中文摘要：

螺旋弹簧受到冲击载荷时,特别是多股螺旋弹簧,由于有质量、惯性,再加上自身的谐振,钢丝材料的弹性变形、多股螺旋弹簧中钢丝与钢丝之间的相对滑移而产生的摩擦阻力等诸多因素,簧圈的运动将变得非常复杂。基于此,建立一套用于检测振动状态下螺旋弹簧任意簧圈的运动状态模型,用于揭示振动状态下螺旋弹簧任意簧圈的位移、速度、加速度随时间的变化规律,特别是用于检测冲击载荷下多股螺旋弹簧的内部变形规律。试验结果表明：螺旋弹簧运动状态分析模型结合非接触多通道检测装置,可以成功地揭示振动状态下螺旋弹簧任意簧圈的运动状态随时间的变化规律,为螺旋弹簧的动态设计理论的建立提供了试验依据。

英文摘要：

When helical springs,especially stranded-wire helical springs are impacted,the movement of every spring coil will be very complicated owing to various factors,such as the mass,inertia,resonance of springs,the elastic deformation of steel material and the internal friction induced by the relative slipping among different steel wires of stranded-wire helical springs.Based on that,a set of motion models of various helical springs under vibrational condition are proposed and they can be used to measure the relationships between displacement and time,velocity and time,acceleration and time for every spring coil.The experimental results show that the motion models of helical springs,combining a non-contact and multi-channel testing unit developed by correlative project team,are successfully in revealing the rules about how the motion of spring coils changes with the time going,which can offer experimental basis for the dynamic design theory of helical springs.