scholarly journals Design of Engine Mount Bracket for a FSAE Car for Deferent Loading Condition

2019 ◽  
Vol 5 (9) ◽  
pp. 28-30
Author(s):  
Sanskar Singh ◽  
Vandana Singh ◽  
Kajol Kumari
Keyword(s):  
Modal Analysis ◽  
High Performance ◽  
Vibrational Energy ◽  
Ride Quality ◽  
Element Analysis ◽  
Dynamic Stresses ◽  
Engine Mounts ◽  
Engine Mount ◽  
And Performance ◽  
Strength And Durability

 Engine mounts have an important function of containing firmly the power-train components of a vehicle. Correct geometry and positioning of the mount brackets on the chassis ensures a good ride quality and performance. As an FSAE car intends to be a high performance vehicle, the brackets on the frame that support the engine undergo high static and dynamic stresses as well as huge amount of vibrations. Hence, dissipating the vibrational energy and keeping the stresses under a pre-determined level of safety should be achieved by careful designing and analysis of the mount brackets. Keeping this in mind the current paper discusses the modeling, Finite Element Analysis, Modal analysis and mass optimization of engine mount brackets for a FSAE car. As the brackets tend to undergo continuous vibrations and varying stresses, the fatigue strength and durability calculations also have been done to ensure engine safety. Keywords: FEA; Modal Analysis; Static Analysis; Optimization; Mounting Bracket

scholarly journals A Review on the Performance Analysis of Engine Bracket

2019 ◽  
Vol 5 (9) ◽  
pp. 8-11
Author(s):  
Shiv Kumar Pandit ◽  
Ashish Shrivastava
Keyword(s):  
Performance Analysis ◽  
High Performance ◽  
Vibrational Energy ◽  
Ride Quality ◽  
Huge Amount ◽  
Dynamic Stresses ◽  
Power Train ◽  
Engine Mounts ◽  
And Performance

Engine  mounts  have  an important  function  of  containing  firmly the  power-train  components  of  a  vehicle. Correct  geometry  and  positioning  of  the  mount  brackets  on  the  chassis ensure a good ride quality  and performance. As an FSAE car intends to be a high performance vehicle, the brackets on the frame that support the engine undergo high static and dynamic stresses as well as huge amount of vibrations. Hence, dissipating the vibrational energy and keeping the stresses under a pre-determined level of safety have been achieved by careful designing and analysis of the mount brackets.

Shape Optimization of Engine Mounts for Enhanced Vibration Isolation

2013 ◽  
Author(s):  
Fadi Alkhatib ◽  
Anoop K. Dhingra
Keyword(s):  
Finite Element Analysis ◽  
Optimization Problem ◽  
Vibration Isolation ◽  
Elastic Stiffness ◽  
Nonlinear Finite Element ◽  
Optimum Shape ◽  
Parametric Approach ◽  
Element Analysis ◽  
Engine Mounts ◽  
Engine Mount

In this article, a parametric approach is used to determine the optimum geometric shape of an engine mount in order to minimize the vibrations transmitted to and from the engine. The engine mount used is an elastomeric mount which is made of rubber. For proper vibration isolation, elastomeric mounts are designed such that they have the necessary elastic stiffness rate characteristics in all directions. An optimization problem is first solved to determine the optimum values of stiffness, orientation and location of the mount system such that vibrations transmitted are minimal. Besides determining the optimum mount stiffness values, knowing the optimum shape of the rubber mount is also vital. The shape of the mount is determined such that it meets the required stiffness of the mounting system obtained from the dynamic analysis. A nonlinear finite element analysis is used to determine the final optimum shape and stiffness of the mount.

CAE in Automotive Engine Mount Development

2010 ◽  
Author(s):  
Min Lu
Keyword(s):  
Computer Aided Engineering ◽  
Element Analysis ◽  
Automotive Engine ◽  
Performance Requirements ◽  
Mass Moment ◽  
Computer Aided ◽  
Engine Mount ◽  
Roll Axis ◽  
Development Approach ◽  
And Performance

The desire for more quiet and comfortable cars from consumers requires better engineering in the process of engine mount development. The fact that no physical vehicle exists at the time when the project launches, the design guidance relying on computer-aided engineering is essential. This paper discusses an engine mount development approach relying on computer-aided engineering with the assumption that the initial powertrain data, which include the powertrain mass, mass center, mass moment of inertia and engine power, are available. The mount placement strategy is discussed after the torque roll axis is introduced. To achieve the decoupled vibration modes for the mounting system, the computer simulated powertrain rigid body modal analysis is employed. As a result, the mount linear portion of the load-deflection curve is determined while the nonlinear portion is chosen by static analysis, whose constraint is the maximum powertrain roll angle under the condition of the maximum torque input. Also, the reaction forces in the three orthogonal directions are able to be estimated under the various loading conditions which reflect the vehicle driving conditions. Finally, finite element analysis is employed in the designs of the metallic and rubber components to meet the durability and performance requirements.

