In order to solve the difficulty of synergetic constraints of strength and vibration responses due to the difference of the models when the cruise ship is in lightweight,the sensitivity analysis of the mass and strength of main structural variables of the medium-sized cruise ship is carried out,and the four variables with the highest sensitivity to the maximum stress and mass of the whole ship are screened out.Then the response surface function surrogate model of the maximum Von-Mises stress and the maximum shear stress is constructed.Based on the surrogate model,a lightweight method of synergetic constraint of strength and vibration response is proposed,and OptiStruct code is used to the size-optimization of the main structure plate thicknesses of the whole ship.Finally,the results of the strength and vibration response are checked up.It is shown that the maximum stress increase of the whole ship after the lightweight with synergetic constraints is less than 2%comparing with the original,which is better than the results of the lightweight method of only constraining the vibration response;the effect of vibration control for the whole ship is more than 2-4 dB comparing with the results of the lightweight method of only restraining strength,and the lightweight effect of 3.232%is achieved.It can be concluded that the synergetic constraint method can realize lightweight under the premise of ensuring the strength and vibration response.
关键词
振动与波/灵敏度分析/代理模型/尺寸优化/强度约束/振动响应约束/协同约束
Key words
vibration and wave/sensitivity analysis/surrogate model/size optimization/strength constraint/vibration response constraint/synergetic constraint
维普
万方数据