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Structural Safety Evaluation Using Modified Latin Hypercube Sampling Technique

Volume 9, Number 5, September 2013 - Paper 06 - pp. 515-522

P. BHATTACHARJEE1, K. RAMESH KUMAR2, and T. A. JANARDHAN REDDY3

1 Reliability Engineering Division, DRDL, Hyderabad 500058, INDIA
2 Production Planning Division , DRDL, Hyderabad 500058, INDIA
3 Professor, Mechanical Engineering, Osmania University, INDIA  

(Received on December 12, 2012 and revised on June 02, 2013)

Abstract:

Structural safety and high reliability are most important requirements of aerospace product. Until recently, a design was considered to be robust if all the variables that affected its life had been taken into account and brought under control. So far designers have traditionally handled variability with safety factors. Some safety factors are derived from observation and analysis and in many cases it use to be pure guesswork. In those cases, the bigger the guess, the bigger the risk, the bigger the safety factor resulting in over design which is undesirable in case of aerospace product. In the present paper Latin Hypercube Sampling (LHS) based quasi random polar sampling technique is suggested for structural safety evaluation. The data generated from LHS are selected quasi-randomly to establish structural load & resistance dispersion and it has been used for safety evaluation. This technique is illustrated with a thin cylindrical pressure vessel, which is used extensively in aerospace applications. The proposed technique found to be simple and   this technique will be useful to pressure vessel designer during initial design phase.

 

References: 12

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