摘要
To study the similitude laws for dynamic ice force model test which is a hot problem in ice mechanics.In this paper,a new modified similitude law for dynamic ice force model test is proposed based on ice-induced virbration theory and two reasonable assumptions.And the new law is vertified with an ice-induced pier virbration example.The numerical calculation results show that,firstly,the error of frequency factor between test value and theory value is small as well as that of displacement and velocity;Secondly,the time scale completely meet the similitude relation,the waveforms anastomotic well,and the phenomenon of offset and omit do not occur;Thirdly,as the damping ratio between prototype and model is nearly equal,the improved similitude law will still be applied.Therefore,the new modified similitude law is feasible to study dynamic ice force model test and can provide reference for the ice mechanics.
To study the similitude laws for dynamic ice force model test which is a hot problem in ice mechanics. In this paper, a new modified similitude law for dynamic ice force model test is proposed based on ice-induced virbration theory and two reasonable assumptions. And the new law is vertified with an ice-induced pier virbration example. The numerical calculation results show that, firstly, the error of frequency factor between test value and theory value is small as well as that of displacement and velocity ; Secondly, the time scale completely meet the similitude relation, the waveforms anastomotic well, and the phenomenon of offset and omit do not occur; Thirdly, as the damping ratio between prototype and model is nearly equal, the improved similitude law will still he applied. Therefore, the new modified similitude law is feasible to study dynamic ice force model test and can provide reference for the ice mechanics.
基金
Sponsored by the National Natural Science Foundation of China(Grant No.50678033)
