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History

HYDRAN-XR is developed by NumSoft Technologies, which is located in Kailua, Hawaii and is owned and operated by H. Ronald Riggs, PhD, PE, F.ASCE, F.ASME. He is Professor Emeritus of Civil Engineering at the University of Hawaii.

HYDRAN-XR is the successor to HYDRAN, which was developed by Professors H. Ronald Riggs and R. Cengiz Ertekin, both of the University of Hawaii. HYDRAN was owned and developed by OffCoast, Inc. Since 2016, development of HYDRAN has ceased. NumSoft Technologies and Dr. Riggs has continued the development with HYDRAN-XR.

HYDRAN-XR (and its predecssor HYDRAN) has been used and verified over many years. Some pertinent technical publications involving its use are listed below.

Lamie, A., Hayatdavoodi, M., Wong, C., and Tang, B. (2019). ‘On motion and hydroelastic analysis of a floating offshore wind turbine.” 38th International Conference on Ocean, Offshore and Arctici Engineering, OMAE2019, Glasgow, Scotland, ASME, OMAE2019-96034.


Hydroelastic Benchmarks

Riggs, H. R., Niimi, K. M., and Huang, L. L. (2007). “Two benchmark problems for three-dimensional, linear hydroelasticity.” Journal of Offshore Mechanics and Arctic Engineering, 129, 149-157.

Suzuki, H., Riggs, H. R., Fujikubo, M., Shugar, T. A., Seto, H., Yasuzawa, Y., Bhattacharya, B., Hudson, D. A., and Shin, H. (2007). ‘Very large floating structures.” 26th International Offshore Mechanics and Arctic Engineering Conference, San Diego, ASME, OMAE2007-29758.

Riggs, H. R., Suzuki, H., Ertekin, R. C., Kim, J. W., and Iijima, K. (2008). “Comparison of hydroelastic computer codes based on the ISSC VLFS benchmark.” Ocean Engineering, 35, 589-597.

Systems of Multiple, Connected Modules

Riggs, H. R., Ertekin, R. C., and Mills, T. (1998). ‘Impact of Connector Stiffness on the Response of a Multi-Module Mobile Offshore Base.” 8th International Offshore and Polar Engineering Conference, Montreal, ISOPE, 200-207.

Riggs, H. R., Ertekin, R. C., and Mills, T. (1998). ‘Wave-Induced Response of a 5-Module Mobile Offshore Base.” 17th International Conference on Offshore Mechanics and Arctic Engineering, Lisbon, ASME, OMAE98-4440.

Riggs, H. R. and Ertekin, R. C. (1999). “Response Characteristics of Serially Connected Semisubmersibles.” Journal of Ship Research, 43(4), 229-240.

Riggs, H. R., Ertekin, R. C., and Mills, T. (1999). “Impact of Stiffness on the Response of a Multi-Module Mobile Offshore Base.” International Journal of Offshore and Polar Engineering, 9(2), 126-133.

Riggs, H. R., Ertekin, R. C., and Mills, T. R. J. (2000). “A Comparative Study of RMFC and Finite Element Models for the Wave-Induced Response of a MOB.” Marine Structures, 13(4/5), 217-232.

NFESC (2000). “Mobile offshore base (MOB) science and technology program final report.” TR-2125-OCN, Naval Facilities Engineering Service Center, Port Hueneme, CA.

Riggs, H. R. and Ertekin, R. C. (2001). ‘Hydroelastic-Based Predictions of MOB Model Tests.” 20th International Conference on Offshore Mechanics and Arctic Engineering, Rio de Janeiro, ASME, OMAE01-5028.

Hydrodynamic Loads

Hayatdavoodi, M. and Ertekin, R.C. (2015) “Wave Forces on a Submerged Horizontal Plate, Part II: Results,” J. Fluids and Structures, Vol. 54, April, pp. 580-596. DOI: 10.1016/j.jfluidstructs.2014.12.009

Hayatdavoodi, M. and Ertekin, R.C. (2015) “Wave Forces on a Submerged Horizontal Plate, Part I: Theory and Numerical Analysis,” J. Fluids and Structures, Vol. 54, April, pp. 566-579. DOI: 10.1016/j.jfluidstructs.2014.12.010

Hayatdavoodi, M. and Ertekin, R.C. (2015), “Nonlinear Wave Loads on a Submerged Deck by the Green-Naghdi Equations,” J. Offshore Mechanics and Arctic Engineering, Vol. 137, Issue 1, February, pp. 011102-1 to 011102-9, DOI: 10.1115/1.4028997

Korde, U.A. and Ertekin, R.C. (2015), “Wave Energy Conversion by Controlled Floating and Submerged Cylindrical Buoys,” J. Ocean Engineering and Marine Energy, Vol. 1, No. 3, August, pp. 255-272, DOI: 10.1007/s40722-015-0021-7

Gambacciani, G., Ertekin, R.C. and Rizzo, C.M. (2015), “Design of a Submerged Disk Wave Energy Converter,” Proc. Int. Maritime Association of the Mediterranean Conference, IMAM 2015, September 21-24, 2015, Pula, Croatia, DOI: 10.13140/RG.2.1.2018.5768

Korde, U. and Ertekin, R.C.  (2014), “Near-optimal Time-domain Control of Small Buoys in Irregular Waves,” Proc. 33th Int. Conf. on Ocean, Offshore and Arctic Engineering, OMAE ‘14, ASME, June 8-13, San Francisco, OMAE2014-24570, 7pp.

Nolte, J. and Ertekin, R.C. (2014), “Wave Power Calculations for a Wave Energy Conversion Device Connected to a Drogue,” J. Renewable and Sustainable Energy, Vol. 6, No. 1, pp. 013117-1 to 013117-21.  DOI: 10.1063/1.4862785

Korde, U. A. and Ertekin, R.C. (2014) “On wave energy focusing and conversion in open water,” Renewable Energy, Vol. 62, February, pp. 84-99. DOI: 10.1016/j.renene.2013.06.033

Schwartz, A.K., Ertekin, R.C. and Riggs, H.R. (2013) “Coupled Dynamics of a Floating OTEC Platform Design with a Cold Water Pipe,” Report submitted to the National Marine Renewable Energy Center, DOE, Dept. of Ocean and Resources Engineering, Univ. of Hawaii at Manoa, July, 30 pp., DOI: 10.13140/RG.2.1.2579.0888

Korde, U. A. and Ertekin, R.C. (2013) “An Open Water Submerged Device for Wave Energy Focusing and Conversion,” Proc. 10th Wave and Tidal Energy Conference, EWTEC 2013, Aalborg, Denmark, 2-5 September.

Ocean Energy

Floating Offshore Wind

Huang, L. L. and Riggs, H. R. (2000). “The hydrostatic stiffness of flexible floating structures for linear hydroelasticity.” Marine Structures, 13(2), 91-106.

Riggs, H. R. (2009). “Comparison of formulations for the hydrostatic stiffness of flexible structures.” Journal of Offshore Mechanics and Arctic Engineering, 131, 10.1115/1.3058702, 024501.

Other