Structure Strength Analysis of Light Truck Cab Based on Tilting Mechanism

2014 ◽  
Vol 633-634 ◽  
pp. 1237-1240
Author(s):  
Fang Ding
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Strength Analysis ◽  
Light Truck ◽  
Structure Strength ◽  
Main Components ◽  
Force Relationship ◽  
Reliable Basis

Based on the cracking phenomenon of the floor of the light truck cab, white body finite element model of a light-truck cab is established, with which computational and experimental modal calculations and analysis are conducted.Through the force relationship between tilting mechanism and the cab, the structure strength analysis of the main components of the cab is carried out, the weakness or the position of the components of the cab is found, which Provide a reliable basis for improving the structure of the tilting mechanism or the cab.

The Design and Size Optimization of the New FCEV Subframe Based on Hypermesh Platform

2011 ◽  
Vol 328-330 ◽  
pp. 435-440
Author(s):  
Jun Liao ◽  
Lan Shan ◽  
Yan Feng
Keyword(s):  
Finite Element ◽  
Comparative Analysis ◽  
Finite Element Model ◽  
Mode Shape ◽  
High Strength Steel ◽  
High Strength ◽  
Element Model ◽  
Strength Analysis ◽  
Size Optimization ◽  
Optimal Size

The establishment of FCEV finite element model of the subframe is based on Hypermesh platform, and a new subframe structure is designed in accordance with the stiffness and strength analysis on the original subframe in all conditions. High-strength steel materials are used to optimize the design of this new structure, which result in the optimal size. Through the comparative analysis of the strength, stiffness, mode shape and quality on new subframe and the original one, it is verified that the design of the new subframe is reasonable and feasible.

Design and Strength Analysis of the Wheelchair Switching Mechanism

2014 ◽  
Vol 494-495 ◽  
pp. 337-340 ◽  
Author(s):  
Yu Wen Li ◽  
Jian Kang Wei ◽  
Jin Zhang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Theoretical Basis ◽  
Element Model ◽  
Strength Analysis ◽  
Electric Wheelchair ◽  
Switching Mechanism ◽  
Design Proposal ◽  
The Finite Element Model ◽  
Climbing Stairs

Based on studying the existing electric wheelchairs for disabled are not well adapted to a variety of road conditions, broken through the structure of traditional wheelchairs, a design proposal that can make electric wheelchair achieve the function of climbing stairs and walking was putted forward and a novel mechanism was designed. The mechanism can make the crawler chassis and the wheels of wheelchair switch when needed, and make the wheelchair travel freely and flexible on the ground or on the stairs. The finite element model of the mechanism was built, and the strength analysis was carried out. The strength analysis provide the theoretical basis for the prototype manufacture.

scholarly journals The Strength Analysis of CFM56 Engine Blade

2018 ◽  
Vol 166 ◽  
pp. 04001 ◽  
Author(s):  
Zhenzhen Liu ◽  
Zhixiong Chen ◽  
Jin Chen
Keyword(s):  
Finite Element ◽  
Mechanical Load ◽  
Reference Value ◽  
Element Model ◽  
Strength Analysis ◽  
Aerodynamic Load ◽  
Aero Engine ◽  
Engine Blade ◽  
Main Components ◽  
The Finite Element Model

Aero engine is a kind of thermodynamic machinery, which require have strict aerodynamic load, mechanical load and strong durability, its longevity depends largely on the life of its main components. In this paper, a series of studies are carried out on the strength of fan blades of CFM56 engine, which provide a reference value for improving the reliability of the engine. The finite element model of the engine fan is established by using CATIA’s finite element software.The centrifugal stress distribution of the fan at different speeds and the influence of torque on fans under different speeds are calculated respectively, and the static strength of the fan is checked.

Load Generation for Structural Strength Analysis of Large Containerships

2008 ◽  
Author(s):  
Jo¨rg Ro¨rup ◽  
Thomas E. Schellin ◽  
Helge Rathje
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Structural Integrity ◽  
Element Model ◽  
Strength Analysis ◽  
Rule Based ◽  
Hull Structure ◽  
Global Strength ◽  
The Finite Element Model ◽  
Load Generation

Many modern ships, particularly large containerships, are characterized by extreme bow flare, large stern overhang, and low torsional rigidity due to an open deck structural configuration. Software package GL ShipLoad was developed as an aid to assess the structural integrity of such ships. This software tool became the standard method to generate rule based loads for a global strength finite element analysis of sea going displacement ships. It efficiently generates loads based on first principles. A graphical user interface facilitates the convenient application of ship and cargo masses to the finite element model and aids in the selection of relevant design wave situations. User defined selection criteria, such as maximum values of rule based bending moments, shear forces, or torsional moments, specify which waves have to be chosen for the global strength analysis. This approach yields a reduced number of balanced load cases that are sufficient to dimension the hull structure. To adequately simulate roll motion, additional roll angles are analyzed that simulate realistic distributions of torsional moments over the ship length. A strength analysis of a typical post-panamax containership demonstrated the load generation procedure. First, efficiently modeled mass items were grouped into reusable assembled masses for the ship at hydrostatic equilibrium. Second, regular design wave scenarios were estimated, and hydrodynamic pressures for a large number of regular waves were computed. Third, a reduced number of relevant wave situations were automatically selected, and balanced hydrostatic, hydrodynamic, and inertia loads were applied to the finite element model. Enforced roll angles were found to contribute significantly to the initial torsional moment in the fore holds. Finally, based on a locally refined FE submodel of the hatch corners in way of the ship’s fore hold, a fatigue analysis was performed to assess effects of critical loading under enforced roll angles.

