1. bookVolume 2019 (2019): Issue 2 (June 2019)
Journal Details
License
Format
Journal
First Published
30 Mar 2019
Publication timeframe
4 times per year
Languages
English
access type Open Access

A Simulation Model for Computing the Loads Generated at Landing Site During Helicopter Take-Off or Landing Operation

Published Online: 25 Jul 2019
Page range: 59 - 75
Journal Details
License
Format
Journal
First Published
30 Mar 2019
Publication timeframe
4 times per year
Languages
English
Summary

The paper presents simulation method and results of calculations determining behavior of helicopter and landing site loads which are generated during phase of the helicopter take-off and landing. For helicopter with whirling rotor standing on ground or touching it, the loads of landing gear depend on the parameters of helicopter movement, occurrence of wind gusts and control of pitch angle of the rotor blades. The considered model of helicopter consists of the fuselage and main transmission treated as rigid bodies connected with elastic elements. The fuselage is supported by landing gear modeled by units of spring and damping elements. The rotor blades are modeled as elastic axes with sets of lumped masses of blade segments distributed along them. The Runge-Kutta method was used to solve the equations of motion of the helicopter model. According to the Galerkin method, it was assumed that the parameters of the elastic blade motion can be treated as a combination of its bending and torsion eigen modes. For calculations, data of a hypothetical light helicopter were applied. Simulation results were presented for the cases of landing helicopter touching ground with different vertical speed and for phase of take-off including influence of rotor speed changes, wind gust and control of blade pitch. The simulation method may help to define the limits of helicopter safe operation on the landing surfaces.

Keywords

[1] https://www.rega.ch/en/about-us/history/1946-1959.aspx, access: 19.10.18.Search in Google Scholar

[2] http://www.samolotypolskie.pl/samoloty/2707/126/SM-12, access: 19.10.18.Search in Google Scholar

[3] Heliport Manual, 1995, Doc 9261-AN/903, ICAO publication.Search in Google Scholar

[4] Smith R.D., 1994, “Safe Heliports Through Design and Planning. A Summary of FAA Research and Development”, Report FAA No. DOT/FAA/93/17, Washington.Search in Google Scholar

[5] FAA, 2012, Advisory Circular AC 150/5390-2C, Heliport Design.Search in Google Scholar

[6] Wojewódzki B., Gulańczyk K., Muzolf P., 2015, “Koncepcja lądowiska dla śmigłowca lotniczego pogotowia ratunkowego” (Eng.: “The concept of landing fields for medical air rescue helicopters”), Logistyka-Nauka, No. 4, pp. 6793-6804, (published in electronic format on CD 2), Poznań.Search in Google Scholar

[7] Wąchalski K., 2016, “Ocena uwarunkowań konstrukcyjnych wyniesionych lądowisk dla helikopterów na budynkach szpitalnych realizowanych obecnie w Polsce”, (Eng.: “Assessment of the current construction conditions for elevated helipad on hospital buildings in Poland”), Transactions of the Institute of Aviation, No. 3(244), pp. 189-201, Warsaw.Search in Google Scholar

[8] Civil Aviation Authority, 2016, Standards for helicopter landings areas at hospitals, CAP 12643, Gatwick Airport South, West Sussex.Search in Google Scholar

[9] Dziubiński A., 2016, “CFD analysis of wind direction influence on rooftop helipad operations safety”, Transactions of the Institute of Aviation, No. 1(242), pp. 23-35.Search in Google Scholar

[10] Dziubiński A., 2016, “CFD analysis of rotor wake influence on rooftop helipad operations safety”, Transactions of the Institute of Aviation, No. 1(242), pp. 7-22.Search in Google Scholar

[11] Cieślak S., 2018, „Ocena oddziaływania wirnika nośnego śmigłowca na otoczenie” (Eng.:”Evaluation of helicopter main rotor influence on environment”), XIII Krajowe Forum Wiropłatowe, Warsaw, Poland, 29 June.Search in Google Scholar

[12] Ruchała P., Stryczniewicz W., Zalewski W., Krysztofiak G., Dziubiński A., Wojtas M., Szumań-ski K., 2018, „Eksperymentalne i numeryczne metody badań niestacjonarnego oddziaływania strumienia podwirnikowego na płytę lądowiska” (Eng.: „Experimental and numerical investigation methods of rotor unsteady downwash influence on helipad Surface”), XIII Krajowe Forum Wiropłatowe, Warsaw, Poland, 29 June.Search in Google Scholar

Recommended articles from Trend MD

Plan your remote conference with Sciendo