Finite Element Analysis And Experimental Study Of Vibration Response Of The Oil Suction Pipe Of An Engine

The engine is an important part of a car, its property affects the driving safety and comfort of a car directly. When a car is driving on road, its any component not only should meet the static requirement, but also should meet the dynamic requirement. The oil suction pipe, an important parts of an engine, it provides lubricating oil for the engine and forms the lubricating oil film to reduce friction, wear and power consumption of the piston, crankshaft and connecting rod of the engine and absorb the heat from them. Then the engine would run effectively.Some oil suction pipes fracture and fall off from the engine, make the piston, crankshaft and connecting rod of the engine damaged without lubricating, and then the engine is destroyed. Aim at the engineering problem, this article carries out finite element analysis and experimental study of the vibration response of the oil suction pipe, and analyses the reason of the fracture of oil suction pipe. The article would provide basis for improved design and manufacturing of oil suction pipe.Firstly, this article measures the load condition of the oil suction pipe by test. Though installing acceleration sensors on the engine, and then get the excitation frequency and corresponding vibration acceleration of the engine in horizontal direction and vertical direction when the engine is under different rotational speed. Then get the load frequency of the oil suction pipe with theoretical analysis.Secondly, by using the finite element analysis software ANSYS, the article establishes the finite element model of oil suction pipe and carries out constrained modal analysis, and then get the resonant frequency and corresponding vibration mode of each mode of the oil suction pipe in four hundred hertz.Thirdly, the article carries out harmonic response analysis of the oil suction pipe, exert one gravitational acceleration load to the oil suction pipe in horizontal direction, and the excitation frequency is the resonant frequency values of each mode. Then obtain the stress distribution and the maximum stress level of the oil suction pipe when the excitation frequency is the resonant frequency value of each mode.Fourthly, according to the results of the finite element analysis, the article carries out the experimental study of vibration response of the oil suction pipe. Then compares the experimental results with the finite element analysis results. By the comparison, the experimental results show that the results of finite element analysis are true. At last, the article analyses and explains the difference of the resonant frequency values between the finite element analysis results and the experimental results.