Ice Load Distribution of Strong and Weak Members in Ice Region of Polar Ships
To explore the distribution pattern of ice loads at the connection points between the secondary members(stiffeners)and the primary supporting members(PSM)in the transvers framing structure of ice region polar ship types,a practical engineering calculation method for the loads at the connection points between stiffeners is proposed.Based on the design ice loads specified in the polar ship classification rules of the International Association of Classification Societies,a practical engineering calculation method for the loads borne by stiffeners to PSM under the design ice loads is proposed for transvers framing members.The method for distributing loads between strong and weak members in the Common Structural Rules for Bulk Carriers and Oil Tankers(HCSR)is extended and applied to the distribution of ice loads between stiffeners and PSM in the ice region polar ship types.The design ice load is applied to the outer shell of the finite element model of the midbody ice belt area of a polar research ship,and the ice load values at the connection points between the stiffener and PSM are calculated based on the stresses at the typical detail in the transverse framing on the side.The calculation results indicate that the load values obtained through numerical calculations are basically consistent with the load values obtained using the practical engineering calculation method.The method for distributing loads between strong and weak members in the HCSR can be applied to polar ship types,and the practical engineering calculation method for ice loads borne by stiffeners and distributed to PSM in the transverse framing is effective.The research results can provide design input for the structural design of connection members in the ice region of subsequent polar ship types.
polar shipice loadice region connecting memberprimary supporting membersecondary member
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