Research on Typical Pipeline Design Method of Power Transmission Auxiliary System based on Vibration Control

Abstract

The power transmission auxiliary system is a set of key systems of armored vehicles, which roughly includes a heat dissipation system, a lubrication system, a compressed air system, a heating system, a thermal smoke screen system, and other subsystems. It is characterized by relying on a pipeline connection so that the auxiliary system and the engine, and the transmission system form a closed loop to achieve functional output. The pipeline of the auxiliary system is mainly arranged around the engine, and the main excitation source is the engine. To improve the reliability of the power transmission auxiliary system of armored vehicles and avoid the phenomenon of running, running, dripping, and leaking, this paper mainly proposes a design method based on vibration control for the typical pipelines commonly used in armored vehicles and determines the excitation frequency of the pipelines mainly at 0~500Hz through testing the excitation source, of which the vibration energy of 150Hz~400Hz is the largest and then attenuated with the analysis of pipeline modalities by hammering test method and finite element method. By simulating the pipeline modality, and analyzing its 1st to 6th-order modes, the pipeline is optimized by changing the pipe diameter, changing the bending radius, increasing the pipeline branch, increasing the flexible link, increasing the constraint, etc., so that the pipeline avoids the resonance frequency in the corresponding mode to obtain the best design scheme of the pipeline. The research method in this paper has been successfully applied to the structural design of the test of the armored vehicle auxiliary system pipeline and other model projects. An effective design process has been formed, and the typical pipeline designed by the method has been completed with prototype trial production, bench test, and real vehicle test. The pipeline work performance is good, and the operation is smooth and reliable.