Vibration isolation analysis of tubular sandwiched structure used for trackless rubber-tyred vehicles

2018 ◽  
Vol 26 (5-6) ◽  
pp. 380-388
Author(s):  
Bijuan Yan ◽  
Binhui Han ◽  
Jun Wang ◽  
Dagang Sun
Keyword(s):  
Vibration Isolation ◽  
Underground Mining ◽  
Energy Coupling ◽  
Middle Layer ◽  
Vertical Acceleration ◽  
Element Analysis ◽  
Engine Mounts ◽  
The Finite Element Analysis ◽  
Engine Mount ◽  
Sandwiched Structure

In this article, a kind of tubular sandwiched engine mount (TSEM) was first used in the trackless rubber-tyred vehicles (TRTVs). TRTV have been playing an important role in underground mining. However, during the working of TRTV, the vibrations are always violent and these vibrations are very harmful. Therefore, reducing the vibration of TRTV has become an urgent and important matter. The TSEM was made of three layers, that is, the external layer, the internal layer and the middle layer. The finite element analysis (FEA) was carried out to find out whether the deformation of TSEM could meet the design requirements. To grasp the vibration isolation feature of the TSEM, the tests were performed under two working conditions of TRTVs. The results show that the rear engine mounts could always get good vibration-reducing performance, whereas the performance of the front mounts is sometimes poor in a certain direction, that is, perhaps owing to the vibration energy coupling in different directions. In addition, the vibration of the seat was measured. The test results show that the vertical acceleration is reduced when the vehicle is installed with the TSEM, compared with that of the seat when the vehicle is equipped with the existing old mounts. The results in this article could provide a good reference for the application of the tubular sandwiched structure in different rubber-tyred vehicles.

Chaotic Behavior of Hydraulic Engine Mount

2006 ◽  
Author(s):  
J. Christopherson ◽  
G. Nakhaie Jazar ◽  
M. Mahinfalah
Keyword(s):  
Boundary Conditions ◽  
Chaotic Behavior ◽  
Hysteretic Behavior ◽  
Constitutive Relationship ◽  
Element Analysis ◽  
Engine Mounts ◽  
Fluid Behavior ◽  
Lumped Parameter ◽  
Engine Mount ◽  
Parameter Approach

The constitutive relationships of the rubber materials that act as the main spring of a hydraulic mount are nonlinear. In addition to material induced nonlinearity, further nonlinearities may be introduced by mount geometry, turbulent fluid behavior, boundary conditions, temperature, decoupler action, and hysteretic behavior. While all influence the behavior of the system only certain aspects are realistically considered using the lumped parameter approach employed in this research. The nonlinearities that are readily modeled by the lumped parameter approach constitute the geometry and constitutive relationship induced nonlinearity, including hysteretic behavior, noting that these properties all make an appearance in the load-deflection relationship for the mount and may be readily determined via experiment or flnite element analysis. In this paper we will shoe that under certain conditions, the nonlinearities involved in the hydraulic engine mounts can show a chaotic response.

An Improved Size, Matching, and Scaling Method for the Design of Deterministic Mesoscale Truss Structures

2011 ◽  
Author(s):  
Patrick S. Chang ◽  
David W. Rosen
Keyword(s):  
High Performance ◽  
Design Method ◽  
Weight Ratio ◽  
High Strength ◽  
Original Method ◽  
Topological Optimization ◽  
Truss Structures ◽  
Scaling Method ◽  
Element Analysis ◽  
And Performance

Mesoscale truss structures are cellular structures that have support elements on the order of centimeters. These structures are engineered for high performance and have applications in industries where a high strength-to-weight ratio is desired. However, design of mesoscale truss structures currently requires some form of topological optimization that slows the design process. In previous research, a new Size, Matching and Scaling method was presented that eliminated the need for topological optimization by using a solid-body finite element analysis combined with a library of lattice configurations to generate topologies. When compared to topological optimization, results were favorable: design times were significantly reduced and performance results were comparable. In this paper, we present a modified Size Matching and Scaling design method that addresses key issues in the original method. Firstly, we outline an improve methodology. Secondly, we expand the library of configurations in order to improve lattice performance. Finally, we test the updated method and library against design examples.

scholarly journals Optimal fluid passageway design methodology for hydraulic engine mounts considering both low and high frequency performances

2019 ◽  
Vol 25 (21-22) ◽  
pp. 2749-2757
Author(s):  
Yuan Li ◽  
Jason Zheng Jiang ◽  
Simon A Neild
Keyword(s):  
High Frequency ◽  
Dynamic Stiffness ◽  
Low Frequency ◽  
Relative Displacement ◽  
Wide Frequency Range ◽  
Performance Criteria ◽  
Frequency Model ◽  
Engine Mounts ◽  
Engine Mount ◽  
And Performance