Investigation of Hull Strength of River Sea Container Vessel

2019 ◽  
Vol 161 (A4) ◽  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Structural Response ◽  
Element Model ◽  
Strength Analysis ◽  
Thin Wall ◽  
Torsional Loading ◽  
Narrow Strip ◽  
Inland Navigation ◽  
Hull Strength

River sea vessels are ships for inland navigation and suitable for restricted navigation at sea in regions where, -significant wave height does not exceed 2m, according to Bureau Veritas Rules for the classification of inland vessels. In a container vessel structure, almost the entire deck space is occupied by hatches, leaving a narrow strip of deck plating outboard. This calls for a topside structure of heavy plating or a double hull to provide material in tension, stiffness against lateral and torsional loads, and resistance to buckling in compression when the vessel is in sagging condition. For sea going open deck vessels, torsional loading plays a predominant part to the hull girder strength and for inland navigation open deck vessels; the effect of torsion is rather negligible. Keeping this scenario in mind, the aim of this project is to investigate the hull strength of a river sea container vessel under combined bending and torsional loading to study the effect of torsion on river sea open deck vessel. To perform the strength analysis, firstly, a finite element model is created using Femap with NX Nastran software for the investigated vessel. Therefore, still water and wave loads are calculated using direct calculation. To find out the still water loads Argos software is used and for the wave induced loads potential flow software Hydrostar is used. Next, Finite element model is verified with classical beam theory and thin wall girder theory. Then the effect of various loading conditions on structural response is investigated. After, structural response of different hull configurations are scrutinized under combined bending and torsional loading. Finally, some recommendations are proposed for structural response of river sea container vessel subjected to combined bending and torsional loading.

The Research on Shell Strength and Pressurize Reliability of Underwater Vehicle Mating Device

2013 ◽  
Vol 572 ◽  
pp. 197-200
Author(s):  
Zhong Lin Zhang ◽  
Li Quan Wang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Deep Ocean ◽  
Element Model ◽  
Underwater Vehicle ◽  
Important Condition ◽  
Result Show ◽  
Structure Strength

Underwater vehicle has abroad applications in submarine rescue and deep-ocean workstation and so on. Moreover, mating device strength and skirt mouth pressurize is important condition for working safe. In order to realize reliable mating, endure force analyzing on steady mating to platform was put up and load to finite element model. The computing result of finite element model and experimental value is accordant. The research and experiment on pressurize methods was finished, the result show that O-type pressurize and lip-type pressurize has ensured pressurize reliability. This paper can provide reference for analogy structure Strength and pressurize reliability.

Modal and Strength Analysis on a Gearbox Housing

2010 ◽  
Vol 154-155 ◽  
pp. 1379-1383
Author(s):  
Rong Dai ◽  
Ji Sheng Ma ◽  
Hua Dong Zhang
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Finite Element Model ◽  
Kinetic Analysis ◽  
Dynamic Strength ◽  
Element Model ◽  
Dynamic Loads ◽  
Strength Analysis ◽  
Housing Design ◽  
The Given

A finite element model for the given gearbox has been established based on NASTRAN, which gives the gearbox theoretical modal analysis results. The dynamic loads of the bearings resulted from kinetic analysis is acted on the gearbox housing and the housing stress distribution under the action of dynamic loads is obtained by the calculation of dynamic strength for the housing. The research results provide a valuable reference for the housing design.

INVESTIGATION OF HULL STRENGTH OF RIVER SEA CONTAINER VESSEL

2021 ◽  
Vol 161 (A4) ◽  
Author(s):  
S Rahman
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Structural Response ◽  
Element Model ◽  
Strength Analysis ◽  
Thin Wall ◽  
Torsional Loading ◽  
Narrow Strip ◽  
Inland Navigation ◽  
Hull Strength

River sea vessels are ships for inland navigation and suitable for restricted navigation at sea in regions where, - significant wave height does not exceed 2m, according to Bureau Veritas Rules for the classification of inland vessels. In a container vessel structure, almost the entire deck space is occupied by hatches, leaving a narrow strip of deck plating outboard. This calls for a topside structure of heavy plating or a double hull to provide material in tension, stiffness against lateral and torsional loads, and resistance to buckling in compression when the vessel is in sagging condition. For sea going open deck vessels, torsional loading plays a predominant part to the hull girder strength and for inland navigation open deck vessels; the effect of torsion is rather negligible. Keeping this scenario in mind, the aim of this project is to investigate the hull strength of a river sea container vessel under combined bending and torsional loading to study the effect of torsion on river sea open deck vessel. To perform the strength analysis, firstly, a finite element model is created using Femap with NX Nastran software for the investigated vessel. Therefore, still water and wave loads are calculated using direct calculation. To find out the still water loads Argos software is used and for the wave induced loads potential flow software Hydrostar is used. Next, Finite element model is verified with classical beam theory and thin wall girder theory. Then the effect of various loading conditions on structural response is investigated. After, structural response of different hull configurations are scrutinized under combined bending and torsional loading. Finally, some recommendations are proposed for structural response of river sea container vessel subjected to combined bending and torsional loading.

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