水の入った円筒シェルの水平振動における非線形振動応答の影響の評価

采用厚度为0.5mm的氯乙烯薄膜制作了带盖的圆柱形水箱模型。该坦克模型直径84毫米，高度200毫米。将装有水的水箱置于振动台上，进行周期谐外力作用下的振动试验。在不同的振动台加速度和频率的外力作用下，测量了圆柱形储罐圆周方向上的4点位移和16点应变。分析了槽体的响应，给出了槽体在谐波振动、高次谐波振动、高次谐波振动、高次谐波振动、高次谐波振动和高次谐波振动时的位移响应曲线。给出了罐体周向各振型对应的简、高、次谐波振动响应曲线。将测试得到的固有频率和位移响应曲线与罐体与潜在流体相互作用的线性分析结果进行了比较。

A cylindrical tank model with lid was made from vinyl chloride film of which thickness was 0.5mm. The tank model has 84mm in diameter and 200mm in height. Setting the tank with some water on a shaking table,we carried out experimental vibration test under periodic harmonic external forces. Under various shaking table acceleration and frequency of the external force, 4 points of the tank displacement and 16 points of strain in circumferential direction of the cylindrical tank were measured. Then we analyzed the response of the tank and showed displacement response curves corresponding to harmonic oscillation, the 2nd and the 3rd higher-harmonic oscillations, and 1/3-subharmonic, 1/2-subharmonic and 3/2-subharmonic oscillations. Each vibration mode response curve in circumferential direction of the tank corresponding to those harmonic, higher-harmonic and sub-harmonic oscillations was also showed.Natural frequencies and displacement response curves obtained from the test were compared with the results obtained by applying a linear analysis of an interactive behavior of tank and potential fluid.