Analisis Statis Konstruksi dan Lance Tube Sootblower Tipe Motorised Rotary Menggunakan Software Solidworks 2016

Sootblower is a boiler support equipment that works to clean soot. Sootblower requires a strong construction to support the components in order to work optimally. Sootblower is also not free from several failures on its components, the main component that causes failure on the sootblower is the lance tube. This study aims to analyze the static construction and lance tube motorized rotary sootblower type sootblower using Solidworks software. The method used in this research is a simulation based on the finite element method. The material applied to the construction is St 37 and the material on the lance tube is ASTM A213 T92. The static simulation results show that the construction design of the angle iron measuring 35×35×6 mm has a max stress value of 57,50 N/mm2 that occurs in the bolt hole, a value of max displacement of 0,0146 mm on the rod supporting the bearing, and a factor of safety value of 4,08 so it is safe to use. Static simulation on the design of 40 NB diameter lance tube with four thickness variations shows the highest max stress value, the highest max displacement, and the lowest factor of safety occurs in the lance tube thickness of 10,2 mm, which has a max stress value of 276,24 N/mm2, max displacement of 335,53 mm and a factor of safety 1,59. Lance tubes with a thickness of 10,2 mm can be declared safe because the value of the factor of safety meets the minimum limit for static loading.

Cascade Configuration of Modal Filters for Power Bus Protection in Differential and Common Modes

The paper discusses the results of quasi-static simulation of two modal filter (MF) cascade configurations designed to attenuate an interference pulse in differential and common modes. The geometric parameters of the MF are optimized by heuristic search according to the amplitude minimization condition. The results of calculating the time responses to an ultrashort pulse (USP) and electrostatic discharge (ESD) are presented. The USP attenuation coefficient in the differential mode was 6.84 times for the horizontally placed cascades, and 6.94 times for the vertical configuration. In the common mode, the attenuation coefficient was 7.35 times for the horizontally placed cascades, and 7.57 times for the vertically placed cascades. For ESD, the attenuation coefficients were 1.51 times for the horizontally and 1.55 times for the vertically placed cascades in the differential and common modes. It was found that only the first spike is attenuated by the ESD excitation on the MF

Assessing the application of Islamic and conventional hedgings in Indonesia

Purpose Banks in Indonesia offer two currency-hedging mechanisms to business players to hedge their portfolio against exchange rate risk, namely, Islamic hedging and conventional hedging. Taking into account that Islamic finance stakeholders in Indonesia want to accelerate Islamic hedging transactions, assessing the feasibility of Islamic hedging to serve the business players is very important. Thus, this paper aims to compare the conventional and Islamic currency-hedging mechanisms, particularly to identify which one to be preferred by the business players, identify terms and conditions if Islamic hedging is more preferable, give information regarding the estimated profit and payment of the premium in adopting currency-hedging (both conventional and Islamic hedgings) and prove the workability of Islamic currency-hedging as a new hedging mechanism for the business players. Design/methodology/approach The paper uses qualitative research methodology by comparing Islamic and conventional hedging and a quantitative research method by using a forward contract formula. Technically, the paper conducts a static simulation of the forward transactions by using both conventional and Islamic hedgings to hedge the foreign exchange (forex) credit received by business players from banks. The forward contract simulation uses US dollar (USD) against Indonesian rupiah (IDR) from December 2003 to February 2019 and the forward premium uses both Islamic and conventional money market rates called PUAB (conventional interbank money market) rate and PUAS (Islamic interbank money market) rate. Findings The paper finds that Islamic hedging is more preferable to conventional one due to some considerations which are the number of profitable months, the minimum payment of premium and the highest payment of profit. However, even though the Islamic hedging mechanism has the advantage of having a higher Islamic money market rate than the conventional one, the economic condition (particularly the movement of IDR exchange rate) has to be considered as well particularly during the volatile exchange rate movement. Research limitations/implications The paper has not occupied macroeconomic variables such as inflation, GDP, international trade, as they might influence the movement of IDR exchange rate. In addition, it uses static simulation rather than a dynamic one. Originality/value This is the first paper assessing both Islamic and conventional hedging mechanisms in the case of Indonesia

MINIMUM LAP TIME CALCULATION USING MATLAB

Formula Student car, to participate in different Formula Student events. Though the car was designed and all designed systems and components were validated using Static Simulation, but it was not known how would car perform on the actual track. By using different dynamic simulation methods and MATLAB programming, team has tried to understand the vehicle behaviour on track. One of the methods used by the team was, to calculate the limiting velocity for each curve on the track and to calculate the time required by the car to complete one Endurance lap of Formula Bharat 2020. This was achieved by making a mathematical model and using concepts of vehicle Dynamics. In the study different cases of the track are also discussed and how does the car behave at different portion of the track is clearly explained in the study. This helps the driver to handle the car properly. As with this information driver would be able to know how his car would behave at different corners of the track.

Effect of geometrical variations on the structural performance of shipping container panels: A parametric study towards a new alternative design

In the field of logistics, containers are indispensable for shipments of large quantities of goods, particularly for exports and imports distributed by land, sea, or air. Therefore, a container must be able to withstand external loads so that goods can safely reach their destination. In this study, seven different models of container skins were developed: general honeycomb, cross honeycomb, square honeycomb, corrugated wall, flat, flat with a single stiffener, and flat with a cross stiffener. Testing was performed using the finite element method. In the static simulation, the best results were obtained by the model with corrugated walls. As the main element and the content of the sandwich panel structure, the core plays a role in increasing the ability of the structure to absorb force, thereby increasing the strength of the material. In the thermal simulation, the best results were obtained by the general honeycomb walls. Vibration simulations also showed that the square honeycomb design was better at absorbing vibration than the other models. Finally, the corrugated model had the best critical load value in the buckling simulation.