摘要
以发泡聚丙烯为主要试验材料,通过对产品、发泡聚丙烯缓冲材料组成的包装系统的正弦扫频震动和定频振动的试验分析,确定和讨论了发泡聚丙烯包装系统的非线性振动力学响应特性。运用谐波平衡法研究了此非线性系统响应的一阶近似解,得到了系统的幅-频响应曲线和可靠的非线性振动传递函数。系统的主共振幅值大小受材料阻尼的影响,阻尼越大,其幅值越小。通过对发泡聚丙烯缓冲系统的幅-频响应曲线和传递函数的掌握,可以预测系统在任意简谐激振下的振动传递率,从而提高缓冲设计的可靠性。
The mechanical vibration response of a nonlinear system was discussed through the test and analysis of the nonlinear system composed of quality （ product ）-cushion material （polypropylene foam） under the vibration with sine sweep and fixed frequency. The first harmonic response was analyzed by the method of harmonic balance and obtained the amplitude-frequency response curve of the nonlinear stiffness system and reliable transfer function. The resonating peak of system was influenced by the value of the material damp, and the bigger the damp, the smaller the peak value. Based on the mastering of the frequency response curve of polypropylene foam cushion system, the random simple harmonics excitation vibration transmittance could be forecasted and the cushion design could be more reliability based on it.
出处
《中国塑料》
CAS
CSCD
北大核心
2008年第1期54-57,共4页
China Plastics
关键词
发泡聚丙烯
振动
非线性响应
谐波平衡法
polypropylene foam
vibration
nonlinear response
harmonic balance method
