Reliability-Based Design Optimization of Pump Penetration Shell Accounting for Material and Geometric Non-Linearity

IF 1.2 4区工程技术 Q3 ENGINEERING, MECHANICAL

Strojniski Vestnik-Journal of Mechanical Engineering Pub Date : 2021-06-15 DOI:10.5545/SV-JME.2021.7104A

Gautham Velayudhan, P. Venugopal, Ebron Shaji Gnanasigamony Thankareathenam, M. Selvakumar, Thyla Pudukarai Ramaswamy

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Abstract

The roof slab of the nuclear reactor supports all the components and sub-systems. Roof slab needs to resist the seismic loads in accordance with load-carrying criteria. The static stress analysis of the reactor roof slab reveals that high-stress concentration was present in the pump penetration shell (PPS) which supports the primary sodium pump. This paper presents the assessment of collapse load and optimization of pump penetration shell, through the reliability approach, accounting for material nonlinearity, geometrical nonlinearity and randomness in loading. In addition to that, the load-carrying capacity of PPS was determined considering two different materials, viz., IS2062 and A48P2. The design of experiments (DoE) was formulated considering the flange angle and flange thickness as parameters. An empirical model for load function was formulated from the results of the collapse load obtained for various combinations of design parameters. The above function was used to perform the reliability-based geometry optimization of PPS of the roof slab.

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考虑材料非线性和几何非线性的泵穿壳可靠性优化设计

核反应堆的顶板支撑着所有的部件和子系统。屋面板需按照荷载承载准则承受地震荷载。反应器顶板静应力分析表明，支撑主钠泵的泵穿壳存在高应力集中。在考虑材料非线性、几何非线性和载荷随机性的基础上，采用可靠性方法对泵穿壳的破坏荷载进行了评估和优化。除此之外，还考虑了IS2062和A48P2两种不同的材料，确定了PPS的承载能力。以法兰角和法兰厚度为参数，制定了试验设计方案。根据不同设计参数组合下的倒塌荷载结果，建立了荷载函数的经验模型。利用上述函数对顶板PPS进行了基于可靠性的几何优化。

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来源期刊

Strojniski Vestnik-Journal of Mechanical Engineering 工程技术-工程：机械

CiteScore

3.00

自引率

17.60%

发文量

审稿时长

4.1 months

期刊介绍： The international journal publishes original and (mini)review articles covering the concepts of materials science, mechanics, kinematics, thermodynamics, energy and environment, mechatronics and robotics, fluid mechanics, tribology, cybernetics, industrial engineering and structural analysis. The journal follows new trends and progress proven practice in the mechanical engineering and also in the closely related sciences as are electrical, civil and process engineering, medicine, microbiology, ecology, agriculture, transport systems, aviation, and others, thus creating a unique forum for interdisciplinary or multidisciplinary dialogue.