Optimizing Boat Hull and Deck Mold Storage Scheduling with Linear Programming

With a wide range of products, Sea Ray uses a vast amount of large boat molds for each of the different boat models. Storing and transporting these molds can be an issue with introducing high variability in the production process. One of the largest problems deals with the utilization of the employees’ time with the large amount of boat production. Having the boat molds being ready for production is a critical part of the manufacturing of quality boats. There is non-value added time spent on preparing the molds for the lamination process and storing them in various areas. This problem arises from an unstandardized method of picking and storing hull and deck molds unrelated to the production schedule. In order to improve this scenario, the production team needs to know what molds are needed for production, where the molds are located, and that the right maintenance has been conducted. The project scope focused on the hull and deck mold lamination process in the lamination building. This process starts from the pulling of the hull and deck molds from storage to when the part is removed from the mold and taken back to storage or production prepping. Linear programming was applied to minimize the cost of the transportation and preparation of the hull and deck molds as well as mold maintenance. Utilizing linear programing, an optimal mold storing schedule was developed based off of the production schedule and storing constraints. After running the model, there was a direct connection between the storing of the molds and the production schedule. The same production demand for the week could change based on how the production was scheduled each day. Even though higher production yielded a higher total cost, the total cost could be decreased by having molds be continuously used for production. The model used to optimize the mold scheduling could actually be used to schedule the daily production. With the implementation of a standardized mold scheduling system, total weekly costs can be decreased as well as the non-value added time of the mold transportation and maintenance employees

Variation of the Index of Notch Sensitivity with Changing Fatigue Limit

Mechanical Engineerin

Prediction of airborne radiated noise from lightly loaded lubricated meshing gear teeth

This paper introduces a novel analytical method for determination of gear airborne noise under lightly loaded conditions, often promoting gear rattle of loose unengaged gear pairs. The system examined comprises a single gear pair, modelled through integrated contact tribology and inertial transient dynamics. Lubricant film thickness, structural vibration and airborne gear noise are predicted and correlated with experimental measurements undertaken in a semi-anechoic environment. Good agreement is noticed between the numerical predictions and the experimental measurements. The presented model is capable of estimating the airborne radiated gear noise levels and the dynamic behaviour of gear pairs under different operating conditions, with superimposed impulsive input speed harmonics

The Hidden Statements of Trump’s “Public Charge” Policy

The Texas Orato

Generation Z: A Story Unfolding

The Texas Orato

Spoiled by Oil

The Texas Orato

Engineering Physics - 5

Buildings: Engineering PhysicsConstruction on the Engineering/Pysics Building on Spence Street keeps workers busy as they push for the March 1986 completion date

The Road to Facebook’s Libra: Questions and Quarrels

The Texas Orato

Factors affecting seal life in downhole motors

The life expectancy of rotary seals in downhole motors depends on temperature generated by sliding friction as well as ambient temperature. Heat transfer calculations show that sliding friction can produce a significant rise in temperature across seal assemblies, great enough to deteriorate the seal material and cause premature failure. Thermal conductivities of seal materials and thicknesses of shaft, sleeve, and housing are major design factors influencing steady state temperature profiles across seal assemblies. In general, smaller dimensions and higher thermal conductivities allow the friction generated heat to dissipate at a lower temperature. A parameter study led to an improved rotary seal configuration which will significantly lower peak seal temperatures in downhole motors. The design will channel drilling mud near the sliding friction surface for better dissipation of the friction generated heat. Plans are being made to incorporate this improvement into the bearing seal test assembly. It is doubtful that seals made of Buna-N will perform successfully on downhole motors, even when used in the improved design. On the other hand, calculated maximum temperatures are within material limitations of Grafoil

State-of-the-art of drilling thrusters

Several different concepts for applying force or thrust to drill bits are identified. Recommendations for further studies of drilling thrusters are made