得总比力矩，在此基础上研究了摆动频率和振幅对各个力矩的影响。结果表明，库仑摩擦力矩随着振幅增大而增大，粘滞摩擦力矩随着摆动速度的增大而增大，弹性比力矩随着振幅的增大先减小后增大，随着摆动频率的增大而增大，总比力矩随着振幅的增大先减小后增大，随着频率的增大而增大。%In order to study the properties of flexible joint torque in a certain motor pressure,a miniature flexible joint with sili⁃cone rubber elastomer was designed.The dynamic characteristics of flexible joint under 9 MPa vessel pressure were tested and the curves of torque versus vector angle for the flexible joint at different amplitudes and frequencies were obtained.The friction torque was obtained through the 0° vector angle torque and the spring torque was calculated by the near⁃linear part of the torque versus vec⁃tor angle curve.In addition,the influence of excitation frequency and amplitude on the three kinds of torque were studied.Results show that coulomb friction torque increases as the excitation amplitude increases.The viscous friction torque increases with the in⁃crease of swing frequency.The spring torque and the total ratio torque increase as the swing frequency increases while decrease with the amplitude increases in a certain range and then increases as the amplitude in⁃creases.
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