The surface of the hole at the large end is fixed and a lateral bearing load is applied to. Dynamic analysis of the flexible connecting rod of a slidercrank mechanism rongfong fung department of mechanical engineering, chung yuan christian university, chungli, taiwan 32023, r. Connecting rod, crank mechanism, natural frequency, noise and vibration, ansys software. As tolerance chain analysis is an essential activity in process planning for geometry assurance, a tolerance chains study based on monte carlo simulations for the connecting rod line has been performed to develop improved manufacturing solutions to lower costs and increase quality. In the figure at the right, a model of a somewhat crude connecting rod is shown.
Structural steel a36, aluminium alloy t66061 and grey cast iron ht250. Modal analysis is an effective method to determine vibration mode shapes and weak parts of the complex mechanical system, its main purpose is. Fem analysis of connecting rod of different materials using ansys. The modal analysis techniques are essential for automotive crankshaft structure design. Dynamic analysis of the flexible connecting rod of a slider. The rod is open at crank end and the total length from pin to pin is 250 mm as in fig. It connects the piston to the crankshaft and is responsible for transferring power from the piston to. The connecting rod was tested through ema with free boundary conditions. Other areas are treated in a general sense to introduce their elementary concepts and relationships to one another. Modal analysis of a single cylinder 4stroke engine crankshaft. The design of this component is very crucial to improve the durability of the engine and the mechanical efficiency of it. Understanding both the natural frequency and mode shape helps to design my structural system for noise and vibration applications. Nice answer i have one question regarding connecting rod modal analysis in ansys, it shows 6 different modes at result.
As a result of numerical calculations the maximum principal. Analytical modal analysis depends on the generation of the equations of motion of a system through a finite element model. Modal analysis is an effective method to determine vibration mode shapes and weak parts of the complex mechanical system, its main purpose is to use optimal. Mechanical vibrations overview of experimental modal analysis. The results are modal analysis of modified design is also done to investigate possibility of resonance. Finite element analysis of the connecting rod is done by considering carbon steel. Through the analysis, the inherent frequencies and mode shapes of first 5 order modes were obtained respectively. Modal analysis for connecting rod of reciprocating mud pump. Modal analysis of connecting rod of nissan z24 engine by finite element method.
Introduction exact solution of the free vibration problems is where coefficients can be determined from the initial conditions. Nov 18, 2016 nice answer i have one question regarding connecting rod modal analysis in ansys, it shows 6 different modes at result. Irfan sadaq, 3shaik vaseem yunus 1,2,3med, muffakham jah college of engineering and technology, hyderabad. A parametric model of the connecting rod is modelled using the.
Pdf modal analysis of connecting rod of nissan z24 engine. Journal of science and todays world 2012, volume 1. Dynamic load analysis was performed to determine the in service loading of the connecting rod and fea was conducted to find stresses at critical locations. Modal analysis is the process of determining the inherent dynamic characteristics of a system in form of natural frequencies, damping factors and mode shapes, and using them to formulate a mathematical model for its dynamic behaviour. After analysis a comparison is made between existing steel connecting rod viz.
In order to improve the performance of reciprocating pump and decrease the failure of the connecting rod caused by vibration during running, a modal analysis method is performed. The new method was found to take an order of magnitude less time than dehd for analyzing the connecting rod bearing. The main objective of this paper is to perform a modal analysis for the connecting rod for different. References 1 leela krishna vegi, vanu gopal vegi design and analysis of connecting rod using forged steel, international journal of. Both the natural frequency which depends on the mass and stiffness distributions in structure and mode shape. Modal analysis is helps to determine the mode shape, natural frequency hz of connecting rods. Theoretical foundations of structural dynamics in the section, the theoretical foundations of structural dynamics and modal analysis are presented under the assumption of linear behavior. Analysis of connecting rod bearing design trends using a. The static strength and dynamic characteristic of connecting rod used in model 107 l type air compressor with double actions was studied, the 3d model of connecting rod was established by solidworks software, and the finite element stress analysis and modal analysis were done by ansys. Investigation on modal transient response analysis of engine.
Results of additional investigation using the scanning electron microscope revealed the presence of microcracks in crack origin area. The method is not practical for large systems since two unknown coefficients must be introduced for each mode shape. Proe and finite element analysis is carried out by using ansys software. Introduction a connecting rod can be of two types hbeam or ibeam or a combination of both. Whereas structural analysis gives an idea about stress. Vibrational analysis and optimization of connecting rod irjet.
The average life of a malleable iron connecting rod was 764,962 cycles at a 50% survival rate or 347,734 cycles at a 90% survival rate. Design analysis and optimization of various parameters of. Modal analysis of centrifugal pump base frame using asnys workbench duration. Analysis of connecting rod is done through ansys workbench v14. Modal analysis of connecting rod as the structure of a connecting rod is complex, generally made with different number of parts. In this paper, a threedimensional finiteelement model of connecting rod was built to provide analytical frequencies and mode shapes, then the modal distribution and. When a structure is subjected to any type of load then it has to deform periodically and in any project of mechanical engineering, the same. Modal analysis provides a detailed overview of the theory of analytical and experimental modal analysis and its applications. Failure investigation of the crankshaft of diesel engine. Pdf the connecting rod is a vital component of any engine, which undergoes several stresses while in motion. The main objective of this paper is to perform a modal analysis for the. Pdf modal analysis of connecting rod of nissan z24 engine by. The modern connecting rod is made of materials that include alloy elements of titanium, aluminium, magnesium, and polymeric connecting rods. The crankshaft has to sustain all the stress and the power strokes due to the gas combustion for unobstructed functioning of the engine 4.
