摘要
针对聚合釜进行模态实验并利用ANSYS软件进行数值模拟,验证了该数值模拟方法的适用性。并采用此数值模拟方法研究了大型聚合釜自由模态、约束模态、预应力模态下的前十二阶固有频率和振型,结果表明:约束模态下约束强度越大,结构整体的固有频率越大;预应力模态下内压力对于结构的固有频率影响很小;结合各部件激振频率的理论计算,原结构易发生共振现象,增加支座的数量可有效提高聚合釜的固有频率,避免发生共振。
As for the polymerization kettle,a modal test was carried out and its numerical simulation was implemented with ANSYS to verify applicability of the numerical simulation method,including having this method adopted to analyze first 12 orders’natural frequencies and vibration modes of large polymerization kettle under free mode,constrained mode and prestressed mode.The results show that,the greater the constraint strength under the constraint mode,the higher the natural frequency in the whole structure;the internal pressure influences less the natural frequency of the structure under the prestressed mode state.The theoretical calculation which considering excitation frequency of each component indicates that the original structure is prone to resonance,increasing the number of supports can effectively improve natural frequency of the polymerization kettle and avoid resonance.
作者
张森源
董金善
周瑞均
任子奇
冯俊
ZHANG Sen-yuan;DONG Jin-shan;ZHOU Rui-jun;REN Zi-qi;FENG Jun(School of Mechanical and Power Engineering,Nanjing Tech University)
出处
《化工机械》
CAS
2022年第3期432-440,共9页
Chemical Engineering & Machinery
关键词
大型聚合釜
静应力
固有频率
模态试验
动态响应
large polymerizer
static stress
natural frequency
modal test
dynamic response
