The excavator is the units of the heavy equipment that serves the physical development sectors such as mining excavations in the area, establishing or expanding roads and expand agricultural land and other physical development . One part of the excavator that has a very large role in the undercarriage . Undercarriage is a component of the heavy equipment that serves as a driver and has a track drive right and left track drive . This research was conducted with the aim to make modeling as excavators in general by using materials available in the market. Next, calculate the speed , direction of turn with a different variation of the track (ceramic , asphalt , soil) and the maximum tilt angle that can be achieved by the excavator . From the test data and calculations have been carried out with 3 times the gear reduction is obtained without load speed excavator bucket is 0.25 m/s while using a load of 1.5 kg bucket excavator speed is 0.24 m/s at the track ceramics . While the direction of maximum inflection occurs on the track with a diameter ceramic to turn right for 995 mm and 782 mm turn left. At the maximum angle of incline can be obtained at 10 degrees.
Laboratorium Hidrolik dan Pneumatik, Jurusan Teknik Mesin, Fakultas Teknik Universitas Riau, Indonesia.
Rockmass characterization study at Kajang Rock quarry wasperformed usingSpectral Analysisof Surface Waves (SASW)and Multichannel Analysis of Surface Waves(MASW) methods. RockQuality Designation (RQD) can be measured in the field directly.Discontinuity and processing survey methods determinedfrom 4 locations that have been examined in this study area. Based onMASW and SASW methods, velocity of S waves (Vs) can beobtained and weathering grade of rock mass has beenclassified. Location 1 consists of 5 weathering zones, SASW data indicates surface wave velocity (Vs) obtainedfrom 198 m/s to 2044 m/s, MASW (Vs) ranges obtained from <600 m/s to> 2400 m/s. Location 2 consists of 4 weatheringzones, (Vs) ofSASW obtained from 592 m/s to 2271 m/sand (Vs) of MASW obtained from 400 to 2000 m/s. Location 3 consists of 4weathering zones with (Vs) of SASW obtained from 512 m/s to 2465 m/s and (Vs)of MASW obtained from 400 to >1200 m/s. Location 4consists of 5 weathering grades with (Vs) of SASW obtained from the 200 m/s to 2040 m/s and (Vs) of MASW obtained from 300 to >2300 m/s. Rock Quality Designation (RQD) in Location 1 shown the rockquality is excellent (98.63%), in Location 2, RQD shows the rock is good(98.38%), in Location 3 RQD shows the rock is excellent(99.03%), in Location 4 RQD shows the rock is excellent(96.43%).
Engineering Geology, Universitas Islam Riau, Indonesia
The behavior of planing hull is very similar to planing flat plate. So to treat the planing hull performance at moderate Froude number, 2D planing flat plate was analyzed in different Froude number between 0.5 and 1. Finite volume, using ANSYS-CFX v14 software with RNG turbulence model was used to simulate planing plate. The numerical results of the pressure distribution, free surface profile, lift and drag at different AOAsare presented and discussed.Present calculations are compared with Kramer et al [7] results and show almost good agreement.
Department of Maritime Engineering, Amirkabir University Of Technology, Tehran, Iran
