INTRODUCTION/RESEARCH BACKGROUND
Body in white or BIW refers to the stage in automotive design or automobile manufacturing in which a car body's sheet metal components have been welded together but before moving parts (doors, hoods, and deck lids as well as fenders) the motor, chassis sub-assemblies, or trim (glass, seats, upholstery, electronics, etc.) have been added and before painting.
The body shop area, responsible for the body-in-white assembly and its subassemblies, has a special responsibility to guarantee final dimensional geometry of the automobile, what it makes possible the final assembly of the mechanic, trim, comfort and safety components with worldwide class of quality. The great operations diversity in the body shop process
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The test planning includes the selection of target mode shape (the boundary conditions, the frequency range, and the relevant mode shapes are to be determined), selection of measurement degrees of freedom, and selection of exciter degrees of freedom. Then, different preliminary studies with impact hammer and modal exciters are performed to investigate the real behavior of the BIW. In experimental modal analysis, the analysis of the acquired test data is conducted by two completely different identification algorithms, one working in the time domain (polyreference) and one working in the frequency domain (direct parameter estimation). The identified sets of modal data are subsequently correlated, allowing for an assessment of the individual quality of the measured Eigen frequencies, mode shapes, etc. This is of particular importance for subsequent model validation, since only experimental results with sufficient quality should be used. The analysis result is then undergoing the initial correlation for evaluating model quality before running the sensitivity analysis and remodeling and performing computational model updating on the …show more content…
• Comparison Experimental Modal Analysis and Finite Element Method –– Maximum 30% error value of natural frequency - Correlation. – Natural Frequency from FEM higher than Natural Frequency from EMA.
• Model Updating – 2 parameter were selected : the dynamic modulus of BIW structure, E and mass density of BIW structure,
• Structural Dynamics Modification - Error reduce to maximum 5%.
CONCLUSION
This research could be accomplished successfully within the time frame. All the methods used in experimental and simulation study are feasible. The result obtained can be used as a reference for further research.
Appendix
Tentative Research Schedule (Oct 2014-Sept 2016)
Month Activities
1 – 3 4 – 6 7 – 9 10 – 12 13 – 15 16 – 18 19 – 21 22 – 24 Oct Nov Dec Jan Feb Mar Apr May Jun July Aug Sept Oct Nov Dec Jan Feb Mar Apr May Jun July Aug Sept
Literature Survey
Modelling and Finite Element
Introduction: Quetiapine Fumarate (QF) is a psychotropic agent indicated for the treatment of schizophrenia and manic episodes associated with bipolar disorder. QF possesses good solubility in aqueous fluids (1) and ethanol. Quetiapine is available in the market with the brand name of Seroquel XL (2). Inadvertent, rapid drug release in a small period of time of the entire amount or a significant fraction of the drug contained in a prolonged release dosage form is often referred to as “dose dumping”. Jhonson F. et al.
Sensitivity Analysis The sensitivity analysis focuses on examining how Chipotle’s valuation changes when some key inputs vary. Two of the most important inputs of the valuation are the weighted average cost of capital (WACC) and the perpetuity growth rate. In this thesis, it is assumed that Chipotle would have a WACC of 6.65% and a perpetuity growth rate of 2.84%, which would result in a share price of $443.90 for Chipotle.
Welding plays an enormous role in today's advancing economy. A trade is an occupation that takes great skill and is down with one's hands the most common trades are carpentry, electricians, plumbing, auto mechanics and welding. All this trades are intertwined by one another but one of the most important career listed is welding. Without the ability to weld, cars wouldn’t be driving down the road, there would be no bridges, or even carrier ships carrying cargo to other areas of the world. Welding ensures the safety for everybody that it is involved in.
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The practices involve working in a single shift per day for 17 hours at a go. There are 2 assembly lines being used for every model, one each for body manufacturing and painting, while the other one for chassis manufacturing and mate process. There is also another Assembly line, which is shared by the three cars and is used for the purpose of Internal Assembly. The assembly lines start up requires warming up for a half hour after which the manufacturing process starts. To ensure minimal electricity usage, the assembly lines are started at a fixed time every day and shut down only in the evening.
4. Calculate the difference amidst theoretical, simulated and practical values. 5. Consult Hishan to probe in details about problematic components. 6.
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A unique feature of this tool is its automated modeling capability that aids in reducing time and effort during designing. An apparent benefit of this tool is the ability to use BIM-based design information and geometry for energy analysis. Also it supports performance based design via integrated energy modeling and analysis
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We worked out and the net present values of each option and thereafter picked the option that has lower present value of cash outflows. Our NPV calculations for both options were backed with sensitivity scenario analysis of both the buy and leas options. Sensitivity Scenario Analysis Sensitivity analysis scenario is used to show how changes in one or more variables below and above the used variables would affect the intended results. I our sensitivity analysis scenario for Dragon Air lease vs buy decision we varied the cost of capital between 1% and 5% as the main driver in the case. The tables below show the results.
Do you think Alice Thornton’s proposal to decentralize the rules and procedures of Cosmo Plastics will work? Alice proposal of decentralizing the rules and procedures in Cosmo Plastics has a bigger chance of working out in a big company with different departments and great number of employees, because then daily operations and decision-making are divided into different authorities in the organization from the top managements, to the middle and lower level managements. Especially when you have this flexibility in work hours, because some departments in the company need constant attention and discipline from the side of employees, decentralizing is needed to divide the controlling process. On another scale, small groups will be formed, employees
BMW The 7-Series Project (A) AGENDA 1) Abstract/Executive Summary 2) Problem Statement 3) Case Analysis 4) Alternative Solutions 5) Recommendations 6) Limitations 7) Appendix Abstract/Executive Summary • To explore the BMW decision about how to manufacture the Prototype vehicles. • Previously, BMW prototypes were handcrafted at the company by skilled artists. • There is a proposal to change the process and make prototypes inorder to better understand the issues that may arise during final production phase.
Introduction: The objective for the lab was to determine properties of materials by using a tension test. The properties that were determined was Young’s Modulus, ultimate tensile strength, and yield strength. Three aluminum alloys were tested. The first was the AA 2024 , which is high strength used in aerospace applications.
In the beginning of the early 1990’s Porsche faced a severe problem. After orders decreased to 30% from 1986 to 1993 the company was on the verge of bankruptcy. The loss of almost 240 Mio. DM was so far the biggest in the company’s history. Porsche’s day as an independent luxury car company seemed to be over.
I have grown up watching “Discovery and National Geography channel” programs showing how Engineer’s solving inscrutable problems encountered during the construction of High rise buildings such as “Taipei World Financial Centre “or projects like “Rebuilding New York City 's Subway”. It made me mesmerized how we drive connections from nature to engineer these gravity deifying structures and how these modern structures are changing the face of earth. This sparked a wave of renewed curiosity and interest in understanding the engineering related to structure’s and I studied tenaciously to take Civil Engineering as under-graduate major.