Flaw detection of ship equipment parts

Abstract

The need for non-destructive testing is regulated by the rules of the Russian River Register, which can determine the choice of the method of non-destructive testing and the procedure for its implementation. Non-destructive testing methods used in naval mechanical engineering are: visual and measuring control, ultrasonic control, radiographic control, capillary control, magnetic control, eddy current control. Each of the methods, due to the difference in the implemented physical principles, has its own advantages and disadvantages, which impose restrictions on the flaw detection of parts. The analysis of the sculpted defects of ship equipment and machines, depending on the manufacturing method and operating conditions, was carried out. The limitations on the use of non-destructive testing methods are shown. Examples of non-flaw detective parts are given, the control of which is difficult, as well as flaw detective parts that can be controlled with a guaranteed condition for detecting defects. The advantage of the method of magnetic memory of metal is indicated, relative to other methods of non-destructive testing. Using the example of a piston pin of a marine diesel engine NVD 36, a comparative analysis of the applicability of ultrasonic testing methods, the magnetic memory method and the penetrating solutions method for detecting fatigue cracks was performed. The results of the control show that the applied methods confidently identify fatigue cracks in the controlled parts, machines and mechanisms of ship equipment.

Estimasi Umur Dan Prediksi Perilaku Kelelahan Poros Baling-Baling Kapal LCT Andros

“…Reparasi poros baling-baling merupakan salah satu solusi untuk mempertahankan penggunaan poros sebagai penerus daya, Reparasi yang dilakukan untuk memperbaiki kondisi poros yang aus, retak dan korosi. Kondisi poros yang cacat sebenarnya dapat dideteksi lebih awal, hal ini didukung oleh beberapa penelitian yang berkaitan dengan pengujian non destruktif untuk keretakan yang terjadi pada poros baling-baling [4], korosi [5]. Kegagalan karena kelelahan poros dapat terjadi karena sejumlah siklus pembebanan [6], kemudian kegagalan poros dapat dianalisis untuk mengetahui penyebab kegagalan dengan mengikuti prosedur standar [7].…”

“…Torsi poros (T), dihitung berdasarkan persamaan (1). sedangkan pada kondisi beban torsi murni dihitung menurut persamaan (5) :…”