Feb 15, 2017 modal analysis of centrifugal pump base frame using asnys workbench duration. In this project piston, connecting rod and crankshaft are. The mass moment of inertia due connecting rod is given by equation 3. Modal analysis of connecting rod modal analysis is the study of the natural characteristics of structures. Computer aided stress and modal analysis of connecting rod. Analysis of connecting rod using composite material. An observational approach is to explore what shape shapes and natural frequencies of structures through the impact hammer tes t are formed by successive steps. Because of the separate of the connecting rod cap, connecting rod shaft, connecting rod bushes, connecting rod bearing shells, and. The connecting rod is generally heavier at the crankpin end and lighter at the reciprocating end. Modal and kinematic analysis of a connecting rod for different materials. Load analysis and multi body dynamics analysis of connecting rod. Its primary function is to transmit the push and pull from the piston pin to the crank pin, thus converting the reciprocating motion of the piston into rotary motion of the crank.
Stress analysis of connecting rod using hypermesh online workshop. Finite element and modal analysis for connecting rod used in. Design and analysis of connecting rod using finite. Structural analysis and design of a warehouse building. It can be seen from the results that there is a good agreement between the experimental and computational results in terms of modal parameter with a small discrepancy. August 8, 20 department of mechanical engineering kate gleason college of engineering.
Fundamental understanding of static,modal and dynamic analysis duration. This application note emphasizes experimental modal techniques, specifically the method known as frequency response function testing. Also vibrational analysis of the connecting rod to find its natural frequency at different mode shapes. A comparison and analysis of the various objective design functions have been made to select the best method to design the connecting rod in minimum time. Modal analysis is defined as the study of the dynamic characteristics of a mechanical structure. We use modal analysis to help design all types of structures including automotive struc. Modal ehd analysis results with only 8 modeshapes compared well with those from dehd, both for film thickness and for pressure. Modal analysis of a connecting rod using ansys researchgate. Stress analysis of connecting rod using hypermesh online workshop duration. Based on the combination of modal analysis technology and finite element method fem, the 3d model of a diesel engines connecting rod was established with ug software, and then a free modal analysis of it was carried out with ansys. Analysis of connecting rod bearing design trends using a modebased elastohydrodynamic lubrication model by travis m. A comparison and analysis of the various objective design functions have been made to select the best method to design the connectingrod in minimum time. Connecting rod, structural analysis, titanium, steel, gas load, fatigue, fea 1.
Free modal analysis and experimental verification of a diesel. The material of connecting rod will be optimized depending upon the analysis result output. They are used respectively depending on their field of application or use. The weight distribution of the connecting rod is assumed as twothirds of the weight is rotating and onethird is reciprocating 5. Fatigue analysis of connecting rod using finite element. Pdf modal analysis of a connecting rod using ansys. The connecting rod is a vital component of any engine, which undergoes several stresses while in motion.
Drawing of connecting rod for the given engine configuration, a typical connecting rod is taken as per the drawing 3. Connecting rod is an important component of the automobile engine dynamic system, it is not only a transmission component but also moving part, at the same. Pdf modal analysis of a connecting rod using ansys ajit. Abstract connecting rod acts as a moderator in between the crank and piston. So, basically, modal analysis is the study of the natural characteristics of structures. Fatigue analysis of connecting rod using finite element analysis 789 the stress at any point on the connecting rod at this axial load can be interpolated from the axial stress analysis results. The stress analysis of the connecting rod was made using the ansys software. Static fea, modal fea introduction the connecting rod is a major association inside a combustion engine. Blais a thesis submitted in partial fulfillment of the requirements for the degree of masters of science in mechanical engineering approved. Design and analysis of connecting rod using forged steel. Fem analysis of connecting rod of different materials using. The properties of connecting rod can be improved by using modal analysis, static and thermal analysis and by validation of results.
Ansys tutorial ansys workbench modal analysis youtube. The new method was found to take an order of magnitude less time than dehd for analyzing the connectingrod bearing. Pdf modal analysis of connecting rod of nissan z24. Analytical modal analysis modal analysis is the process of characterizing the dynamic response of a system in terms of its modes of vibration. Vibrational analysis and optimization of connecting rod. Because of the separate of the connecting rod cap, connecting rod shaft, connecting rod bushes, connecting rod bearing shells, and connecting rod bolt are assemble and analyse. Analysis of connecting rod bearing design trends using a mode. Cad model of connecting rod will be modelled in proe and then be analyzed in ansys software.
To solve the problem, the nonlinear static analysis was utilized. Introduction the connecting rod or conrod connects the piston to the crank or crankshaft, in a reciprocating piston engine. Here we are performing the modal analysis, harmonicresponse analysis for all three materials i. Fea analysis is the most familiar word in the field of mechanical engineering. In this work the failure, stress and modal analysis of the crankshaft of diesel engine was performed. Modal analysis is the processes of determining the inherent dynamic characteristics of any system and using them to formulate a mathematical model of the dynamic behavior of the system. This thesis describes designing and analysis of connecting rod. This study includes fea analysis and experimental modal analysis of a cane. The ductile iron connecting rod experienced an average life of 1,605,902 cycles at a 50% survival rate or 635,811 cycles at a 90% survival rate. Dec 16, 2016 fundamental understanding of static, modal and dynamic analysis duration. Pdf modal analysis of a connecting rod using ansys semantic. Visual examination of damaged part showed that the fatigue beach marks were observed on the fracture. Structural analysis and design of a warehouse building 4 figure 5 simulated model auto fem, n.
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