【摘要】 目的以考虑易损件的悬挂系统为对象,研究跌落冲击条件下易损件响应规律。方法建立系统无量纲动力学模型,利用四阶龙格库塔法分析易损件的位移和加速度响应。讨论系统悬挂角、频率比、阻尼比和无量纲冲击速度等参数对易损件位移、加速度响应的影响。结果系统的悬挂角、频率比以及主体与基础连接处的阻尼对易损件响应影响显著,随着系统悬挂角的增加,易损件加速度响应幅值增加,位移响应幅值减少,响应周期缩短。增加频率比可有效抑制易损件响应幅值。结论在跌落冲击条件下,悬挂系统的设计应选择适当的悬挂角、频率比等相关参数,以满足产品防护的需要。更多还原

【Abstract】 The work aims to study the response regularity of quick-wear parts under drop impact conditions with the suspension system of quick-wear parts considered as the object. Dimensionless dynamic model was built and the fourth order Ronge-Kutta method was adopted to analyze the displacement and acceleration response of quick-wear parts. The effects of such parameters as suspension angle, frequency ratio, damping ratio and dimensionless shock velocity of the system on the displacement and acceleration response of the quick-wear parts were discussed. The effects of suspension angle, frequency ratio and damping at the joint between the main body and the base on quick-wear parts response are noticeable. With the increase in the system’s suspension angle, the acceleration response amplitude of quick-wear parts would be increased, the displacement response amplitude would be decreased and the response cycle would be shortened. The increase in frequency ration could effectively restrain the response amplitude of quick-wear parts. Under the drop impact conditions, in order to design the suspension system, proper suspension angle, frequency ration and other relevant parameters should be selected, so as to meet the requirements for product protection.更多还原