The National Research and Innovation Agency (BRIN) is currently carrying out a series of bogie tests on cargo-Light Rail Transit (LRT) trains manufactured by PT INKA at the Structural Strength Technology Laboratory (TKS). The testing process was also witnessed by a group of mechanical engineering students from Universitas Pertahanan (Defense University) during a visit to PUSPIPTEK BRIN in Serpong, Thursday (27/01).
Bogie is a unified system of wheels on trains, both on self-propelled trains and non self-propelled trains. Bogies are generally used for wheels with more than 2 axles in one carriage.
BRIN researcher Budi Haryanto said the TKS Laboratory is conducting static and fatigue tests on the bogies of cargo-LRT trains. This test is intended to determine the maximum strength of the bogie to withstand the load of a freight train.
“Static test is carried out by attaching sensors at several predetermined points, then the bogie is given a load gradually, normal load and overload,” he added.
Budi said the weight of static test load can reach up to 39 tons. Then the sensors in the bogie will send data through the transmission cable to the data logger in the control center for the process of recording and analyzing data.
The next test is fatigue test (for material damage). Budi explained that in this stage the bogie will undergo testing of up to ten million cycles. This test is carried out for 16 hours every day.
“At this stage, the bogie must not crack. After going through more than 6 million test cycles, usually the bogie material will crack, but only small cracks,” he explained.
He further said that these two tests are one of the requirements needed by PT INKA to meet the requirements set by the Ministry of Transportation. After fulfilling the requirements for freight LRT train, this unit will be handed over to PT KAI as the user partner. For information, PT INKA has also tested passenger LRT trains at the TKS Lab in 2019.
Secretary of the Mechanical Engineering Study Program, the Faculty of Mechanical Engineering of University Pertahanan (UNHAN) Lt. Col. Wawan Rukmono expressed his gratitude to BRIN for welcoming students of the Faculty of mechanical engineering, and giving them the opportunity to see the test equipment.
“Students also need to know the real conditions on the field, so they can better understand the use of machines that they usually learn on campus,” he explained.
Furthermore, he said students can also learn from BRIN researchers that meticulousness, work focus, and safety factors are upheld in every activity that involves testing machines.
“Hopefully in the future UNHAN and BRIN can work together, so that our students can learn a lot from these great researchers from BRIN,” said Lt. Col. Wawan.
One of the UNHAN student representatives, Raja Akbar, enthusiastically attended the visit to the TKS Lab. As a mechanical engineering student, he did not imagine that train bogies and airplane wings such as the N219 and PUNA MALE would also be tested to see their endurance.
“Usually only from books or the internet, now I can see and interact directly with the testing machines at BRIN,” he concluded. (sas)