1. School of Engineering, Ocean University of China , No. 238 Songling Road, Qingdao 266100, Shandong, P. R. China
2. School of Civil, Environmental and Mining Engineering, University of Western Australia , 35 Stirling Highway, Crawley WA 6009, Australia
3. Centre for Offshore Foundation Systems, University of Western Australia , 35 Stirling Highway, Crawley WA 6009, Australia
4. School of Computing, Engineering and Mathematics, University of Western Sydney , Penrith 2751, NSW, Australia