Abstract:

Aiming at vibration problem on air-conditioner pipeline，HyperMesh is applied to divide the designed air-conditioner pipeline model into high quality hexahedral mesh. Then, the model is imported into ANSYS to carry out modal analysis, and the natural frequencies and modes of the first 10 orders are calculated. It is found that the first order natural frequency is near the operating frequency, the vibration mode of the natural frequency is analyzed and the design scheme is put forward to improve the pipeline system, which makes the natural frequency of the air conditioning pipeline system far away from the operating frequency and avoid the resonance. Finally, the experiment is carried out with the improved structure，and it is found that the amplitude of the vibration of improved structure has been reduced by 90%. Practice shows that the application of ANSYS and other finite element technology efficiently improves the efficiency and accuracy in the process of vibration reduction of air conditioner.

摘要：

针对设计好的空调管路系统振动较大问题，运用Hyper Mesh软件将设计好的空调管路模型划分成高质量的六面体网格。再将划分好的网格模型导入Ansys中进行模态分析，分析计算出前10阶的固有频率和振型。发现1阶固有频率在工作频率附近，分析该阶固有频率的振型并据此提出管路改进的设计方案，使空调管路系统固有频率远离工作频率，避免产生共振。最后对改进前后的结构进行实验对比，得到改进后的结构振幅减小90 %的结果。实践表明在空调减振过程中应用Ansys等有限元技术辅助分析很好地提高了效率和准确性。

关键词: 振动与波, 空调管路, 模态分析, 固有频率, 减振, Ansys