振动载荷对立贮式发动机粘接界面损伤影响

Effects of Vibration Load on Bonding InterfaceDamage of Vertical Storage Motor

关键词:  振动载荷  剪切应力  立式贮存  粘接界面  固体发动机

Key words:  Vibration load  Shear stress  Vertical storage  Bonding interface  Solid motor

摘要:

为研究长期舰载环境下振动载荷对立贮式固体发动机粘接界面损伤的影响，计算了不同浪级下的界面剪切应力变化，利用自制的粘接试件开展了振动试验，测试了不同振动加速度和不同振动时间下的界面力学性能，根据计算和试验数据推导了某海域舰载值班时发动机界面损伤模型，分析了在某海域连续舰载值班一年振动对发动机界面损伤的影响。结果表明，发动机舰载值班过程中平均界面剪切应力变化幅值与浪级间的关系为[|Δτl|=9.375l4-150.69l3+846.88l2-1748.41l+2917.86]；在只考虑振动条件下，舰载值班时间相同，界面最大剪切应力强度随着浪级的增大下降越来越明显，同一浪级下，界面最大剪切应力强度与振动时间呈线性关系；在某海域长期连续舰载值班时受振动载荷影响粘接界面损伤与值班时间的关系为[D=6.5×10-4t-4.68×10-4]，发动机在该海域连续值班一年振动载荷使发动机损伤值至少增加23.68%。

Abstract:

In order to study the effects of vibration load on bonding interface damage of vertical storage motor in the shipboard environment for a long time， the interfacial shear stress variation at different wave levels was calculated. The vibration test was carried out by using self-made bonding specimen， and the interfacial mechanical properties with different vibration acceleration and vibration time were measured. According to the calculation and test data， the interfacial damage model of the motor on shipboard duty in a sea is derived. The effects of the vibration load to the interface of motor after a year continuous shipboard duty in the sea was analysed. The results show that， the relationship of average interfacial shear stress variation amplitude of motor and wave levels on shipboard duty is [|Δτl|=9.375l4-150.69l3+846.88l2-1748.41l+2917.86]. Under the condition of vibration， the decrease of the interfacial maximum shear stress intensity is more and more obvious with the increase of wave levels at the same shipboard duty time， and the maximum shear stress intensity is linear with the vibration time under the same wave levels. Affected by vibration load， the relationship between bonding interface damage and duty time is [D=6.5×10-4t-4.68×10-4] when the motor is on long term continuous shipboard duty in a sea. Affected by vibration load， the damage of motor increased by at least 23.68% after a year continuous shipboard duty in this sea area.