目的 为保证预成型机构工作中的包装精度，分析当横封器质量、初始位置、行程、周期等参数发生变化时支撑杆振动响应的变化规律。方法 将横封器与支撑杆简化为双移动质量和简支梁结构，并建立其耦合振动方程。用MEWMARK-β法求解出耦合系统在给定条件下的动态响应，并用Matlab作出变化规律曲线。结果 在横封器做正弦往复运动时，支撑杆的跨中挠度呈正弦振动。横封器和砖包机支撑杆耦合系统的振动响应与横封器质量以及砖包机支撑杆的质量、位置、行程有关。结论 可以通过减轻横封器总质量、调整横封器初始位置、缩短工作行程来降低支撑杆的振动响应。

The work aims to ensure the packaging accuracy during the operation of pre-forming mechanism and analyze the change law of support rod vibration response when the parameters change, including the weight of transverse sealing device, initial position, stroke and cycle. The transverse sealing device and support rod were simplified as double moving mass and flexible-beam system and the corresponding coupled vibration equation was established. The coupling system dynamic response was solved with the MEWMARK-β method under the given conditions and the change law curve was made by Matlab. When the transverse sealing device was in sinusoidal reciprocating motion, the mid-span deflection of the support rod was in sinusoidal vibration. The vibration response of transverse sealing device and support rod coupling system of the brick packaging machine was related to the weight, position and stroke of the brick packaging machine support rod. The vibration response of support rod can be reduce by reducing the total mass of the transverse sealing device, adjusting the initial position of the transverse sealing device and shortening the working stroke.