This paper presents a study in vibration field of a large-scale hydraulic cylinder actuator via numerical simulation. A model of hydrostatic hoisting machine which is built with dynamical parameters is executed for implementation and performance evaluation. | Journal of Science & Technology 130 (2018) 039-043 A Study in Vibration of a Large-Scale Hydraulic Cylinder Actuator via Numerical Simulation Van-Thuan Truong Hanoi University of Science and Technology - No. 1, Dai Co Viet Str., Hai Ba Trung, Ha Noi, Viet Nam Received: August 09, 2018; Accepted: November 26, 2018 Abstract This paper presents a study in vibration field of a large-scale hydraulic cylinder actuator via numerical simulation. A model of hydrostatic hoisting machine which is built with dynamical parameters is executed for implementation and performance evaluation. The research has applied theories of vibration and fluid mechanics in calculation, analysis and modeling. Compressibility and viscous characteristics of hydraulic oil which have impacts on system dynamics are considered. Therefore, the mathematical model of this system is equivalent to a set of mass-spring-damper in investigation. The research results deduce a practically technical prediction in design and development of hydraulic systems using large-scale cylinders. Keywords: Large-scale hydraulic cylinder, Hydraulic actuator, Vibration, Numerical simulation. 1. Introduction* actuator is obtained via numerical simulation as presented hereunder. Hydrostatic hoisting machines using large-scale hydraulic cylinder are used widely in water resource control, hydropower plants, great hoisting systems. In operation, heavy load with mega dimensions and complicated geometry is hoisted/lowered or hanged at any transition position. Hence a great inertia and hydraulic cylinder with oil fulfilled become a vibration mechanism. The vibration of hydraulic actuator may combine with bulky load bending and mechanical structure shaking to cause resonance, which phenomenon may make system stuck or more seriously destroy whole system. This problem and related topics have been mentioned in some recently published researches such as: Ning Chenxiao et al. [1] denoted some typical resources of vibration and noise of
