Analytical prediction method for crashworthiness of ship stiffened panels
ZHANG Min1, ZHAO Yanjie2,3, WANG Haikun2,3, LIU Jingxi4， LIU Haijiao5
1. College of Mechanical Engineering, Wuhan Polytechnic University, Wuhan 430048, China;
2. China Ship Scientific Research Center, Wuxi 214082, China;
3. Maritime Defense Technologies Innovation Center, Wuxi 214082, China;
4. School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, China；
5. China Ship Development and Design Center, Wuhan 430064, China
Abstract：In order to predict the crashworthiness of stiffened ship panels rapidly, an analytical method to obtain the crashworthiness of stiffened ship panels collided by a bulbous bow was proposed in the present paper. Stiffened ship panels will experience large deformation to initial fracture. For the large deformation process, the theoretical deformation modes for the plate and the attached stiffeners were proposed. Moreover, the deformation resistances for the plate and the attached stiffeners were obtained according to the theory of plastic mechanics. For the initial fracture, the expression to obtain the critical penetration depth of the plate was built. In addition, the expression to calculate the influence of the stiffener on the critical penetration depth of the plate was derived by considering the coupling effect between the stiffener and the plate. The method to obtain the critical penetration depth of the stiffened panels was finally established. Moreover, model tests were performed to validate the accuracy of the proposed analytical expressions. The research in this paper is a contribution for accurate and rapid assessment of the crashworthiness of stiffened ship panels.
张敏1，赵延杰2,3，王海坤2,3，刘敬喜4，刘海蛟5. 船体加筋板耐撞性解析预报方法研究[J]. 振动与冲击, 2021, 40(21): 25-30.
ZHANG Min1, ZHAO Yanjie2,3, WANG Haikun2,3, LIU Jingxi4， LIU Haijiao5. Analytical prediction method for crashworthiness of ship stiffened panels. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(21): 25-30.
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