SIMULASI DINAMIKA BENDA JAMAK INTERAKSI RODA-REL UNTUK LOKOMOTIF LANGSIR DI JALUR BERPUNTIR
Abstrak
Dampak puntiran rel terhadap lokomotif shunter, yang lebih jarang diteliti dibandingkan dengan kereta kecepatan tinggi dan kereta barang, dianalisis untuk memperluas pengetahuan tentang interaksi roda-rel. Studi ini berfokus pada pengaruh puntiran rel sebesar 5% terhadap gaya pegas yang dialami oleh roda kereta, dengan menyoroti isu-isu utama seperti potensi anjlok dan hilangnya kontak roda-rel. Dengan menganalisis rasio Nadal dan pengangkatan roda (wheel lift) dalam kondisi kecepatan rendah (10-20 km/jam) yang khas untuk lokomotif shunter, studi ini memberikan wawasan baru tentang keselamatan operasional. Simulasi dinamika multibodi menggunakan model lokomotif dua gandar sederhana menunjukkan bahwa, meskipun dalam kondisi puntiran rel yang menantang, rasio Nadal dan pengangkatan roda tetap berada dalam batas aman, mengindikasikan risiko anjlok yang rendah. Meskipun temuan ini sejalan dengan kriteria keselamatan yang ditetapkan untuk jenis kendaraan rel lainnya, fokus pada lokomotif shunter dalam kondisi tersebut merupakan kontribusi baru yang mengisi kesenjangan dalam literatur yang ada. Keterbatasan studi ini, termasuk penyederhanaan model dan pengecualian kompleksitas dunia nyata, menyoroti perlunya validasi lebih lanjut dan penelitian untuk meningkatkan pemahaman tentang dinamika roda-rel dalam berbagai kondisi operasional.
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