I found a array based field in TSTimesheetLineWeek table, Field TSWeeklyHours
Now challenge is to enabled field based on Array. For example need to disabled on day 6.
Following code snippet help me to enabled disabled fields generated on the base of array extended Type
TSTimesheetLineWeek_ds.object(fieldId2Ext(fieldNum(TSTimesheetLineWeek, Hours), 6)).allowEdit(false);