Abstract:In order to solve the problem of large hydraulic structure sensor optimization better, Laxiwa arch dam is considered as the research object. In view of the shortcomings of the effective independence method for getting the points with less energy,the effective independence-total displacement method is proposed.Modal assurance criterion, maximum singular value ratio, fisher information matrix and total displacement are obtained to evaluate the sensor optimization effect among effective independence method, effective independence-total displacement method and distance coefficient - effective independence method.Study shows that effective independence-total displacement method can improve the independence and observability of the measured modes, and can improve the strain energy of the remaining points,so it is an effective and practical method for optimal sensor placement.
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