法兰-壳体安装螺栓对轴向柱塞泵振动特性影响及设计研究OA

This study focuses on the bolted connection structure between the pump flange and the housing,and establishes a finite element model of the piston pump.The model is validated through both modal analysis experiments and vibration response experiments.Based on the validated model,the influence of four design parameters—bolt position,installation radius,bolt quantity,and bolt size—on modal frequencies and vibration responses is systematically analyzed.The results indicate that a symmetrical bolt arrangement increases certain modal frequencies by up to 12.7%and reduces vibration velocity by up to 21.5%.The installation radius has a relatively minor effect on vibration characteristics.An increase in bolt size leads to higher modal frequencies,but has limited effectiveness in suppressing vibration.Increasing the number of bolts significantly improves the modal frequencies,with a maximum increase of 10.7%,and reduces vibration velocity by as much as 36.1%.An orthogonal experimental design is used to evaluate the relative significance of each parameter.The analysis confirms that bolt position and bolt quantity have the most substantial impact on the modal characteristics and vibration response of the piston pump.Bolt size has a moderate influence,while installation radius has the least effect.