This paper investigates the potential for improving the performance of hydraulic engine mounts through fluid passageway designs. In previous studies, a few simple inertia track designs have been investigated with moderate improvements obtained. However, there are countless alternative design possibilities existing; while analyzing each one of them in turn is impracticable. To this end, this paper introduces a systematic methodology to optimize fluid passageway designs in a hydraulic engine mount. First, beneficial fluid passageway configurations are systematically identified using a linearized low-frequency model that captures the relative displacement transmissibility. A nonlinear model is then used to fine-tune the fluid passageway designs for the low-frequency transmissibility improvement, and also for the assessment of high-frequency dynamic stiffness performance. The obtained beneficial designs present performance advantages over a wide frequency range. The design approach introduced in this study is directly applicable to other engine mount models and performance criteria.

scholarly journals Construction and Performance Monitoring of Innovative Ultra-High-Performance Concrete Bridge

2021 ◽  
Vol 6 (9) ◽  
pp. 121
Author(s):  
Haena Kim ◽  
Byungkyu Moon ◽  
Xinyu Hu ◽  
Hosin (David) Lee ◽  
Gum-Sung Ryu ◽  
...  
Keyword(s):  
High Performance ◽  
Performance Monitoring ◽  
Load Transfer ◽  
High Performance Concrete ◽  
Steel Fibers ◽  
Ultra High Performance Concrete ◽  
The Us ◽  
And Performance ◽  
Strength And Durability ◽  
Ready Mix Concrete

The application of Ultra-High-Performance Concrete (UHPC) materials in rehabilitating bridges and constructing primary bridge components is increasing rapidly across the world because of their superior strength and durability characteristics when compared to regular concretes. However, there have been few new bridges constructed using UHPC materials with regular formworks, ready-mix trucks, and construction equipment. This paper presents a comprehensive report encompassing the design, construction, and performance monitoring of a new bridge constructed in Iowa using a unique UHPC technology that includes steel fibers of two different lengths embedded in the concrete. By using optimized lengths of steel fibers, both the tensile strength and the toughness were increased. The UHPC material was produced with local cement and aggregates in the US using typical ready-mix concrete equipment. This paper discusses the experience gained from the design and construction process including mix design, batching, delivery of steel fibers to the ready-mix concrete batch unit, and post-tensioning of precast slabs at the jobsite. For four years after construction, the joints of the bridge decks were monitored using strain sensors mounted on both sides of the deck joints. The strain values were quite similar between the two sides of each joint, indicating a good load transfer between precast bridge girders. A bridge was successfully constructed using a unique UHPC technology incorporating two different lengths of steel fibers and utilizing local cement and aggregates and a ready-mix truck, and has been performing satisfactorily with a good load transfer across post-tensioned precast girder joints.

scholarly journals Forecasting of strength and durability properties of High Performance Composites by Artificial Neural Networks (ANN)

2020 ◽  
Vol 184 ◽  
pp. 01103
Author(s):  
Magudeaswaran. P ◽  
Vivek Kumar C ◽  
Britto Jeyakumar M S
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Intelligent System ◽  
Computing Methods ◽  
Performance Requirements ◽  
Soft Computing Methods ◽  
Artificial Neural ◽  
And Performance ◽  
Artificial Neural Network Ann ◽  
Strength And Durability

High Performance Concrete (HPC) is the high quality concrete that requires special conformity and performance requirements. The objective of this study was to investigate the possibilities of adapting neural expert system like Artificial Neural Network (ANN) in the development of simulator and intelligent system and to predict durability and strength of HPC composites. This soft computing methods emulates the decision-making ability of a human expert benefits both the construction industry and the research community. These new methods, if properly utilized, have the potential to increase speed, service life, efficiency, consistency, minimizes errors, saves time and cost which would otherwise be squandered using the conventional approaches.

Modeling of Flexspline and Contact Analyses of Harmonic Drive

2009 ◽  
Vol 419-420 ◽  
pp. 597-600 ◽  
Author(s):  
Xiao Xia Chen ◽  
Shu Zhong Lin ◽  
Jing Zhong Xing
Keyword(s):  
High Performance ◽  
Shell Element ◽  
Harmonic Drive ◽  
Element Analysis ◽  
Experimental Distribution ◽  
Compact Size ◽  
Wave Generator ◽  
High Reduction ◽  
And Performance ◽  
Contact Relation

Harmonic drive has widespread applications for its compact size and high reduction ratios. It is often favored for electro-mechanical systems with space and weight limitation. In order to minimize the volume and improve its transmission capacity, more and more aborative design technologies are adopted. For structural analyses in assembly state and in transmission stage, Finite Element Analysis (FEA) can be widely applied to get proper parameters and performance. Flexspline usually endures large deformation under assembly force from wave generator. In transmission state, driving force leads to multiple tooth mesh contact between flexspline and circular spline teeth. In this paper, shell element is applied to build flexspline cone, and tapered beam element is used to model the teeth on the flexspline. Contact relation between flexspline and wave generator is simulated by contact element. Forced displacement of flexspline is imposed by contact analysis. Transmission forces are acted at the teeth tips on the flexspline in mesh state, whose values are determined according to experimental distribution. Simulations of assembly state and transmission state are computed in ANSYS. Deformation and stress distribution in assembly state are compared with that in transmission state. Some suggestions for long life and high performance design are present.

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