-
Dynamic Analysis and Design of Motorcycle Mounting System Subjected to Road Loads
Fadi Alkhatib,
Anoop K. Dhingra
Issue:
Volume 4, Issue 5, October 2016
Pages:
166-175
Received:
30 July 2016
Accepted:
24 August 2016
Published:
10 September 2016
Abstract: This paper presents a comprehensive model of a motorcycle mounting system. The model presented herein consists of two main assemblies. The powertrain assembly and the swing-arm assembly are modeled as a six degree of freedom rigid bodies. The two assemblies are connected to each other using a shaft that is usually referred to as the coupler. The connection points on both assemblies are known. Unlike automobiles, motorcycle performance and handling is highly affected by the external disturbance. In addition to minimizing the shaking loads, the mounting system must be set up such that it also minimizes the external disturbance from the environment such as irregularities in the road profile and road bumps. This disturbance can be transmitted through the tire patch to the engine causing it to hit nearby components. The engine movement needs to be minimized due to space limitations surrounding the engine. In order to do so, these transmitted external loads must be minimized by the use of the mounting system. The load minimization process is achieved by selecting the optimum stiffness parameters, location and orientation of the mounting system that are supporting the engine. This goal is achieved by an optimization scheme that guarantees that the transmitted loads are minimized. An investigation will be done to explore the effect of different road profiles on the mount final geometrical shape.
Abstract: This paper presents a comprehensive model of a motorcycle mounting system. The model presented herein consists of two main assemblies. The powertrain assembly and the swing-arm assembly are modeled as a six degree of freedom rigid bodies. The two assemblies are connected to each other using a shaft that is usually referred to as the coupler. The co...
Show More
-
Stability of Crane’s Lifting Drum with Euler Distribution Forces
Qiyu Li,
Yixiao Qin,
Ming Yang
Issue:
Volume 4, Issue 5, October 2016
Pages:
176-181
Received:
4 August 2016
Accepted:
26 August 2016
Published:
21 September 2016
Abstract: In order to optimize structure parameters of lifting drum, the buckling stability of drum on crane is analyzed infinite element method with Euler distribution force which is more appropriate to the realistic load state. The results of finite element analysis are compared with the computing results of traditional simplified method. The research provides a new idea for the stability optimization design on lifting drum as cylindrical shell structure with complex inner rib plate.
Abstract: In order to optimize structure parameters of lifting drum, the buckling stability of drum on crane is analyzed infinite element method with Euler distribution force which is more appropriate to the realistic load state. The results of finite element analysis are compared with the computing results of traditional simplified method. The research prov...
Show More
-
Hertz Theory Application in Modeling and Analysis of Mechanical Rupture Force of Cocoa Pod
Josué Dzudié Fonsso,
Wolfgang Nzié,
Guy Edgar Ntamack,
Bienvenu Kenmeugné
Issue:
Volume 4, Issue 5, October 2016
Pages:
182-188
Received:
11 August 2016
Accepted:
27 August 2016
Published:
21 September 2016
Abstract: Cocoa seeds damage is a major problem facing cocoa farmers during breaking process. Hertz's theory on the contact forces was used for prediction of the rupture force just required to break a cocoa pod under compressive load along its lateral axis. Different varieties of cocoa pods were first subjected to compressive forces. Then they were placed on a test bench and subjected to the impact forces of steel mass dropped at different heights. The objective of this study is to improve the productivity of cacao pods breaker predicting the necessary rupture force. The model of the rupture force obtained from Hertz's theory performed good results compared with experimental values measured in the process of breaking the pods. The average ruptures forces of the cacao pods varieties "Criollo", "Forastero" and "Trinitario" have been determined. Rigidity (stiffness) of the pod was obtained from the force-deformation curve. There is a strongest correlation between the pod rigidity and the rupture force.
Abstract: Cocoa seeds damage is a major problem facing cocoa farmers during breaking process. Hertz's theory on the contact forces was used for prediction of the rupture force just required to break a cocoa pod under compressive load along its lateral axis. Different varieties of cocoa pods were first subjected to compressive forces. Then they were placed on...
Show More
-
Analysis of a Dual-Mode Scramjet Engine Isolator Operating From Mach 3.5 to Mach 6
Vu Ngoc Long,
Luu Hong Quan,
Nguyen Phu Hung,
Le Doan Quang
Issue:
Volume 4, Issue 5, October 2016
Pages:
189-198
Received:
28 August 2016
Accepted:
10 September 2016
Published:
29 September 2016
Abstract: Isolator is an important component of the hypersonic dual-mode scramjet engine, which plays a critical role on the stability of the engine. Flow structure inside an isolator is quite complicated due to separation zones and shock train. The main function of an isolator is to prevent the separated flow from deviating outside the engine, causing it to stop working. This paper will present a mathematical model of the flow through an isolator, then carry out theoretical flow calculation and CFD simulation in order to determine the length and the operational mode of the isolator of a dual-mode scramjet engine operating from Mach 3.5 to Mach 6. The theoretical and CFD results will also be compared to verify the mathematical model.
Abstract: Isolator is an important component of the hypersonic dual-mode scramjet engine, which plays a critical role on the stability of the engine. Flow structure inside an isolator is quite complicated due to separation zones and shock train. The main function of an isolator is to prevent the separated flow from deviating outside the engine, causing it to...
Show More
-
The Integration Model of Agricultural Products Distribution Resource Based on Grid Management
Shuchang Zhang,
Xiuli Tang,
Lixiang Huang
Issue:
Volume 4, Issue 5, October 2016
Pages:
199-204
Received:
16 September 2016
Accepted:
5 October 2016
Published:
31 October 2016
Abstract: Integrated Grid Management is proposed as a model to remodel and integrate the current system of dispersed computational resources for agricultural products distribution. Using FlexSim to simulate the model, the effectiveness of this alternative grid management model is demonstration through reduced queue length, waiting time and better resource utilization. Finally, suggestions on the policy level were put forward regarding how to realize improved efficiency of logistics resources utilization and thus, the sustainable development of the agricultural logistics sector.
Abstract: Integrated Grid Management is proposed as a model to remodel and integrate the current system of dispersed computational resources for agricultural products distribution. Using FlexSim to simulate the model, the effectiveness of this alternative grid management model is demonstration through reduced queue length, waiting time and better resource ut...
Show More
