Abstract: The paper regards compressor pipeline of heat pump dryer as the research object, based on the test and simulation analysis technology for vibration optimization design of pipeline. Through the modal test of existing pipeline to modify finite element model. The results of finite element simulation and test results show that the natural frequency of existing pipeline is close to compressor frequency, causes pipeline resonance. The pipeline is optimized to avoid the resonance frequency by modifying the finite element model, reduce the structural noise caused by pipeline vibration and avoid pipeline rupture. Through test verification on the optimized model, the displacement amplitude is reduced by 73%, the acceleration amplitude is reduced by 65%. Research results can provide theoretical guidance for the press line structure design, and save the product development cycle and reduce the vibration of the pipeline.

Key words: Pipeline, Modal, Optimization design